(a) Iron, gold, and silver(b) Gold, silver, and lead(c) Iron, lead, and sulfur(d) All of the above minerals ✅

(a) Anthracite(b) Bituminous coal(c) Lignite(d) Peat ✅

(a) Anthracite and bituminous coal(b) Petroleum and natural gas(c) Uranium and thorium ✅(d) Lignite and peat

(a) Low temperature ✅(b) High temperature(c) Moderate temperature(d) Non of these

(a) Carbon(b) Hydrogen(c) Oxygen(d) Uranium ✅

(a) Copper and nickel ✅(b) Graphite(c) Asbestos(d) Sulphur

(a) Cobalt(b) Iron Ore ✅(c) Gypsum(d) Uranium

(a) Australia(b) Antarctica ✅(c) North America(d) None of them

(a) Air(b) Fossil Fuels ✅(c) Forests and wildlife(d) Solar energy

(a) Chlorine only(b) Caustic soda only(c) Caustic soda and soda ash(d) Chlorine, caustic soda, and soda ash ✅

(a) Loamy soil ✅(b) Sandy soil(c) Clayey soil(d) Desert soil

(a) 5 years(b) 10 years(c) 20 years(d) 35 years ✅

(a) Dew Point(b) Hydrogram(c) Flash Point ✅(d) Stevenson Screen

(a) 7.7% ✅(b) 9.5%(c) 41%(d) 60%

(a) Afghanistan(b) Nepal(c) Switzerland(d) Cambodia ✅