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JEE Main

Hydrogen

Chemistry

Previous Years Questions

Numerical

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On reaction with stronger oxidizing agent like $$\mathrm{KIO}_{4}$$, hydrogen peroxide oxidizes with the evolution of $...
JEE Main 2022 (Online) 28th July Evening Shift
The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide i...
JEE Main 2022 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

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The products obtained during treatment of hard water using Clark's method are :
JEE Main 2022 (Online) 28th July Evening Shift
The metal salts formed during softening of hardwater using Clark's method are :
JEE Main 2022 (Online) 28th July Morning Shift
In neutral or alkaline solution, $$\mathrm{MnO}_{4}^{-}$$ oxidises thiosulphate to :
JEE Main 2022 (Online) 27th July Evening Shift
Given below are two statements. Statement I: Hydrogen peroxide can act as an oxidizing agent in both acidic and basic co...
JEE Main 2022 (Online) 27th July Morning Shift
The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are
JEE Main 2022 (Online) 26th July Evening Shift
Which of the following can be used to prevent the decomposition of $$\mathrm{H}_{2} \mathrm{O}_{2}$$ ?
JEE Main 2022 (Online) 26th July Morning Shift
High purity (> 99.95%) dihydrogen is obtained by
JEE Main 2022 (Online) 25th July Evening Shift
The reaction of $$\mathrm{H}_{2} \mathrm{O}_{2}$$ with potassium permanganate in acidic medium leads to the formation of...
JEE Main 2022 (Online) 25th July Morning Shift
The highest industrial consumption of molecular hydrogen is to produce compounds of element :
JEE Main 2022 (Online) 24th June Morning Shift
Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesi...
JEE Main 2022 (Online) 26th June Evening Shift
Consider the following reaction: $$2HSO_4^ - (aq)\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{(2)\,Hydrolysis}^{(1...
JEE Main 2022 (Online) 26th June Morning Shift
Dihydrogen reacts with CuO to give
JEE Main 2022 (Online) 28th June Morning Shift
Hydrogen has three isotopes : protium (1H), deuterium (2H or D) and tritium (3H or T). They have nearly same chemical pr...
JEE Main 2022 (Online) 28th June Evening Shift
Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium?
JEE Main 2022 (Online) 29th June Morning Shift
Hydrogen peroxide reacts with iodine in basic medium to give :
JEE Main 2021 (Online) 1st September Evening Shift
Which one of the following statements is incorrect?
JEE Main 2021 (Online) 31st August Evening Shift
The oxide that gives H2O2 most readily on treatment with H2O is :
JEE Main 2021 (Online) 27th August Evening Shift
Deuterium resembles hydrogen in properties but :
JEE Main 2021 (Online) 27th August Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) ...
JEE Main 2021 (Online) 26th August Evening Shift
Which one of the following methods is most suitable for preparing deionized water?
JEE Main 2021 (Online) 26th August Morning Shift
Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?
JEE Main 2021 (Online) 26th August Morning Shift
To an aqueous solution containing ions such as Al3+, Zn2+, Ca2+, Fe3+, Ni2+, Ba2+ and Cu2+ was added conc. HCl, followed...
JEE Main 2021 (Online) 27th July Evening Shift
The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :
JEE Main 2021 (Online) 27th July Evening Shift
At 298.2 K the relationship between enthalpy of bond dissociation (in kJ mol$$-$$1) for hydrogen (EH) and its isotope, d...
JEE Main 2021 (Online) 25th July Morning Shift
The water having more dissolved O2 is :
JEE Main 2021 (Online) 22th July Evening Shift
The single largest industrial application of dihydrogen is :
JEE Main 2021 (Online) 20th July Evening Shift
Given below are two statements : One is labelled as Assertion A and other is labelled as Reason R. Assertion A : The dih...
JEE Main 2021 (Online) 20th July Morning Shift
In basic medium, H2O2 exhibits which of the following reactions?(A) Mn2+ $$ \to $$ Mn4+(B) I2 $$ \to $$ I$$-$$(C) PbS $$...
JEE Main 2021 (Online) 18th March Evening Shift
Given below are two statements : One is labelled as Assertion A and the other labelled as reason RAssertion A : During t...
JEE Main 2021 (Online) 18th March Morning Shift
The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respective...
JEE Main 2021 (Online) 17th March Evening Shift
The INCORRECT statement(s) about heavy water is (are)(A) used as a moderator in nuclear reactor(B) obtained as a by-prod...
JEE Main 2021 (Online) 17th March Morning Shift
The correct statements about H2O2 are :(A) used in the treatment of effluents.(B) used as both oxidising and reducing ag...
JEE Main 2021 (Online) 16th March Evening Shift
Given below are two statements :Statement I : H2O2 can act as both oxidising and reducing agent in basic medium.Statemen...
JEE Main 2021 (Online) 16th March Morning Shift
Statements about heavy water are given below :A. Heavy water is used in exchange reactions for the study of reaction mec...
JEE Main 2021 (Online) 26th February Morning Shift
Water does not produce CO on reacting with :
JEE Main 2021 (Online) 25th February Evening Shift
Dihydrogen of high purity (> 99.95%) is obtained through :
JEE Main 2020 (Online) 6th September Evening Slot
The one that is NOT suitable for the removal of permanent hardness of water is :
JEE Main 2020 (Online) 5th September Evening Slot
Hydrogen peroxide, in the pure state, is :
JEE Main 2020 (Online) 5th September Evening Slot
The equation that represents the water-gas shift reaction is :
JEE Main 2020 (Online) 5th September Morning Slot
If the boiling point of H2O is 373 K, the boiling point of H2S will be :
JEE Main 2020 (Online) 3rd September Morning Slot
Amongst the following, the form of water with the lowest ionic conductance at 298 K is:
JEE Main 2020 (Online) 9th January Evening Slot
Among the statements (a) - (d), the correct ones are : (a) Decomposition of hydrogen peroxide gives dioxygen. (b) Like h...
JEE Main 2020 (Online) 7th January Evening Slot
In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is :
JEE Main 2020 (Online) 7th January Morning Slot
The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, re...
JEE Main 2019 (Online) 12th April Evening Slot
The metal that gives hydrogen gas upon treatment with both acid as well as base is :
JEE Main 2019 (Online) 12th April Morning Slot
The correct statements among (a) to (d) are : (a) saline hydrides produce H2 gas when reacted with H2O. (b) reaction of ...
JEE Main 2019 (Online) 10th April Evening Slot
The synonym for water gas when used in the production of methanol is :
JEE Main 2019 (Online) 10th April Morning Slot
The number of water molecule(s) not coordinated to copper ion directly in CuSO4.5H2O, is :
JEE Main 2019 (Online) 9th April Morning Slot
The strength of 11.2 volume solution of H2O2 is : [Given that molar mass of H = 1 g mol–1 and O = 16 g mol–1]...
JEE Main 2019 (Online) 8th April Evening Slot
100 mL of a water sample contains 0.81 g of calcium bicrabonate and 0.73 g of magnesium bicarbonate. The hardness of thi...
JEE Main 2019 (Online) 8th April Morning Slot
The volume strength of 1M H2O2 is (Molar mass of H2O2 = 34 g mol–1)...
JEE Main 2019 (Online) 12th January Evening Slot
The hardness of a water sample (in terms of equivalents of CaCO3) containing 10–3 M CaSO4 is (Molar mass of CaSO4 = 136 ...
JEE Main 2019 (Online) 12th January Morning Slot
NaH is an example of :
JEE Main 2019 (Online) 11th January Morning Slot
The correct statements among (a) to (d) regarding H2 as a fuel are : (a)   It produces less pollutants th...
JEE Main 2019 (Online) 11th January Morning Slot
The chemical nature of hydrogen peroxide is :
JEE Main 2019 (Online) 10th January Morning Slot
The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are :
JEE Main 2019 (Online) 10th January Morning Slot
The temporary hardness of water is due to :
JEE Main 2019 (Online) 9th January Evening Slot
The isotopes of hydrogen are :
JEE Main 2019 (Online) 9th January Morning Slot
Hydrogen peroxide oxidises [Fe(CN)6]4- to [Fe(CN)6]3- in acidic medium but reduces [Fe(CN)6]3- to [Fe(CN)6]4- in alkalin...
JEE Main 2018 (Offline)
Identify the reaction which does not liberate hydrogen :
JEE Main 2016 (Online) 10th April Morning Slot
Identify the incorrect statement regarding heavy water :
JEE Main 2016 (Online) 9th April Morning Slot
Which one of the following statements about water is FALSE?
JEE Main 2016 (Offline)
From the following statements regarding H2O2, choose the incorrect statement:
JEE Main 2015 (Offline)
The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (Mol. Wt. 206). Wha...
JEE Main 2015 (Offline)
Very pure hydrogen (99.9%) can be made by which of the following processes ?
AIEEE 2012
In context with the industrial preparation of hydrogen from water gas (CO + H2), which of the following is the correct s...
AIEEE 2008
Which one of the following process will produce hard water?
AIEEE 2003

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