Chemistry Question Bank

Water gas is produced by (AIPMT 1992)

Hydrogen peroxide molecules are (AIPMT 1991)

One would expect proton to have very large (AIPMT 1993)

When CO2 is bubbled through a solution of barium peroxide in water

Which of the following metals evolves hydrogen on reacting with cold dilute HNO3? (AIPMT 1989)

The ionization of hydrogen atom would give rise to (AIPMT 1990)

The O – O – H bond angle in H2O2(g) is about (AIPMT 1994)

The temporary hardness of water due to calcium bicarbonate can be removed by adding

The formula for permutit or zeolite which is used as softener in ion-exchange method is

Which of the following is not a disadvantage of using hard water?

The formula of exhausted permutit is

A water sample is said to contain permanent hardness if water contains

Which of the following is a true structure of H2O2 in solid phase ? (a) (b) (c) (d)

Which of the following groups of ions makes the water hard? (AIPMT 1994)

Which of the following reactions shows reduction of water ?

Temporary hardness of water is due to the presence of

Presence of water can be detected by

The exhausted cation and anion exchange resin beds are regenerated by treatment with

Liquid water is denser than ice due to

Which gas is produced when calcium nitride (Ca3N2) is hydrolysed by water?

Given below are two reactions of water with sodium and carbon dioxide. What is the nature of water in these reactions? (i) 2Na + 2H2O -> 2NaOH + H2 (ii) 6CO2 + 12H2O -> C6H12O6 + 6H2O + 6O2

Which of the following compounds is used for water softening? (a) Ca PO (b) Na PO (c) Na P O (d) Na HPO

In which of the following reactions H2O acts as a bronsted acid? (a) 3 aq aq 4 aq H O NH OH NH l (b) aq aq aq H O H S H O HS l (c) aq aq H O H O H O OH l l (d) aq aq H OH H O ( ) ( ) l

Water plays a key role in the biosphere. It is due to certain properties of H2O as compared to other liquids. Which of these is not a correct property of water?

How many hydrogen bonded water molecules are associated with CuSO4.5H2O?