711: Gypsum is added to the soil?
(a) To increase the alkalinity
(b) To decrease the acidity
(c) To decrease the alkalinity
(d) As an insecticide
712: What is the common feature in insects like ant and cockroach?
(a) They bite and chew their food
(b) They live in temperate climate conditions
(c) They have cutting and sucking type of mouth parts
(d) They are social insects
713: Apart from Tamil Nadu (Neyveli), lignite is found at:
(a) Gujarat
(b) Uttar Pradesh
(c) West Bengal
(d) Orissa
714: Consider the following statements regarding the National Human Rights Commission of India:
I. Its Chairman must be a retired Chief Justice of India.
II. It has formations in each state as State Human Rights Commission.
III. Its powers are only recommendatory in nature.
IV. It is mandatory to appoint a woman as a member of the Commission.
Which of the above statements are correct ?
(a) I, II, III and IV
(b) II and IV
(c) II and III
(d) I and III
715: Acid rain is caused by pollution of environment by:
(a) Carbon dioxide and nitrogen
(b) Carbon monoxide and carbon dioxide
(c) Ozone and carbon dioxide
(d) Nitrous oxide and sulphur dioxide