Question : Water is used in a hot water bag because:

Option 1: it is easily available

Option 2: it has high specific gravity

Option 3: it has high specific heat

Option 4: it is a liquid substance

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 : Pressure cooker cooks faster because:

Option 1: The boiling point decreases with the rise in pressure.

Option 2: It cooks the food at low pressure.

Option 3: A higher temperature is attained for cooking.

Option 4: The material of the cooker is a good conductor.

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