p-Block Elements · Chemistry · JEE Main

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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 1st February Evening Shift
Given below are two statements : Statement (I) : $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoter...
JEE Main 2024 (Online) 1st February Evening Shift
The strongest reducing agent among the following is :
JEE Main 2024 (Online) 31st January Evening Shift
Given below are two statements: Statement I : Group 13 trivalent halides get easily hydrolyzed by water due to their covalent nature. Statement II : $...
JEE Main 2024 (Online) 31st January Evening Shift
Given below are two statements: Statement I : $$\mathrm{S}_8$$ solid undergoes disproportionation reaction under alkaline conditions to form $$\mathrm...
JEE Main 2024 (Online) 31st January Evening Shift
Choose the correct statements from the following A. All group 16 elements form oxides of general formula $$\mathrm{EO}_2$$ and $$\mathrm{EO}_3$$, wher...
JEE Main 2024 (Online) 31st January Morning Shift
Consider the oxides of group 14 elements $$\mathrm{SiO}_2, \mathrm{GeO}_2, \mathrm{SnO}_2, \mathrm{PbO}_2, \mathrm{CO}$$ and $$\mathrm{GeO}$$. The amp...
JEE Main 2024 (Online) 31st January Morning Shift
The compound that is white in color is
JEE Main 2024 (Online) 31st January Morning Shift
Give below are two statements: Statement - I: Noble gases have very high boiling points. Statement - II: Noble gases are monoatomic gases. They are he...
JEE Main 2024 (Online) 30th January Evening Shift
A and B formed in the following reactions are: $$\begin{aligned} & \mathrm{CrO}_2 \mathrm{Cl}_2+4 \mathrm{NaOH} \rightarrow \mathrm{A}+2 \mathrm{NaCl}...
JEE Main 2024 (Online) 30th January Evening Shift
Choose the correct statements about the hydrides of group 15 elements. A. The stability of the hydrides decreases in the order $$\mathrm{NH}_3>\mathrm...
JEE Main 2024 (Online) 30th January Morning Shift
Given below are two statements : Statement (I) : The gas liberated on warming a salt with dil $$\mathrm{H}_2 \mathrm{SO}_4$$, turns a piece of paper d...
JEE Main 2024 (Online) 30th January Morning Shift
The Lassiagne's extract is boiled with dil $$\mathrm{HNO}_3$$ before testing for halogens because,
JEE Main 2024 (Online) 29th January Evening Shift
On passing a gas, '$$\mathrm{X}$$', through Nessler's regent, a brown precipitate is obtained. The gas '$$\mathrm{X}$$' is
JEE Main 2024 (Online) 29th January Morning Shift
Identify the incorrect pair from the following :
JEE Main 2024 (Online) 27th January Evening Shift
Given below are two statements : Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state. Statement (II) : Down the...
JEE Main 2024 (Online) 27th January Morning Shift
Element not showing variable oxidation state is :
JEE Main 2024 (Online) 27th January Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Melting point of Boron (245...
JEE Main 2023 (Online) 15th April Morning Shift
During water-gas shift reaction
JEE Main 2023 (Online) 15th April Morning Shift
For a good quality cement, the ratio of silica to alumina is found to be :
JEE Main 2023 (Online) 13th April Evening Shift
The correct group of halide ions which can be oxidised by oxygen in acidic medium is :
JEE Main 2023 (Online) 13th April Evening Shift
The covalency and oxidation state respectively of boron in $$\left[\mathrm{BF}_{4}\right]^{-}$$, are :
JEE Main 2023 (Online) 13th April Morning Shift
The incorrect statement from the following for borazine is :
JEE Main 2023 (Online) 12th April Morning Shift
Given below are two statements : Statement I : Boron is extremely hard indicating its high lattice energy. Statement II : Boron has highest melting an...
JEE Main 2023 (Online) 12th April Morning Shift
Given below are two statements : Statement I : $$\mathrm{SbCl}_{5}$$ is more covalent than $$\mathrm{SbCl}_{3}$$ Statement II: The higher oxides of ha...
JEE Main 2023 (Online) 11th April Evening Shift
Which one of the following pairs is an example of polar molecular solids?
JEE Main 2023 (Online) 11th April Evening Shift
One mole of $$\mathrm{P}_{4}$$ reacts with 8 moles of $$\mathrm{SOCl}_{2}$$ to give 4 moles of $$\mathrm{A}, x$$ mole of $$\mathrm{SO}_{2}$$ and 2 mol...
JEE Main 2023 (Online) 11th April Morning Shift
For compound having the formula $$\mathrm{GaAlCl}_{4}$$, the correct option from the following is :
JEE Main 2023 (Online) 6th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 1st February Evening Shift
The correct order of bond enthalpy ($$\mathrm{kJ~mol^{-1}}$$) is :
JEE Main 2023 (Online) 1st February Evening Shift
For electron gain enthalpies of the elements denoted as $$\Delta_{\mathrm{eg}} \mathrm{H}$$, the incorrect option is :
JEE Main 2023 (Online) 1st February Morning Shift
Given below are two statements: Statement I : Chlorine can easily combine with oxygen to form oxides; and the product has a tendency to explode. State...
JEE Main 2023 (Online) 31st January Evening Shift
The Lewis acid character of boron tri halides follows the order :
JEE Main 2023 (Online) 31st January Evening Shift
Given below are two statements : Statement I: Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes ...
JEE Main 2023 (Online) 30th January Evening Shift
Boric acid is solid, whereas $\mathrm{BF}_3$ is gas at room temperature because of :
JEE Main 2023 (Online) 29th January Morning Shift
During the borax bead test with $$\mathrm{CuSO_4}$$, a blue green colour of the bead was observed in oxidising flame due to the formation of :
JEE Main 2023 (Online) 29th January Morning Shift
"A" obtained by Ostwald's method involving air oxidation of NH$$_3$$, upon further air oxidation produces "B", "B" on hydration forms an oxoacid of Ni...
JEE Main 2023 (Online) 25th January Evening Shift
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Carbon forms two important oxides -...
JEE Main 2023 (Online) 25th January Evening Shift
A. Ammonium salts produce haze in atmosphere. B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals. C. Polychlorinated bipheny...
JEE Main 2023 (Online) 25th January Evening Shift
Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from :
JEE Main 2023 (Online) 25th January Morning Shift
Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A] and [B] are respectively :...
JEE Main 2023 (Online) 25th January Morning Shift
Compound A reacts with NH$$_4$$Cl and forms a compound B. Compound B reacts with H$$_2$$O and excess of CO$$_2$$ to form compound C which on passing t...
JEE Main 2023 (Online) 24th January Evening Shift
$$\mathrm{K_2Cr_2O_7}$$ paper acidified with dilute $$\mathrm{H_2SO_4}$$ turns green when exposed to :
JEE Main 2023 (Online) 24th January Morning Shift
Which of the Phosphorus oxoacid can create silver mirror from $$\mathrm{AgNO_3}$$ solution?
JEE Main 2022 (Online) 29th July Evening Shift
In liquation process used for tin (Sn), the metal :
JEE Main 2022 (Online) 29th July Evening Shift
Given below are two statements. Statement I : Stannane is an example of a molecular hydride. Statement II : Stannane is a planar molecule. In the ligh...
JEE Main 2022 (Online) 29th July Evening Shift
When borax is heated with $$\mathrm{CoO}$$ on a platinum loop, blue coloured bead formed is largely due to :
JEE Main 2022 (Online) 29th July Evening Shift
Dinitrogen is a robust compound, but reacts at high altitudes to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynth...
JEE Main 2022 (Online) 28th July Evening Shift
White phosphorus reacts with thionyl chloride to give :
JEE Main 2022 (Online) 28th July Evening Shift
Concentrated $$\mathrm{HNO}_{3}$$ reacts with Iodine to give :
JEE Main 2022 (Online) 28th July Evening Shift
Dinitrogen and dioxygen, the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because :
JEE Main 2022 (Online) 27th July Evening Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Boron is unable to form $$\...
JEE Main 2022 (Online) 27th July Morning Shift
Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Activated charcoal adsorbs SO2 mor...
JEE Main 2022 (Online) 27th July Morning Shift
Given below are two statements. Statement I: The chlorides of $$\mathrm{Be}$$ and $$\mathrm{Al}$$ have Cl-bridged structure. Both are soluble in organ...
JEE Main 2022 (Online) 27th July Morning Shift
Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?
JEE Main 2022 (Online) 26th July Evening Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion : Boric acid is a weak acid. Reason R...
JEE Main 2022 (Online) 26th July Morning Shift
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
JEE Main 2022 (Online) 26th July Morning Shift
Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "$$X$$" with 6-equivalents of "$$Y$$". "$$X$$" and "$$Y...
JEE Main 2022 (Online) 25th July Evening Shift
The total number of acidic oxides from the following list is NO, N2O, B2O3, N2O5, CO, SO3, P4O10...
JEE Main 2022 (Online) 25th July Evening Shift
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2022 (Online) 25th July Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2022 (Online) 25th July Morning Shift
The geometry around boron in the product 'B' formed from the following reaction is $$ \begin{aligned} &\mathrm{BF}_{3}+\mathrm{NaH} \stackrel{450 \mat...
JEE Main 2022 (Online) 25th July Morning Shift
The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :
JEE Main 2022 (Online) 30th June Morning Shift
A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}^{573\,K}} $$ Red phosphorus $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{under\,press...
JEE Main 2022 (Online) 29th June Evening Shift
Aqueous solution of which of the following boron compounds will be strongly basic in nature?
JEE Main 2022 (Online) 29th June Evening Shift
Sulphur dioxide is one of the components of polluted air. SO2 is also a major contributor to acid rain. The correct and complete reaction to represent...
JEE Main 2022 (Online) 29th June Morning Shift
Match List-I with List-II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2022 (Online) 29th June Morning Shift
The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, is :
JEE Main 2022 (Online) 28th June Evening Shift
Among the given oxides of nitrogen ; N2O, N2O3, N2O4 and N2O5, the number of compound/(s) having N - N bond is :...
JEE Main 2022 (Online) 28th June Evening Shift
Which of the following oxoacids of sulphur contains "S" in two different oxidation states?
JEE Main 2022 (Online) 28th June Morning Shift
Nitrogen gas is obtained by thermal decomposition of :
JEE Main 2022 (Online) 28th June Morning Shift
Given below are two statements : Statement I : The pentavalent oxide of group-15 element, E2O5, is less acidic than trivalent oxide, E2O3, of the same...
JEE Main 2022 (Online) 27th June Evening Shift
The gas produced by treating an aqueous solution of ammonium chloride with sodium nitrite is :
JEE Main 2022 (Online) 27th June Evening Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Fluorine forms one oxoacid. Reaso...
JEE Main 2022 (Online) 27th June Evening Shift
Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2022 (Online) 27th June Morning Shift
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
JEE Main 2022 (Online) 27th June Morning Shift
Heating white phosphorus with conc. NaOH solution gives mainly :
JEE Main 2022 (Online) 26th June Evening Shift
Which of the following elements is considered as a metalloid?
JEE Main 2022 (Online) 26th June Evening Shift
The oxide which contains an odd electron at the nitrogen atom is :
JEE Main 2022 (Online) 26th June Morning Shift
Choose the correct stability order of group 13 elements in their + 1 oxidation state :
JEE Main 2022 (Online) 26th June Morning Shift
The correct order of melting points of hydrides of group 16 elements is :
JEE Main 2022 (Online) 26th June Morning Shift
Consider the following reaction : A + alkali $$\to$$ B (Major Product) If B is an oxoacid of phosphorus with no P-H bond, then A is :...
JEE Main 2022 (Online) 25th June Evening Shift
The number of bridged oxygen atoms present in compound B formed from the following reactions is Pb(NO3)2 $$\buildrel {673\,K} \over \longrightarrow $...
JEE Main 2022 (Online) 25th June Morning Shift
White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :
JEE Main 2022 (Online) 24th June Evening Shift
PCl5 is well known, but NCl5 is not. because,
JEE Main 2022 (Online) 24th June Morning Shift
Identify the correct statement for B2H6 from those given below : (A) In B2H6, all B-H bonds are equivalent. (B) In B2H6, there are four 3-centre-2-ele...
JEE Main 2022 (Online) 24th June Morning Shift
The most stable trihalide of nitrogen is :
JEE Main 2022 (Online) 24th June Morning Shift
Which one of the following elemental forms is not present in the enamel of the teeth?
JEE Main 2021 (Online) 1st September Evening Shift
The oxide without nitrogen-nitrogen bond is :
JEE Main 2021 (Online) 31st August Evening Shift
Which one of the following correctly represents the order of stability of oxides, X2O; (X = halogen)?
JEE Main 2021 (Online) 31st August Evening Shift
The number of S = O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :
JEE Main 2021 (Online) 27th August Evening Shift
Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?
JEE Main 2021 (Online) 27th August Morning Shift
In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?
JEE Main 2021 (Online) 27th August Morning Shift
In polythionic acid, H2SxO6 (x = 3 to 5) the oxidation state(s) of sulphur is/are :
JEE Main 2021 (Online) 26th August Evening Shift
The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl5 is :
JEE Main 2021 (Online) 26th August Evening Shift
Chalcogen group elements are :
JEE Main 2021 (Online) 26th August Morning Shift
The incorrect statement is :
JEE Main 2021 (Online) 27th July Evening Shift
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : SO2(g) is absorbed to a large ext...
JEE Main 2021 (Online) 27th July Evening Shift
Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
JEE Main 2021 (Online) 27th July Evening Shift
Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are :
JEE Main 2021 (Online) 27th July Morning Shift
The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :
JEE Main 2021 (Online) 25th July Morning Shift
Which one of the following compounds of Group-14 elements is not known?
JEE Main 2021 (Online) 22th July Evening Shift
Given below are the statements about diborane(a) Diborane is prepared by the oxidation of NaBH4 with I2(b) Each boron atom is in sp2 hybridized state(...
JEE Main 2021 (Online) 22th July Evening Shift
Which one of the following group-15 hydride is the strongest reducing agent?
JEE Main 2021 (Online) 20th July Morning Shift
The species given below that does NOT show disproportionation reaction is :
JEE Main 2021 (Online) 20th July Morning Shift
Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and P4O10 (in 4 : 1 ratio) is :...
JEE Main 2021 (Online) 18th March Morning Shift
Match List - I with List - II List - I(process) List - II(catalyst) (a) Deacron's process (i) ZSM-5 ...
JEE Main 2021 (Online) 18th March Morning Shift
The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is :
JEE Main 2021 (Online) 17th March Evening Shift
The set that represents the pair of neutral oxides of nitrogen is :
JEE Main 2021 (Online) 16th March Evening Shift
The INCORRECT statement regarding the structure of C60 is :
JEE Main 2021 (Online) 16th March Morning Shift
Match List - I with List - II : List - IIndustrial process List - IIApplication (a) Haber's process (i) ...
JEE Main 2021 (Online) 16th March Morning Shift
A group of 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is :
JEE Main 2021 (Online) 16th March Morning Shift
Match List - I with List - II : List - I Name of oxo acid List - II Oxidation state of 'P' (a) Hypophosphorous a...
JEE Main 2021 (Online) 26th February Evening Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.Assertion A : In TlI3, isomorphous to CsI3, the ...
JEE Main 2021 (Online) 26th February Morning Shift
Find A, B and C in the following reactions :$$N{H_3} + A + C{O_2} \to {(N{H_4})_2}C{O_3}$$$${(N{H_4})_2}C{O_3} + {H_2}O + B \to N{H_4}HC{O_3}$$$$N{H_4...
JEE Main 2021 (Online) 26th February Morning Shift
On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respe...
JEE Main 2021 (Online) 25th February Evening Shift
Given below are two statements :Statement I : $$\alpha$$ and $$\beta$$ forms of sulphur can change reversibly between themselves with slow heating or ...
JEE Main 2021 (Online) 25th February Morning Shift
The correct statement about B2H6 is :
JEE Main 2021 (Online) 24th February Morning Shift
Al2O3 was leached with alkali to get X. The solution of X on passing of gas Y, forms Z. X, Y and Z respectively are :
JEE Main 2020 (Online) 6th September Evening Slot
The reaction of NO with N2O4 at 250 K gives :
JEE Main 2020 (Online) 6th September Evening Slot
Reaction of an inorganic sulphite X with dilute H2SO4 generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and wat...
JEE Main 2020 (Online) 6th September Morning Slot
The correct statement with respect to dinitrogen is :
JEE Main 2020 (Online) 5th September Evening Slot
Boron and silicon of very high purity can be obtained through :
JEE Main 2020 (Online) 5th September Evening Slot
Reaction of ammonia with excess Cl2 gives :
JEE Main 2020 (Online) 4th September Morning Slot
On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes t...
JEE Main 2020 (Online) 3rd September Morning Slot
Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is :
JEE Main 2020 (Online) 3rd September Morning Slot
In a molecule of pyrophosphoric acid, the number of P - OH, P = O and P - O - P bonds/moiety(ies) respectively are :
JEE Main 2020 (Online) 2nd September Morning Slot
On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2 in the presence of a catalyst gives another gas (...
JEE Main 2020 (Online) 9th January Evening Slot
The reaction of H3N3B3Cl3 (A) with LiBH4 in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H3N3B3(Me)3. C...
JEE Main 2020 (Online) 9th January Morning Slot
'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is :
JEE Main 2020 (Online) 8th January Evening Slot
A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives...
JEE Main 2020 (Online) 8th January Evening Slot
White Phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound (X). (X) on acidification with...
JEE Main 2020 (Online) 8th January Morning Slot
The number of bonds between sulphur and oxygen atoms in S2O82- and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectiv...
JEE Main 2020 (Online) 7th January Evening Slot
In the following reaction, products (A) and (B) respectively, are : NaOH + Cl2 $$ \to $$ (A) + side products (hot and conc.) Ca(OH)2 + Cl2 $$ \to $$ (...
JEE Main 2019 (Online) 12th April Evening Slot
The C–C bond length is maximum in :
JEE Main 2019 (Online) 12th April Morning Slot
The basic structural unit of feldspar, zeolites, mica, and asbestos is :
JEE Main 2019 (Online) 10th April Evening Slot
The noble gas that does not occur in the atmosphere is :
JEE Main 2019 (Online) 10th April Evening Slot
The number of pentagons in C60 and trigons (triangles) in white phosphorus, respectively, are :
JEE Main 2019 (Online) 10th April Morning Slot
The correct order of catenation is :
JEE Main 2019 (Online) 9th April Evening Slot
The amorphous form of silica is :
JEE Main 2019 (Online) 9th April Evening Slot
The correct statements among I to III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (II) Oxides of aluminium and gallium are am...
JEE Main 2019 (Online) 9th April Morning Slot
C60 an allotrope of carbon contains :
JEE Main 2019 (Online) 8th April Morning Slot
Diborane (B2H6) reacts with O2 and H2O independently, then products formed are :
JEE Main 2019 (Online) 12th January Evening Slot
The element that does NOT show catenation is :
JEE Main 2019 (Online) 12th January Evening Slot
The element that shows greater ability to form p$$\pi $$-p$$\pi $$ multiple bonds, is :
JEE Main 2019 (Online) 12th January Evening Slot
Chlorine on reaction with hot and concentrated sodium hydroxide give :
JEE Main 2019 (Online) 12th January Morning Slot
Iodine reacts with concentrated HNO3 to yield Y along with other products. The oxidation state of iodine in Y, is :
JEE Main 2019 (Online) 11th January Evening Slot
The relative stability of +1 oxidation state of group 13 elements follows the order :
JEE Main 2019 (Online) 11th January Evening Slot
The hydride that is NOT electron deficient :
JEE Main 2019 (Online) 11th January Morning Slot
The chloride that CANNOT get hydrolysed is :
JEE Main 2019 (Online) 10th January Evening Slot
Among the following reactions of hydrogen with halogens, the one that requires a catalyst is :
JEE Main 2019 (Online) 10th January Evening Slot
The number of 2-centre-2-electron and 3-centre -2-electron bonds in B2H6, respectively, are :
JEE Main 2019 (Online) 9th January Evening Slot
Good reducing nature of H3PO2 is attributed to the presence of :
JEE Main 2019 (Online) 9th January Morning Slot
Correct statements among a to d regarding silicones are : (a)   They are polymers with hydrophobic character. (b)   Th...
JEE Main 2019 (Online) 9th January Morning Slot
The one that is extensively used as a piezoelectric material is :
JEE Main 2018 (Online) 16th April Morning Slot
Among the oxides of nitrogen : N2O3, N2O4 and N2O5; the molecule(s) having nitrogen-nitrogen bond is / are : ...
JEE Main 2018 (Online) 16th April Morning Slot
A group 13 element 'X' reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts with NH3 to form Cl3X $$ \lef...
JEE Main 2018 (Offline)
The compound that does not produce nitrogen gas by the thermal decomposition is :
JEE Main 2018 (Offline)
When metal ‘M’ is treated with NaOH, a white gelatinous precipitate ‘X’ is obtained, which is soluble in excess of NaOH. Compound ‘X’ when heated stro...
JEE Main 2018 (Online) 15th April Evening Slot
The number of P $$-$$ O bonds in P4O6 is :
JEE Main 2018 (Online) 15th April Evening Slot
In KO2, the nature of oxygen species and the oxydation state of oxygen atom are, respectively :
JEE Main 2018 (Online) 15th April Evening Slot
Lithium aluminium hydride reacts with silicon tetrachloride to form :
JEE Main 2018 (Online) 15th April Evening Slot
In XeO3F2, the number of bond pair(s), $$\pi $$-bond(s) and lone pair(s) on Xe atom respectively are :
JEE Main 2018 (Online) 15th April Morning Slot
In graphite and diamond, the percentage of p-characters of the hybrid orbitals in hybridisation are respectively :
JEE Main 2018 (Online) 15th April Morning Slot
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aformention...
JEE Main 2018 (Online) 15th April Morning Slot
Xenon hexafluoride on partial hydrolysis produces compounds 'X' and 'Y' . Compounds 'X' and 'Y' and the oxidation state of Xe are respectively :
JEE Main 2017 (Online) 9th April Morning Slot
XeF6 on partial hydrolysis with water produces a compound ‘X’. The same compound ‘X’ is formed when XeF6 reacts with silica. The compound ‘X’ is : ...
JEE Main 2017 (Online) 9th April Morning Slot
The number of P−OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid (H4P2O7) respectively are : ...
JEE Main 2017 (Online) 9th April Morning Slot
The correct sequence of decreasing number of $$\pi $$-bonds in the structures of H2SO3, H2SO4 and H2S2O7 is :...
JEE Main 2017 (Online) 8th April Morning Slot
A metal ‘M’ reacts with nitrogen gas to afford ‘M3N’. ‘M3N’ on heating at high temperature gives back ‘M’ and on reaction with water produces a gas ‘B...
JEE Main 2017 (Online) 8th April Morning Slot
The number of S = O and S − OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :
JEE Main 2017 (Offline)
The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are :
JEE Main 2016 (Online) 10th April Morning Slot
Aqueous solution of which salt will not contain ions with the electronic configuration 1s22s22p63s23p6 ?...
JEE Main 2016 (Online) 10th April Morning Slot
Assertion :     Among the carbon allotropes, diamond is an insulator, whereas, graphite is a good conductor of electricity. Reason...
JEE Main 2016 (Online) 10th April Morning Slot
Identify the incorrect statement :
JEE Main 2016 (Online) 9th April Morning Slot
Which intermolecular force is most responsible in allowing xenon gas to liquefy?
JEE Main 2016 (Online) 9th April Morning Slot
The non-metal that does not exhibit positive oxidation state is :
JEE Main 2016 (Online) 9th April Morning Slot
Match the items in Column I with its main use listed in Column II : .tg {border-collapse:collapse;border-spacing:0;border-color:#999;width:100%} .tg...
JEE Main 2016 (Offline)
The pair in which phosphorous atoms have a formal oxidation state of +3 is :
JEE Main 2015 (Offline)
Which among the following is the most reactive?
JEE Main 2015 (Offline)
Which one has the highest boiling point?
JEE Main 2015 (Offline)
Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction bet...
JEE Main 2014 (Offline)
Among the following oxoacids, the correct decreasing order of acid strength is :
JEE Main 2014 (Offline)
Which one of the following properties is not shown by NO?
JEE Main 2014 (Offline)
The correct statement for the molecule, CsI3 is :
AIEEE 2012
The molecule having smallest bond angle is :
AIEEE 2011
Which of the following statement is wrong?
AIEEE 2011
Which of the following statements regarding sulphur is incorrect?
AIEEE 2011
Boron cannot form which one of the following anions?
AIEEE 2009
Which one of the following reactions of Xenon compounds is not feasible?
AIEEE 2008
Which one of the following is the correct statement?
AIEEE 2008
Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is :
AIEEE 2007
Regular use of which of the following fertilizer increases the acidity of soil?
AIEEE 2007
Identify the incorrect statement among the following :
AIEEE 2007
The stability of dihalides of $$Si,Ge,Sn$$ and $$Pb$$ increases steadily in the sequence :
AIEEE 2006
Which of the following statements is true?
AIEEE 2006
What products are expected from the disproportionation reaction of hypochlorous acid?
AIEEE 2005
The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is :
AIEEE 2005
The correct order of the thermal stability of hydrogen halides (H – X) is :
AIEEE 2005
In silicon dioxide :
AIEEE 2005
Heating an aqueous solution of aluminium chloride to dryness will give :
AIEEE 2005
The structure of diborane (B2H6) contains :
AIEEE 2004
Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in :
AIEEE 2004
Which one the following statement regarding helium is incorrect?
AIEEE 2004
Which among the following factors is the most important in making fluorine the strongest oxidizing halogen?
AIEEE 2004
Aluminium chloride exists as dimer, Al2Cl6 in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gi...
AIEEE 2004
The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White m...
AIEEE 2003
Which one of the following substances has the highest proton affinity?
AIEEE 2003
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite :
AIEEE 2003
What may be expected to happen when phosphine gas is mixed with chlorine gas?
AIEEE 2003
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that :
AIEEE 2003
Glass is a :
AIEEE 2002
In XeF2, XeF4, XeF6 the number of lone pairs of Xe are respectively :
AIEEE 2002
Number of sigma bonds in P4O10 is :
AIEEE 2002
In case of nitrogen, NCl3 is possible but not NCl5 while in case of phosphorous, PCl3 as well as PCl5 are possible. It is due to :...
AIEEE 2002
Oxidation number of Cl in CaOCl2 (bleaching powder) is :
AIEEE 2002
When H2S is passed through Hg2S we get :

Numerical

JEE Main 2024 (Online) 1st February Morning Shift
The number of white coloured salts, among the following is (a) $\mathrm{SrSO}_4$ (b) $\mathrm{Mg}\left(\mathrm{NH}_4\right) \mathrm{PO}_4$ (c) $\mathr...
JEE Main 2024 (Online) 1st February Morning Shift
Among the following oxides of p-block elements, number of oxides having amphoteric nature is ________.$\mathrm{Cl}_2 \mathrm{O}_7, \mathrm{CO}, \mathr...
JEE Main 2024 (Online) 27th January Evening Shift
1 mole of $$\mathrm{PbS}$$ is oxidised by "$$\mathrm{X}$$" moles of $$\mathrm{O}_3$$ to get "$$\mathrm{Y}$$" moles of $$\mathrm{O}_2$$. $$\mathrm{X}+\...
JEE Main 2024 (Online) 27th January Morning Shift
From the given list, the number of compounds with +4 oxidation state of Sulphur ________. $$\mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{SOCl}_2...
JEE Main 2023 (Online) 13th April Evening Shift
If the formula of Borax is $$\mathrm{Na_2B_4O_x(OH)_y~.~zH_2O}$$, then $$x+y+z=$$ ___________
JEE Main 2023 (Online) 10th April Evening Shift
The difference in the oxidation state of $$\mathrm{Xe}$$ between the oxidised product of $$\mathrm{Xe}$$ formed on complete hydrolysis of $$\mathrm{Xe...
JEE Main 2023 (Online) 10th April Morning Shift
In the following reactions, the total number of oxygen atoms in X and Y is ___________. Na$$_2$$O + H$$_2$$O $$\to$$ 2X Cl$$_2$$O$$_7$$ + H$$_2$$O $$\...
JEE Main 2023 (Online) 8th April Evening Shift
The ratio of sigma and $$\pi$$ bonds present in pyrophosphoric acid is ___________.
JEE Main 2023 (Online) 8th April Morning Shift
$$\mathrm{XeF}_{4}$$ reacts with $$\mathrm{SbF}_{5}$$ to form $$[\mathrm{XeF}_{m}]^{\mathrm{n}+}\left[\mathrm{SbF}_{y}\right]^{z-}$$. $$\mathrm{m}+\ma...
JEE Main 2023 (Online) 24th January Evening Shift
Sum of $$\pi$$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is ___________
JEE Main 2022 (Online) 29th July Evening Shift
Consider the following sulphur based oxoacids. $$\mathrm{H}_{2} \mathrm{SO}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{H}_{2} \mathrm{S}_{2} \mathrm...
JEE Main 2022 (Online) 26th July Evening Shift
The number of non-ionisable protons present in the product B obtained from the following reactions is ___________. $$ \mathrm{C}_{2} \mathrm{H}_{5} \m...
JEE Main 2022 (Online) 25th June Evening Shift
Consider the following reactions: PCl3 + H2O $$\to$$ A + HCl A + H2O $$\to$$ B + HCl The number of ionisable protons present in the product B is _____...
JEE Main 2021 (Online) 31st August Morning Shift
Consider the sulphides HgS, PbS, CuS, Sb2S3, As2S3 and CdS. Number of these sulphides soluble in 50% HNO3 is ___________....
JEE Main 2021 (Online) 31st August Morning Shift
The number of halogen/(s) forming halic (V) acid is ___________.
JEE Main 2021 (Online) 18th March Evening Shift
A xenon compound 'A' upon partial hydrolysis gives XeO2F2. The number of lone pair of electrons present in compound A is _________. (Round off to the ...
JEE Main 2021 (Online) 17th March Morning Shift
The reaction of white phosphorus on boiling with alkali in inert atmosphere resulted in the formation of product 'A'. The reaction of 1 mol of 'A' wit...
JEE Main 2021 (Online) 24th February Evening Shift
Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is _________.(A) $$\alpha$$-sulphur(B) ...
JEE Main 2021 (Online) 24th February Morning Shift
The reaction of sulphur in alkaline medium is given below: The values of 'a' is _______. (Integer answer)...

MCQ (More than One Correct Answer)

JEE Main 2013 (Offline)
Which of the following is the wrong statement?
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