2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.2
S Block Elements
Total MCQs = 50Â
46. The substance deposited at the cathode during electrolysis of brine in diaphragm cell:
(FSD 10,14, BWP 10, LHR 14)
(a) Na
(b) H2
(c) Cl2
(d) 02
Answer:
(b) H2
47. The ore CaSO4.2H20 has general name:
(BWP 14, FSD 11,13)
(a) Gypsum
(b) Dolomite
(c) Calcite
(d) Epsom salt
Answer:
(a) Gypsum
48. The only alkaline earth metal which forms peroxide is:
(SGD 2010)
(a) Beryllium
(b) Magnesium
(c) Calcium
(d) Barium
Answer:
(d) Barium
49. The sulphate compound insoluble in water is: (SGD 2010)
(a) Barium sulphate
(b) Sodium sulphate
(c) Potassium sulphate
(d) Zinc sulphate
Answer:
(a) Barium sulphate
50. CaCl2 is added to NaCI in Down’s cell to:
(SGD 2011)
(a) Decrease solubility
(b) Decrease dissociation
(c) Decrease Melting point
(d) Decrease conductivity
Answer:
(c) Decrease Melting point
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