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 : Heat stored in water vapour is:

Option 1: Specific heat

Option 2: Latent heat

Option 3: Absolute heat

Option 4: Relative heat

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 : 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 amount of heat that is produced in a wire when an electric current passes through it does not depend on _________.

Option 1: material

Option 2: length

Option 3: thickness

Option 4: none of these