Hydrogen PYQs - Last 10 Years

The INCORRECT statement(s) about heavy water is (are)(A) used as a moderator in nuclear reactor(B) obtained as a by-product in fertilizer industry(C) used for the study of reaction mechanism(D) has a higher dielectric constant than waterCho...

The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are :

Given below are two statements :Statement I : H2O2 can act as both oxidising and reducing agent in basic medium.Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen.In the light of the above statements...

The correct statements about H2O2 are :(A) used in the treatment of effluents.(B) used as both oxidising and reducing agents.(C) the two hydroxyl groups lie in the same plane.(D) miscible with water.Choose the correct answer from the option...

Amongst the following, the form of water with
the lowest ionic conductance at 298 K is :

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins
method is :

Among the statements (a) - (d), the correct ones are :
(a) Decomposition of hydrogen peroxide gives dioxygen.
(b) Like hydrogen peroxide, compounds, such as KCIO3, Pb(NO3)2 and NaNO3 when heated liberate dioxygen.
(c) 2-Ethylanthraquinone i...

Dihydrogen of high purity (> 99.95%) is
obtained through :

The equation that represents the water-gas shift
reaction is :

The one that is NOT suitable for the removal of permanent hardness of water is :

Hydrogen peroxide, in the pure state, is :

If the boiling point of H2O is 373 K, the boiling point of H2S will be :

The isotopes of hydrogen are :

The temporary hardness of water is due to :

The number of water molecule(s) not
coordinated to copper ion directly in
CuSO4.5H2O, is :

100 mL of a water sample contains 0.81 g of calcium bicrabonate and 0.73 g of magnesium
bicarbonate. The hardness of this water sample expressed in terms of equivalents of CaCO3 is :
(Molar mass of calcium bicarbonate is 162 g mol–1 and mag...

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]

The volume strength of 1M H2O2 is : (Molar mass of H2O2 = 34 g mol–1)

The metal that gives hydrogen gas upon treatment with both acid as well as base is :

The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to
compound Y. X and Y, respectively, are :

The correct statements among (a) to (d) regarding H2 as a fuel are :
(a)   It produces less pollutants than petrol.
(b)   A cylinder of compressed dihydrogen weighs \(\sim\) 30 times more than a petrol tank producing the same amount of en...

NaH is an example of :

The chemical nature of hydrogen peroxide is :

The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are :

The synonym for water gas when used in the production of methanol is :

The correct statements among (a) to (d) are :
(a) saline hydrides produce H2 gas when reacted with H2O.
(b) reaction of LiAlH4 with BF3 leads to B2H6.
(c) PH3 and CH4 are electron - rich and electron - precise hydrides, respectively.
(d) HF...

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 alkaline medium. The other products formed are, respectively :

In which of the following reactions, hydrogen peroxide acts as an oxidizing
agent ?

Identify the incorrect statement regarding heavy water :

Identify the reaction which does not liberate hydrogen :

Which one of the following statements about water is FALSE?

From the following statements regarding H2O2, choose the incorrect statement :