Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.
46. The hardest form of carbon is
(a) Coke
(b) Graphite
(c) Diamond
(d) Charcoal
47. The first metal to be used by man was
(a) Aluminium
(b) Copper
(c) Silver
(d) Iron
48. The most malleable metal is
(a) Platinum
(b) Silver
(c) Iron
(d) Gold
49. The difference between isotopes of an element is due to the presence of a different number of
(a) Protons
(b) Neutrons
(c) Electrons
(d) Photons
50. The major constituent of air is
(a) Nitrogen
(b) Carbon dioxide
(c) Oxygen
(d) Hydrogen
51. The chief constituent of gobar gas (Bio Gas) is
(a) Methane
(b) Ethane
(c) Propane
(d) Chloride
52. The gas used in the manufacture of vanaspati from vegetable oil is
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon dioxide
53. The most reactive among the halogens is
(a) Bromine
(b) Chlorine
(c) Iodine
(d) Fluorine
54. Which particle of atom has no charge
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these
55. Which are on the outer orbit of an atom
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these
56. Stainless steel is an alloy of
(a) Iron, Carbon and Nickel
(b) Iron and Manganese
(c) Iron, Chromium and Zinc
(d) Iron, Chromium and Nickel
57. Which particle of atom has a positive charge
(a) Proton
(b) Neutron
(c) Electrons
(d) None of these
58. The major component in the LPG is
(a) Butane
(b) Methane
(c) Propane
(d) Ethane
59. The main constituent gas of CNG is
(a) Benzene
(b) Ethane
(c) Methane
(d) Butane
60. Which of the following; is not a chemical action
(a) Burning of coal
(b) Conversation of water into steam
(c) Digestion of food
(d) Burning of paper
