2061: Consider the following statements about acetylene :
I. It is used in welding industry.
II. It is raw material for preparing plastics.
III. It is easily obtained by mixing silicon carbide and water.
Of these statements :
(a) I and II are correct
(b) I and III are correct
(c) II and III are correct
(d) I, II and III are correct
2062: With reference to the economic history of medieval India, the term 'Araghatta' refers to
(a) bonded labour
(b) land grants made to military officers
(c) waterwheel used in the irrigation of land
(d) wasteland converted to cultivated land
2063: Which one of the following is a useful functional association between fungi and the roots of higher plants ?
(a) Biofertilizer
(b) Coralloid root
(c) Lichen
(d) Mycorrhiza
2064: In India, who is the Chairman of the National Water Resources Council?
(a) Prime Minister
(b) Minister of Water Resources
(c) Minister of Environment and Forests
(d) Minister of Science and Technology
2065: Which one of the following is another name of RDX ?
(a) Selenium
(b) Cyclonite
(c) Cyanohydrin
(d) Cyclohexane