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JEE Main

p-Block Elements

Chemistry

Previous Years Questions

MCQ (Single Correct Answer)

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Dinitrogen is a robust compound, but reacts at high altitudes to form oxides. The oxide of nitrogen that can damage plan...
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
The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives :
JEE Main 2022 (Online) 29th July Morning Shift
Dinitrogen and dioxygen, the main constituents of air do not react with each other in atmosphere to form oxides of nitr...
JEE Main 2022 (Online) 28th July Evening Shift
White phosphorus reacts with thionyl chloride to give
JEE Main 2022 (Online) 28th July Evening Shift
Match List - I with List - II, match the gas evolved during each reaction. .tg {border-collapse:collapse;border-spacin...
JEE Main 2022 (Online) 28th July Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)...
JEE Main 2022 (Online) 27th July Evening Shift
Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?
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 struct...
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 : Acti...
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 : Boric...
JEE Main 2022 (Online) 26th July Evening Shift
Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "$$X$$" with 6-equivalent...
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...
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:sol...
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
The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :
JEE Main 2022 (Online) 25th July Morning Shift
The geometry around boron in the product 'B' formed from the following reaction is $$ \begin{gathered} \mathrm{BF}_{3}+\...
JEE Main 2022 (Online) 25th July Morning Shift
A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}^{573\,K}} $$ Red phosphorus $$\mathrel{\mathop{\kern0pt\longrig...
JEE Main 2022 (Online) 30th June Morning Shift
Which one of the following elemental forms is not present in the enamel of the teeth?
JEE Main 2022 (Online) 24th June Morning Shift
The most stable trihalide of nitrogen is :
JEE Main 2022 (Online) 24th June Morning Shift
Given below are the oxides: Na2O, As2O3, N2O, NO and Cl2O7 Number of amphoteric oxides is :...
JEE Main 2022 (Online) 24th June Morning Shift
PCl5 is well known, but NCl5 is not. because,
JEE Main 2022 (Online) 24th June Evening Shift
White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :
JEE Main 2022 (Online) 25th June Morning Shift
The number of bridged oxygen atoms present in compound B formed from the following reactions is Pb(NO3)2 $$\buildrel {67...
JEE Main 2022 (Online) 25th June Evening Shift
The oxide which contains an odd electron at the nitrogen atom is
JEE Main 2022 (Online) 26th June Evening Shift
Which of the following elements is considered as a metalloid?
JEE Main 2022 (Online) 26th June Evening Shift
Consider the following reaction : A + alkali $$\to$$ B (Major Product) If B is an oxoacid of phosphorus with no P-H bond...
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
Choose the correct stability order of group 13 elements in their + 1 oxidation state.
JEE Main 2022 (Online) 26th June Morning Shift
Heating white phosphorus with conc. NaOH solution gives mainly:
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...
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:sol...
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 : Flu...
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 : Statement I : The pentavalent oxide of group-15 element, E2O5, is less acidic than triv...
JEE Main 2022 (Online) 28th June Morning Shift
Nitrogen gas is obtained by thermal decomposition of
JEE Main 2022 (Online) 28th June Morning Shift
Which of the following oxoacids of sulphur contains "S" in two different oxidation states?
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
Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-styl...
JEE Main 2022 (Online) 28th June Evening Shift
A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas 'X' with chara...
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 ...
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
The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, ...
JEE Main 2022 (Online) 29th June Morning Shift
The oxide without nitrogen-nitrogen bond is :
JEE Main 2021 (Online) 1st September Evening Shift
The number of S = O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :
JEE Main 2021 (Online) 31st 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 Evening Shift
In polythionic acid, H2SxO6 (x = 3 to 5) the oxidation state(s) of sulphur is/are :
JEE Main 2021 (Online) 27th August Morning 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
The conversion of hydroxyapatite occurs due to presence of F$$-$$ ions in water. The correct formula of hydroxyapatite i...
JEE Main 2021 (Online) 26th August Morning Shift
Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are :
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...
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...
JEE Main 2021 (Online) 27th July Evening Shift
The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :
JEE Main 2021 (Online) 27th July Morning Shift
Which one of the following group-15 hydride is the strongest reducing agent?
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 at...
JEE Main 2021 (Online) 22th July Evening Shift
Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and P4O10 (in 4 : 1 ...
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
The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphon...
JEE Main 2021 (Online) 18th March Morning Shift
Match List - I with List - II List - I(process) List - II(catalyst) (a) Deacron's ...
JEE Main 2021 (Online) 18th March Morning Shift
Reagent, 1-napthylamine and sulphanilic acid in acetic acid is used for the detection of
JEE Main 2021 (Online) 18th March Morning Shift
The INCORRECT statement regarding the structure of C60 is :
JEE Main 2021 (Online) 16th March Evening Shift
Match List - I with List - II : List - I Name of oxo acid List - II Oxidation state of 'P' ...
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 e...
JEE Main 2021 (Online) 16th March Morning Shift
Match List - I with List - II : List - IIndustrial process List - IIApplication (a) ...
JEE Main 2021 (Online) 16th March Morning Shift
Which pair of oxides is acidic in nature?
JEE Main 2021 (Online) 26th February Evening 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}$$$${(N{H_4})_2}C{O_3} + {H_2}O ...
JEE Main 2021 (Online) 26th February Morning Shift
Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens...
JEE Main 2021 (Online) 25th February Evening Shift
Given below are two statements :Statement I : $$\alpha$$ and $$\beta$$ forms of sulphur can change reversibly between th...
JEE Main 2021 (Online) 25th February Evening Shift
The correct statement about B2H6 is :
JEE Main 2021 (Online) 25th February Morning Slot
Reaction of an inorganic sulphite X with dilute H2SO4 generates compound Y. Reaction of Y with NaOH gives X. Further, th...
JEE Main 2020 (Online) 6th September Evening Slot
The reaction of NO with N2O4 at 250 K gives :
JEE Main 2020 (Online) 6th September Evening Slot
The correct statement with respect to dinitrogen is :
JEE Main 2020 (Online) 6th September Morning Slot
Reaction of ammonia with excess Cl2 gives :
JEE Main 2020 (Online) 5th September Evening Slot
Boron and silicon of very high purity can be obtained through :
JEE Main 2020 (Online) 5th September Evening Slot
On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B...
JEE Main 2020 (Online) 4th September Morning Slot
In a molecule of pyrophosphoric acid, the number of P - OH, P = O and P - O - P bonds/moiety(ies) respectively are :
JEE Main 2020 (Online) 3rd September Morning Slot
Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is :
JEE Main 2020 (Online) 3rd September Morning Slot
On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2 in the presence of ...
JEE Main 2020 (Online) 2nd September Morning Slot
White Phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound ...
JEE Main 2020 (Online) 8th January Evening Slot
A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H2O gives a colourless gas which when passe...
JEE Main 2020 (Online) 8th January Evening Slot
In the following reaction products (A) and (B) respectively, are : NaOH + Cl2 $$ \to $$ (A) + side products (hot and con...
JEE Main 2020 (Online) 7th January Evening Slot
The C–C bond length is maximum in :
JEE Main 2019 (Online) 12th April Evening Slot
The basic structural unit of feldspar, zeolites, mica, and asbestos is :
JEE Main 2019 (Online) 12th April Morning Slot
The number of pentagons in C60 and trigons (triangles) in white phosphorus, respectively, are :
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 correct statements among I to III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (II) Oxides o...
JEE Main 2019 (Online) 9th April Evening Slot
The amorphous form of silica is :
JEE Main 2019 (Online) 9th April Evening Slot
C60, an allotrope of carbon contains :
JEE Main 2019 (Online) 9th April Morning Slot
Diborane (B2H6) reacts with O2 and H2O independently, then products formed are...
JEE Main 2019 (Online) 8th April Morning Slot
The element that does NOT show catenation is -
JEE Main 2019 (Online) 12th January Evening 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) 12th January Morning Slot
The chloride that CANNOT get hydrolysed is :
JEE Main 2019 (Online) 11th January Morning Slot
Among the following reactions of hydrogen with halogens, the one that requires a catalyst is
JEE Main 2019 (Online) 10th January Evening Slot
Good reducing nature of H3PO2 is attributed to the presence of :
JEE Main 2019 (Online) 9th January Evening Slot
The one that is extensively used as a piezoelectric material is :
JEE Main 2019 (Online) 9th January Morning Slot
Correct statements among a to d regarding silicones are : (a)   They are polymers with hydrophobic chara...
JEE Main 2019 (Online) 9th January Morning Slot
A group 13 element 'X' reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts...
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
In XeO3F2, the number of bond pair(s), $$\pi $$-bond(s) and lone pair(s) on Xe atom respectively are : ...
JEE Main 2018 (Online) 15th April Evening Slot
In KO2, the nature of oxygen species and the oxydation state of oxygen atom are, respectively :
JEE Main 2018 (Online) 15th April Evening Slot
For per gram of reactant, the maximum quantity of N2 gas is produced in which of the following thermal decomposition rea...
JEE Main 2018 (Online) 15th April Evening Slot
Xenon hexafluoride on partial hydrolysis produces compounds 'X' and 'Y' . Compounds 'X' and 'Y' and the oxidation state ...
JEE Main 2018 (Online) 15th April Morning Slot
In graphite and diamond, the percentage of p-characters of the hybrid orbitals in hybridisation are respectively :
JEE Main 2018 (Online) 15th April Morning Slot
The compound that does not produce nitrogen gas by the thermal decomposition is
JEE Main 2018 (Offline)
The correct sequence of decreasing number of $$\pi $$-bonds in the structures of H2SO3, H2SO4 and H2S2O7 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
XeF6 on partial hydrolysis with water produces a compound ‘X’. The same compound ‘X’ is formed when XeF6 reacts with si...
JEE Main 2017 (Online) 9th April Morning Slot
The number of S = O and S − OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :
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 reactio...
JEE Main 2017 (Online) 8th April Morning Slot
The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are:
JEE Main 2017 (Offline)
Identify the incorrect statement :
JEE Main 2016 (Online) 10th April Morning Slot
Assertion :     Among the carbon allotropes, diamond is an insulator, whereas, graphite is a good co...
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
Match the items in Column I with its main use listed in Column II : .tg {border-collapse:collapse;border-spacing:0;bor...
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
Which intermolecular force is most responsible in allowing xenon gas to liquefy ?
JEE Main 2016 (Online) 9th April Morning Slot
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:
JEE Main 2016 (Offline)
The pair in which phosphorous atoms have a formal oxidation state of +3 is:
JEE Main 2016 (Offline)
Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitro...
JEE Main 2015 (Offline)
Which one has the highest boiling point?
JEE Main 2015 (Offline)
Which among the following is the most reactive?
JEE Main 2015 (Offline)
The correct statement for the molecule, CsI3 is:
JEE Main 2014 (Offline)
Which one of the following properties is not shown by NO?
JEE Main 2014 (Offline)
Among the following oxoacids, the correct decreasing order of acid strength is
JEE Main 2014 (Offline)
The molecule having smallest bond angle is :
AIEEE 2012
Boron cannot form which one of the following anions ?
AIEEE 2011
Which of the following statements regarding sulphur is incorrect ?
AIEEE 2011
Which of the following statement is wrong ?
AIEEE 2011
Which one of the following reactions of Xenon compounds is not feasible ?
AIEEE 2009
Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is
AIEEE 2008
Which one of the following is the correct statement?
AIEEE 2008
Identify the incorrect statement among the following
AIEEE 2007
Regular use of which of the following fertilizer increases the acidity of soil?
AIEEE 2007
What products are expected from the disproportionation reaction of hypochlorous acid?
AIEEE 2006
Which of the following statements is true?
AIEEE 2006
The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is
AIEEE 2006
The structure of diborane (B2H6) contains
AIEEE 2005
Heating an aqueous solution of aluminium chloride to dryness will give
AIEEE 2005
In silicon dioxide
AIEEE 2005
The correct order of the thermal stability of hydrogen halides (H – X) is
AIEEE 2005
The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is
AIEEE 2005
Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statements is incorrect f...
AIEEE 2004
Aluminium chloride exists as dimer, Al2Cl6 in solid state as well as in solution of non-polar solvents such as benzene. ...
AIEEE 2004
Which among the following factors is the most important in making fluorine the strongest oxidizing halogen?
AIEEE 2004
Which one the following statement regarding helium is incorrect?
AIEEE 2004
Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in
AIEEE 2004
Which one of the following statements is correct?
AIEEE 2003
Glass is a
AIEEE 2003
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it i...
AIEEE 2003
What may be expected to happen when phosphine gas is mixed with chlorine gas?
AIEEE 2003
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite
AIEEE 2003
For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liqu...
AIEEE 2003
Which one of the following substances has the highest proton affinity?
AIEEE 2003
When H2S is passed through Hg2S we get
AIEEE 2002
Oxidation number of Cl in CaOCl2 (bleaching powder) 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 i...
AIEEE 2002
Number of sigma bonds in P4O10 is
AIEEE 2002
Which of the following statements is true ?
AIEEE 2002
In XeF2, XeF4, XeF6 the number of lone pairs of Xe are respectively
AIEEE 2002
Alum helps in purifying water by
AIEEE 2002

Numerical

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The number of non-ionisable protons present in the product B obtained from the following reactions is ___________. $$ \m...
JEE Main 2022 (Online) 26th July Evening Shift
Consider the following reactions: PCl3 + H2O $$\to$$ A + HCl A + H2O $$\to$$ B + HCl The number of ionisable protons pre...
JEE Main 2022 (Online) 25th June Evening Shift
Compound 'P' on nitration with dil. HNO3 yields two isomers (A) and (B). These isomers can be separated by steam distill...
JEE Main 2022 (Online) 26th June Morning Shift
Consider the sulphides HgS, PbS, CuS, Sb2S3, As2S3 and CdS. Number of these sulphides soluble in 50% HNO3 is ___________...
JEE Main 2021 (Online) 31st August Morning Shift
The ratio of number of water molecules in Mohr's salt and potash alum is ____________ $$\times$$ 10$$-$$1. (Integer answ...
JEE Main 2021 (Online) 26th August Morning Shift
The reaction of white phosphorus on boiling with alkali in inert atmosphere resulted in the formation of product 'A'. Th...
JEE Main 2021 (Online) 17th March Morning Shift
Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is ______...
JEE Main 2021 (Online) 24th February Evening Slot
The reaction of sulphur in alkaline medium is given below: The values of 'a' is _______. (Integer answer)...
JEE Main 2021 (Online) 24th February Morning Slot

MCQ (More than One Correct Answer)

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Which of the following is the wrong statement?
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