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2nd Year Chemistry S-Block Elements
MCQs Chapter No. 2
1. Which of the following sulphates is not soluble in water:
(a) Sodium sulphate
(b) Potassium sulphate
(c) Zinc sulphate
(d) Barium sulphate
Answer:
(d) Barium sulphate
2. Chile Salt peter has the chemical formula:
(a) NaNO3
(b) KNO3
(c) Na2B407
(d) Na2CO3.H20
Answer:
(a) NaNO3
3. Which one of the following compounds when dissolved in water reacts with CO2:
(a) Calcium chloride
(b) Sodium chloride
(c) Calcium Sulphate
(d) Calcium hydroxide
Answer:
(d) Calcium hydroxide
4. The main product of the reaction of potassium with oxygen is
(a) KOH
(b) K202
(c) KO2
(d) K20
Answer:
(c) KO2
5. The alkali metal whose carbonate is relatively less stable to heat and decomposes on heating, giving its oxides is:
(a) Li
(b) Ba
(c) K
(d) Rb
Answer:
(a) Li
