Question

With your parent's help write down the income and expenditure of your family for one week for eg- (Education, Clothes, travel, medical) ​

Answer 1

Answer:

I am sorry I cannot answer this I don't know you and therefore I don't know your family's income and expenditure. Its right there in the question that you have to write about your family's income and expenditure so you're gonna have to take your parent's help.

Step-by-step explanation:

Answer 2

Answer:

Give reason for the following observations.

(a) Naphthalene balls disappear with time leaving any solid.

(b) We can get the smell of perfume sitting several metres away.

a) Naphthalene balls disappear with time without leaving any solid.

Naphthalene undergoes sublimation easily, i.e., the change of state of naphthalene from solid to gas without the intervention of the liquid state. Thus, naphthalene balls keep forming naphthalene vapours that disappear into the air with time without leaving any soli

(b)We can get the smell of perfume sitting several metres away.

Perfume has a higher degree of vaporization

,and its vapour diffuses into the air easily. Gaseous particles possess high speed and move very rapidly in all directions. When perfume is sprayed, its particles diffuse into the air particles at a high-speed rate and reach our nostrils. This enables us to smell the perfume from a distance.