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JEE Main

d and f Block Elements

Chemistry

Previous Years Questions

MCQ (Single Correct Answer)

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Which of the following $$3\mathrm{d}$$-metal ion will give the lowest enthalpy of hydration $$\left(\Delta_{\text {hyd }...
JEE Main 2022 (Online) 29th July Evening Shift
Given below are two statements. Statement I : Stannane is an example of a molecular hydride. Statement II : Stannane is ...
JEE Main 2022 (Online) 29th July Evening Shift
In liquation process used for tin (Sn), the metal
JEE Main 2022 (Online) 29th July Evening Shift
In following pairs, the one in which both transition metal ions are colourless is :
JEE Main 2022 (Online) 29th July Morning Shift
Concentrated $$\mathrm{HNO}_{3}$$ reacts with Iodine to give
JEE Main 2022 (Online) 28th July Evening Shift
For kinetic study of the reaction of iodide ion with $$\mathrm{H}_{2} \mathrm{O}_{2}$$ at room temperature : (A) Always ...
JEE Main 2022 (Online) 28th July Morning Shift
Which of the following has least tendency to liberate $$\mathrm{H}_{2}$$ from mineral acids?
JEE Main 2022 (Online) 28th July Morning Shift
Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:sol...
JEE Main 2022 (Online) 27th July Morning Shift
Given below are two statements. Statement I: Iron (III) catalyst, acidified $$\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_...
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: Fines...
JEE Main 2022 (Online) 26th July Evening Shift
Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be...
JEE Main 2022 (Online) 24th June Evening Shift
Among the following, which is the strongest oxidizing agent?
JEE Main 2022 (Online) 25th June Morning Shift
Cerium (IV) has a noble gas configuration. Which of the following is correct statement about it?
JEE Main 2022 (Online) 25th June Morning Shift
During halogen test, sodium fusion extract is boiled with concentrated HNO3 to
JEE Main 2022 (Online) 25th June Evening Shift
The metal ion (in gaseous state) with lowest spin-only magnetic moment value is
JEE Main 2022 (Online) 25th June Evening Shift
The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3...
JEE Main 2022 (Online) 26th June Evening Shift
The 'f' orbitals are half and completely filled, respectively in lanthanide ions [Given : Atomic no. Eu, 63; Sm, 62; Tm,...
JEE Main 2022 (Online) 27th June Evening Shift
Which one of the lanthanoids given below is the most stable in divalent form?
JEE Main 2022 (Online) 28th June Morning 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 deposition of X and Y on ground surfaces is referred as wet and dry depositions, respectively. X and Y are :
JEE Main 2021 (Online) 31st August Evening Shift
In the structure of the dichromate ion, there is a :
JEE Main 2021 (Online) 31st August Morning Shift
Which one of the following metals forms interstitial hydride easily?
JEE Main 2021 (Online) 25th July Evening Shift
The correct order of following 3d metal oxides, according to their oxidation numbers is :(a) CrO3, (b) Fe2O3, (c) MnO2, ...
JEE Main 2021 (Online) 25th July Morning Shift
Cu2+ salt reacts with potassium iodide to give
JEE Main 2021 (Online) 20th July Evening Shift
The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO4 . 5H2O, respectively, are :...
JEE Main 2021 (Online) 18th March Evening Shift
Given below are two statements :Statement I : Potassium permanganate on heating at 573K forms potassium manganate.Statem...
JEE Main 2021 (Online) 17th March Morning Shift
Which of the following is Lindlar catalyst?
JEE Main 2021 (Online) 16th March Morning Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.Assertion A : In T...
JEE Main 2021 (Online) 26th February Evening Shift
Which one of the following lanthanoids does not form MO2? [M is lanthanoid metal]
JEE Main 2021 (Online) 26th February Morning Shift
Mischmetal is an alloy consisting mainly of :
JEE Main 2020 (Online) 6th September Evening Slot
The set that contains atomic numbers of only transition elements, is :
JEE Main 2020 (Online) 6th September Morning Slot
The lanthanoid that does NOT show +4 oxidation state is :
JEE Main 2020 (Online) 6th September Morning Slot
5 g of zinc is treated separately with an excess of (a) dilute hydrochloric acid and (b) aqueous sodium hydroxide. The r...
JEE Main 2020 (Online) 9th January Evening Slot
When gypsum is heated to 393 K, it forms :
JEE Main 2020 (Online) 8th January Morning Slot
The maximum number of possible oxidation states of actinoides are shown by
JEE Main 2019 (Online) 9th April Evening Slot
The statement that is INCORRECT about the interstitial compounds is :
JEE Main 2019 (Online) 8th April Evening Slot
Chlorine on reaction with hot and concentrated sodium hydroxide give -
JEE Main 2019 (Online) 12th January Evening Slot
The hydride that is NOT electron deficient
JEE Main 2019 (Online) 11th January Evening Slot
The element that usually does NOT show variable oxidation states is :
JEE Main 2019 (Online) 11th January Morning Slot
Wilkinson catalyst is : (Et = C2H5)
JEE Main 2019 (Online) 10th January Morning Slot
Hall- Heroult's process is given by
JEE Main 2019 (Online) 10th January Morning Slot
The transition element that has lowest enthalpy of atomisation, is :
JEE Main 2019 (Online) 9th January Evening Slot
When XO2 is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO3 ; a dark green product ...
JEE Main 2018 (Online) 16th April Morning Slot
The incorrect statement is :
JEE Main 2018 (Online) 16th April Morning Slot
Which of the following ions does not liberate hydrogen gas on reaction with dilute acids ?
JEE Main 2017 (Online) 9th April Morning Slot
In the following reactions, ZnO is respectively acting as a/an: (a) ZnO + Na2O $$\to$$ Na2ZnO2 (b) ZnO + CO2 $$\to$$ ZnC...
JEE Main 2017 (Offline)
The transition metal ions responsible for color in ruby and emerald are, respectively :
JEE Main 2016 (Online) 10th April Morning Slot
Which one of the following species is stable in aqueous solution ?
JEE Main 2016 (Online) 9th April Morning Slot
Which of the following compounds is metallic and ferromagnetic ?
JEE Main 2016 (Offline)
Match the catalysts to the correct processes : .tg {border-collapse:collapse;border-spacing:0;border:none;border-color...
JEE Main 2015 (Offline)
Which series of reactions correctly represents chemical relations related to iron and its compound ?
JEE Main 2014 (Offline)
Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is ...
JEE Main 2013 (Offline)
Which of the following arrangements does not represent the correct order of the property stated against it ?
JEE Main 2013 (Offline)
Iron exhibits + 2 and +3 oxidation states. Which of the following statements about iron is incorrect ?
AIEEE 2012
The outer electron configuration of $$Gd$$ (Atomic No. $$64$$) is :
AIEEE 2011
In context of the lanthanoids, which of the following statements is not correct ?
AIEEE 2011
In context with the transition elements, which of the following statements is incorrect ?
AIEEE 2009
Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements...
AIEEE 2009
Amount of oxalic acid present in a solution can be determined by its titration with $$KMn{O_4}$$ solution in the presen...
AIEEE 2008
Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being
AIEEE 2008
The stability of dihalides of $$Si,Ge,Sn$$ and $$Pb$$ increases steadily in the sequence
AIEEE 2007
The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because
AIEEE 2007
Identify the incorrect statement among the following
AIEEE 2007
A metal, $$M$$ forms chlorides in its $$+2$$ and $$+4$$ oxidation states. Which of the following statements about these ...
AIEEE 2006
Lanthanoid contraction is caused due to
AIEEE 2006
Calomel $$\left( {H{g_2}C{l_2}} \right)$$ on reaction with ammonium hydroxide gives
AIEEE 2005
Heating mixture of $$C{u_2}O$$ and $$C{u_2}S$$ will give
AIEEE 2005
The oxidation state of chromium in the final product formed the reaction between $$K{\rm I}$$ and acidified potassium di...
AIEEE 2005
Which of the following factors may be regarded as the main cause of lanthanide contraction?
AIEEE 2005
The lanthanide contraction is responsible for the fact that
AIEEE 2005
The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin butt...
AIEEE 2004
Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?...
AIEEE 2004
Cerium (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?
AIEEE 2004
A red solid is insolvable in water. However it becomes soluble if some $$K{\rm I}$$ is added to water. Heating the red s...
AIEEE 2003
The radius of La3+ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the ...
AIEEE 2003
The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Whic...
AIEEE 2003
Which one of the following nitrates will leave behind a metal on strong heating?
AIEEE 2003
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
AIEEE 2003
The type isomerism present in nitropentammine chromium $$\left( {{\rm I}{\rm I}{\rm I}} \right)$$ chloride is
AIEEE 2002
How do we differentiate between Fe3+ and Cr3+ in group III?
AIEEE 2002
Which of the following ions has the maximum magnetic moment ?
AIEEE 2002
Most common oxidation states of Ce (cerium) are
AIEEE 2002
When KMnO4 acts as an oxidising agent and ultimately forms [MnO4]-2, MnO2, Mn2O3, Mn+2 then the number of electrons tran...
AIEEE 2002

Numerical

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Among Co3+, Ti2+, V2+ and Cr2+ ions, one if used as a reagent cannot liberate H2 from dilute mineral acid solution, its ...
JEE Main 2022 (Online) 25th July Morning Shift
Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it for...
JEE Main 2022 (Online) 24th June Evening Shift
The spin-only magnetic moment value of the most basic oxide of vanadium among V2O3, V2O4 and V2O5 is _____________ B.M. ...
JEE Main 2022 (Online) 26th June Morning Shift
The number of statements correct from the following for Copper (at. no. 29) is/are ____________. (A) Cu(II) complexes ar...
JEE Main 2022 (Online) 27th June Morning Shift
For the reaction given below : CoCl3 . x NH3 + AgNO3 (aq) $$\to$$ If two equivalents of AgCl precipitate out, then the v...
JEE Main 2022 (Online) 29th June Evening Shift
An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the produc...
JEE Main 2022 (Online) 29th June Morning Shift
The number of terminal oxygen atoms present in the product B obtained from the following reaction is _____________. FeCr...
JEE Main 2022 (Online) 29th June Morning Shift
The number of halogen/(s) forming halic (V) acid is ___________.
JEE Main 2021 (Online) 31st August Morning Shift
A xenon compound 'A' upon partial hydrolysis gives XeO2F2. The number of lone pair of electrons present in compound A is...
JEE Main 2021 (Online) 18th March Evening Shift
Consider the following reactions : $$NaCl{\rm{ }} + {\rm{ }}{K_2}C{r_2}{O_7} + \mathop {{H_2}S{O_4}}\limits_{(conc.)} $$...
JEE Main 2020 (Online) 7th January Evening Slot

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