State two ways to prevent the rusting of iron.

1. Give an example of a metal which (i) Is a liquid at room temperature? (ii) Can be easily cut with a knife? (iii) Is the best conductor of heat? (iv) Is a poor conductor of heat?

While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?

Why should curd and sour substances not be kept in brass and copper vessels?

What are alloys?

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).