When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give the chemical equation of this reaction

Why does the reaction rate of a reaction increase on raising the temperature?

Define combination reaction. Give one example for an exothermic combination reaction.

Differentiate reversible and irreversible reactions.

Define pH.

What is called universal pH indicator?

Powdered calcium carbonate reacts more readily with hydrochloric acid than marble chips. Give reasons.

Define irreversible reaction.

Define equilibrium state.

A strip of a metal X is immersed in the aqueous solution of salt YSO₄ blue in colour. After sometime, a layer the metal Y from the salt solution is deposited on the strip of the metal X. Whereas the metal X is used for galvanisation, the metal Y is employed in making electric cables.
i) Predict the metal X.
ii) What could be the metal Y?
iii) Can you name the salt YSO₄?
iv) What is the nature of the chemical reaction taking place?