Describe the industrial applications of hydrogen which depend on the heat liberated when its atoms are made to combine on the surface of a metal,

Describe the industrial applications of hydrogen which depend on its ability to combine with nitrogen under specific conditions.

Describe the industrial applications of hydrogen which depend on its effect on unsaturated organic systems in the presence of a catalyst,

Hydrogen gas is not liberated when the following metal is added to dil. HCl :

Name two factors on which the heat energy liberated by a body depends.

Valency is the number of hydrogen atoms which can combine with (or displace) one atom of the element (or radical] forming a compound'. With reference to the above definition of valency, state the valency of chlorine in hydrogen chloride, giving reasons.

Among statements (a)-(d), the correct ones are : (a) Decomposition of hydrogen peroxide gives dioxygen. (b) Like hydrogen peroxide, compounds, such as KClO_(3), Pb(NO_(3))_(2) and NaNO_(3) when heated liberate dioxygen. (c) 2-Ethylanthraquinol is useful for the industrial preparation of hydrogen peroxide. (d) Hydrogen peroxide is used for the manufacture of sodium perborate.

When hydrogen atom is in its first excited level, its radius is

Which of the following metals does not liberate hydrogen from acids?

When a strong acid, strong base or their salt are dissolved in water, they are completely ionised. If a strong acid is added to a strong base, H^(+) ions from the former combine with OH^(-) ions of the latter forming water. The formation of each water molecule liberates a certain quantity of energy and the reaction is exothermic. The heat liberated when one mole of water is formed by combining hydrochloric acid sodium hydroxide is 13.7 kcal. The heat liberated when one mole of water is formed by combining sulphuic acid and sodium hydroxide is