431: In which type of rocks are metals like gold and copper mostly found?
(a) Old igneous
(b) Old metamorphic
(c) Old sedimentary
(d) New metamorphic
432: Write the correct chronological order of the following?
(A) Pitt's India Act
(B) Rowlatt Act
(C) Regulating Act
(D) Indian Councils Act
(a) A, C, D, B
(b) B, A, C, D
(c) C, A, D, B
(d) D, B, A, C
433: The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
(a) Ice is a bad conductor of heat
(b) Since the surface of the lake is at the same temperature as the air, no heat is lost
(c) The density of water is maximum at 4 degree celcius
(d) None of the statements (a), (b) and (c) given above is correct.
434: The gas used for artificial ripening of green fruits is
(a) Carbon dioxide
(b) Ethane
(c) Hydrogen
(d) acetylene (ethyne)
435: The terms `Marginal Standing Facility Rate and `Net Demand and Time Liabilities, sometimes appearing in news, are used in relation to
(a) banking operations
(b) communication networking
(c) military strategies
(d) supply and demand of agricultural products