2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.2
S Block Elements
Total MCQs = 50
16. Which is produced at the cathode during the electrolysis of brine in Nelson’s cell:
(a) H2
(b) Na
(c) C12
(d) O2
Answer:
(a) H2
17. Which of the following elements can produce H2 gas when treated with sodium hydroxide:
(a) Be
(b) Mg
(c) Ca
(d) Sr
Answer:
(a) Be
18. The operating temp of Down’s cell is:
(a) 800°C
(b) 600°C
(c) 1800°C
(d) 900°C
Answer:
(b) 600°C
19. CaMg3(SiO3)4 is the composition of:
(a) Dolomite
(b) Gypsum
(c) Calcite
(d) Asbestos
Answer:
(d) Asbestos
20. Halite is chemical name of:
(a) KCl
(b) NaCl
(c) MgC
(d) Sr Cl2
Answer:
(b) NaCl
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