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InOrganic Chemistry -- Metals
16.
Lithium differs from alkali metals due to
- A.the low hydration energy of Li+
- B.its b.c.c. structure
- C.its extremely high electropositivity
- D.its small atomic and ionic size
- Answer
- Report
Answer : [D]
17.
Sodium thiosulphate is used in photography to
- A.convert metallic silver to a silver salt
- B.reduce silver bromide to a silver salt
- C.remove unreduced silver
- D.remove undecomposed AgBr as a soluble silver thiosulphate complex
- Answer
- Report
Answer : [D]
18.
Sodium carbonate reacts with SO2 in an aqueous medium to give
- A.NaHSO3
- B.NaHSO4
- C.Na2SO3
- D.Na2SO4
- Answer
- Report
Answer : [A]
19.
In a nuclear reactor, molten sodium is used to
- A.absorb neutrons for controlling the chain reaction
- B.absorb the heat generated by a nuclear reaction
- C.slow down fast neutrons
- D.extract the radioisotopes produced in the reactor
- Answer
- Report
Answer : [B]
20.
When hydrated magnesium chloride (MgCl2 6H2O) is heated,
- A.MgO is formed
- B.anhydrous MgCl2 is formed
- C.Mg(OH)HCl is formed
- D.Mg(OH)Cl is formed
- Answer
- Report
Answer : [D]
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