2nd Year Chemistry MCQs F.Sc. Part 2
Chapter No.2
S Block Elements
Total MCQs = 50
16. Alkali metals form:
(a) Ionic compounds
(b) Covalent compounds
(c) Coordinate covalent compounds
(d) None of these
Answer:
(a) Ionic compounds
17. Li20 is:
(a) Orange yellow solid
(b) White solid
(c) Greenish solid
(d) Pale yellow solid
Answer:
(b) White solid
18. Melting point of pure sodium chloride is:
(a) 600 °C
(b) 775 °C
(c) 750 °C
(d) 801 °C
Answer:
(d) 801 °C
19. Lime (CaO) is obtained by thermal decomposition of:
(a) Ca(OH)2
(b) CaCO3
(c) CaHCO3
(d) None
Answer:
(b) CaCO3
20. The element necessary for normal “leaf” development is:
(a) Phosphorus
(b) Sulphur
(c) Calcium
(d) Magnesium
Answer:
(c) Calcium
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