Chemistry Question Bank

What is structure of H2O2? (MP PMT 2010) (a)

Which of the following is responsible for the permanent hardness of water? (CPMT 2010)

Permanent hardness of water can be removed by adding (AFMC 2010)

The degree of hardness of water is usually expressed in terms of (AMU 2010)

Some statements about heavy water are given below. (i) Heavy water is used as moderator in nuclear reactors. (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than or…

How many neutrons are present in tritium nucleus? (RPMT 2006)

When CO2 is bubbled through a solution of barium peroxide in water (AFMC 2005)

The hardness of water is estimated by (Manipal 2004)

Which one of the following pairs of substances on reaction will not evolve H2 gas? (AIPMT 1998)

The volume strength of 1.5 N H2O2 solution is (AIPMT 1997)

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

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

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

Water gas is produced by (AIPMT 1992)

At its melting point, ice is lighter than water because (AIPMT 1992)

Hydrogen peroxide molecules are (AIPMT 1991)

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

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

When CO2 is bubbled through a solution of barium peroxide in 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 gas is produced when calcium nitride (Ca3N2) is hydrolysed by water?

Liquid water is denser than ice due to

The density of water is less in its solid state because

Which is not a property of water ?

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?