Q. No.Na2CO3 can be manufactured by Solvay’s process but K2CO3 cannot be, because
1. K2CO3 is more soluble
2. K2CO3 is less soluble
3. KHCO3 is more soluble than NaHCO3
4. KHCO3 is less soluble than NaHCO3
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Which of the following metal bicarbonates does not exist as solid?
1. LiHCO3
2. KHCO3
3. RbHCO3
4. NaHCO3
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Which of the following metal is most commonly used in photochemical cells?
1. Lithium
2. Calcium
3. Caesium
4. Fransium
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Which of the following is ‘dead burnt plaster’?
1. CaCO3
2. CaSO4 . 1/2H2O
3. CaSO4 . 2H2O
4. CaSO4
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Which of the following substances can be used for drying gas?
1. Calcium carbonate
2. Sodium carbonate
3. Sodium bicarbonate
4. Calcium oxide
Alkali metals in liquid NH3 produce a blue coloured solution, due to-
1. Polarisability of NH3
2. Charge transfer
3. dd transition
4. Ammoniated electrons
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Correct order of solubility of Group l bicarbonate is
1 RbHCO3KHCO3NaHCO3
2 NaHCO3 KHCO3 RbHCO3
3 LiHCO3 = NaHCO3 = KHCO3 = RbHCO3
4 All group l bicarbonates are insoluble
Strongest reducing agent in aqueous solution of Group l and colour imparted to flame by this element is
1 Cs, blue
2 Cs, red
3 Li, crimson red
4 Li, pink
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An amphoteric oxide dissolves in HCl to form a salt. The salt does not impart any colour to the flame and fumes in moist air. The oxide is
1 CaO
2 Na2O
3 BeO
4 MgO
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Crude common salt is hygroscopic because of impurities of
1 CaBr2 and MgBr2
2 Ca(HCO3)2 and Mg(HCO3)2
3 CaSO4 and MgSO4
4 CaCl2 and MgCl2
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