Give reason for: Removal of wax layer too often will raise incidence of ear infection.

Removal of was layer too often will raise incidence of ear infection - give reason.

Assertion(A) In such areas where there is no vegetation the rain water flows quickly and has no effect on the top layer of soil of that area. Reason (R) When water level raises in rivers and ponds etc. due to excessive rains it causes floods.

You have observed the difference in the shape of ear. Give reasons.

Fill in the blanks and give reasons Cleaning of water is a process of removing ____________.

Divya suggested some methods to separate mixtures given below. Are they correct?Find whether they are possible or not. Give reasons. Cheese can be removed from curdled milk by decantation.

An aqueous solution of a white salt A gives a white precipitate B on treatment with dilute HCI in cold conditions. B is soluble in boiling water. An aqueous solution of A gives a yellow precipitate on treatment with a solution of K_(2)CrO_(4) . The soda extract of A is acidified with dilute H_(2)SO_(4) boiled to remove CO_(2) and treated with a freshly prepared solution of FeSO_(4) Concentrated H_(2)SO_(4) is added to the resulting solution (along the walls of the test tube so that the H_(2)SO_(4) forms a separate layer). A brown ring is formed at the junction of the two layers. On treatment with a Kl solution, an aqueous solution of A will give

Fill in the blanks with suitable words. Then give reasons why the words are suitable. Chroid layer provides ……………… to the eye.

Fill in the Blanks and give reasons:Cleaning of water is a process of removing_____

“Sneha wanted to know why paraffin wax in a candle and the wick in a deepavali oil lamp bun with a flame.” What reason can you give ?