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InOrganic Chemistry -- Metals
21.
Anhydrous magnesium chloride can be prepared by heating MgCl2.6H2O
- A.with concentrated HCl
- B.in an atmosphere of nitrogen
- C.in a current of dry HCl gas
- D.in an atmosphere of hydrogen
- Answer
- Report
Answer : [C]
22.
In the Solvay process
- A.an ammoniacal brine solution is carbonated with CO2, forming NaHCO3 which on decomposition at 150oC produces Na2CO3
- B.a sodium amalgam reacts with water to produce NaOH which gives Na2CO3 on reacting with CO2
- C.a brine solution is made to react with BaCO3 to produce Na2CO3
- D.brine is carbonated with CO2 forming NaHCO3 which on decomposition at 150oC produces Na2CO3
- Answer
- Report
Answer : [C]
23.
When a saturated solution of magnesium sulphate is treated with NH4Cl
and NH3, followed by the addition of disodium hydrogen phosphate, a white precipitate of
- A.Mg2P2O7
- B.Mg3(PO4)2
- C.Mg(NH4)PO4
- D.Mg(NH4)HPO4
- Answer
- Report
Answer : [C]
24.
The order of the solubility of the sulphates of alkaline earth metals in water is
- A.Be > Mg > Ca > Sr > Ba
- B.Mg > Be >> Ba > Ca > Sr
- C.Be > Ca > Mg > Ba >> Sr
- D.Mg > Ca > Ba >> Be > Sr
- Answer
- Report
Answer : [A]
25.
The solubility of the fluorides and hydroxides of alkaline earth metals
increases on descending the group because the
- A.lattice energy of the compounds increases more rapidly than the hydration energy
- B.lattice energy of the compounds decreases more rapidly than the hydration energy
- C.size of the metals decreases on descending the group
- D.ionization energy of the metals increases on descending the group
- Answer
- Report
Answer : [B]
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