2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.2
S Block Elements
Total MCQs = 50
26. The alkali metal that reacts with nitrogen directly to form Nitride is:
(a) Li
(b) Na
(c) K
(d) Rb
Answer:
(a) Li
27. The electronic configuration of metal (M) is 1s2, 2s2, 3s1. The formula of its oxide would be :
(a) MO
(b) M2O
(c) M2O3
(d) MO2
Answer:
(b) M2O
28. An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt of:
(a) Weak acid and weak base
(b) Strong acid and weak base
(c) Weak acid and strong base
(d) Strong acid and strong base
Answer:
(c) Weak acid and strong base
29. Which of the following is a man-made element?
(a) Ra
(b) Fr
(c) Rn
(d) Cs
Answer:
(b) Fr
30. Dolomite has the composition
(a) KCI.MgCl2.6H20
(b) Na3AIF6
(c) CaCO3.MgCO3
(d) CaCl2.MgC12.6H20
Answer:
(c) CaCO3.MgCO3
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