PG TRB Model Question Paper for Home science with Answer - 3

Question: 11

Phosgene is obtained by the reaction of carbon monoxide and

(A) Phosphorous

(B) Chlorine

(C) Sulphur

(D) None of these

Question: 12

Ultrasonic sound has the frequency of

(A) Above 20,000 vibrations per sec

(B) Below 20,000 vibrations per sec

(C) Below 20 vibrations per sec

(D) None of these

Question: 13

Which type of fire extinguisher is used for petroleum fire?

(A) Soda acid type

(B) Foam type

(C) Powder type

(D) None of these

Question: 14

Camel is used its hump for

(A) Temperature regulation

(B) Storing water

(C) Balancing the body during walking in desert sand

(D) Storing fat

Question: 15

Hydrogen has ___ isotopes.

(A) 2

(B) 3

(C) 4

(D) 5