TRB, TET, TNPSC Online Test - 3

Question: 11

Red, yellow and blue are known as

(A) primary colours

(B) secondary colours

(C) complementary colours

(D) primary pigments

Question: 12

The gas which had leaked out of Union arbide factory in Bhopal was

(A) sulphur dioxide

(B) methyl isocyanate

(C) carbon dioxide

(D) chlorine

Question: 13

The most contractile part of the human body is

(A) urinary bladder

(B) iris

(C) stomach

(D) skin

Question: 14

The fourth state of matter is

(A) solid

(B) liquid

(C) gas

(D) plasma

Question: 15

Ion-exchange is a process of

(A) fermentation

(B) water softening

(C) metal extraction

(D) heavy water produced