51) Which of the following heavy chemicals are produced from common salt?
(A) Chlorine only
(B) Caustic soda only
(C) Caustic soda and soda ash
(D) Chlorine, caustic soda and soda ash
52) Which of the following is not an example of exhaustible resources of the earth available to man?
(A) Coal
(B) Natural gas
(C) Petroleum
(D) Water
53) Which of the following is not an example of inexhaustible resources of the earth available to man?
(A) Air
(B) Fossil fuels
(C) Forests and wildlife
(D) Solar energy
54) Which one of the following four agricultural resources by way of crops cultivated by man does not belong to the group comprising the remaining three?
(A) Coffee
(B) Fruits
(C) Sugarcane
(D) Vegetables
55) Which is the least populated continent of the world?
(A) Antarctica
(B) Australia
(C) North America
(D) None of them
56) All of the following are renewable abiotic resources in nature except _________
(A) Cobalt
(B) Copper and nickel
(C) Iron ore
(D) Manganese
57) Which of the following is a non-metallic mineral?
(A) Cobalt
(B) Gypsum
(C) Thorium
(D) Uranium
58) All of the following are non-metallic mineral, except __________
(A) Asbestos
(B) Graphite
(C) Platinum
(D) Sulfur
59) The base of all of the following fuels is organic materials, except that of _________
(A) Coal
(B) Natural gas
(C) Petroleum
(D) Uranium
60) Which of the following exhaustible and non-renewable fuels are inorganic in nature?
(A) Anthracite and bituminous coal
(B) Petroleum and natural gas
(C) Uranium and thorium
(D) Lignite and peat