Question

plz help me tobanswer​

Answer 1

Answer:

(a) more

(b) than , other component

(c) boil

Answer 2

Answer ::

Fill in the blanks :-

1. Sand is not soluble then salt in water.
2. Solubility of sugar is more in hot water than in cold water.
3. To reverse the change of ice into water, we must heat the water.

Write the difference between physical change and chemical change.

Physical change

➳ Generally, physical change is temporary and reversible change.

➳ No new substance is formed.

➳ The physical properties of a substance change but its composition doesn't change.

➳ There is no absorption or evolution of energy.

➳ For example :-

• Freezing of water
• Ringing of an electric bulb

Chemical change

➳ Chemical change is permanent and irreversible change.

➳ New substance is formed.

➳ there is a change in physical properties as well as in the composition of substance.

➳ Absorption or evolution of energy is occured.

➳ For example :-

• Ripening of fruits
• Cooking of food.