Question : Water is not suitable as a calorimetric substance because it:

Option 1: has high specific heat

Option 2: is a good conductor

Option 3: has high boiling water

Option 4: low latent heat of vapourisation

Question : Vegetables are cooked in less time by adding a pinch of salt while cooking because:

Option 1: boiling point of water increases

Option 2: latent heat of vaporisation of water decreases

Option 3: latent heat of vaporisation of water increases

Option 4: boiling point of water decreases

Question : When quick lime is added to water

Option 1: Heat is liberated

Option 2: Heat is absorbed

Option 3: Temperature decreases

Option 4: No heat change takes place

Question : A pressure cooker reduces cooking time because:

Option 1: the heat is more evenly distributed

Option 2: the boiling point of the water inside is elevated

Option 3: it absorbs more heat from its flame

Option 4: the higher pressure tenderises the food

Question : The characteristic invalid for heat radiation is that it travels

Option 1: in a straight line

Option 2: in all directions

Option 3: with the speed of light

Option 4: heating the medium through which it passes