Question

Give reason for the followings:
(i) Light is not considered as matter.
(ii)Diffusion in liquids decreases with density.
(iii)Evaporation of liquid is a surface phenomenon
(iv)You feel cool when you touch a piece of ice.
(v) Ice cream appears cooler to the teeth than ice-cold water.

Answer 1

Answer:

your answer is :

Explanation:

1. to be considered matter one thing must have resting mass and volume which light doesn't has so it's not a matter.
2. sorry didn't get this answer
3. it is because it relies on the exchange of energy from the air molecules and surface molecules of the liquid.
4. We feel cold on touching the ice because the heat from our body being higher in amount moves to the ice through our skin (by thermal condition ) in order to attain thermal equilibrium between the ice and the body.
5. Ice cream appears more cooler to the teeth than the water at zero degrees Celsius because ice cream absorbs latent heat as well as the heat energy in order to attain room temperature. ... Thus, water absorbs less amount of energy from the mouth as compared to ice cream.

hope it helps you

and can I be marked as brainliest?

Answer 2

Answer:

i) Light is not considered as matter.

• Light is not considered matter because, light is just a form of energy. It neither occupies space (no volume), nor does it have any mass, which are the two essential characteristics of matter.

(ii)Diffusion in liquids decreases with density.

• Rate of diffusion increases with increase in temperature due to increase in kinetic energy of the particles.
• Rate of diffusion is more for a liquid having lower density.

(iii)Evaporation of liquid is a surface phenomenon

• Evaporation is called a surface phenomenon because it relies on the exchange of energy from the air molecules and the surface molecules of the liquid. When air molecules collide with the surface molecules of the liquid, they can impart energy that the surface molecules can use to undergo the phase change.

(iv)You feel cool when you touch a piece of ice.

• We feel cold when we touch an object or matter like ice at a lower temperature than our body temperature. This is because the heat from our body being higher in amount moves to the ice through our skin(by thermal conduction) in order to attain thermal equilibrium between the ice and the body.

( v)Ice cream appears cooler to the teeth than ice-cold water.

• Compare to cold water, ice cream appears cooler to the teeth because it has more "latent heat of vaporization" than ice cold water. Explanation: Since, ice cream has more latent heat so it will absorb more heat from teeth. Overall it makes teeth feel colder than ice cold water