Sodium carbonate is prepared by _____________________.
Solvay process
Ammonia soda process.
Haber process.
Solvay process or Ammonia soda process
The evaporation of sea water gives crude sodium chloride which contains ________________ as impurities.
sodium sulphate
calcium sulphate,
calcium chloride
All the above
Calcium and magnesium chlorides remain in solution because they are __________________ than sodium chloride.
more soluble.
less soluble.
not soluble.
None of the above.
Sea watercontains_____________ of NaCl.
2.7-2.9%.
2.0-2.5%.
3.0-3.2%.
1.0-1.4%.
._________________ is used in freezing mixture.
Calcium chloride.
Sodium chloride.
Magnesium chloride.
In India,Sodium chloride is prepared by the evaporation of ___________________.
Water.
Sea water
Air.
.__________________ is an essential constituent of our food.
.Sodium chloride.
In sodium chloride solubility does not ______________________ much with _______________ in temperature.
increase,decrease.
deacrease,increase
.increase,increase.
decrease,decrease.
The milky solution coming out of the carbonating tower contains ________________ as a fine suspension.
Sodium.
Carbonate.
Hydrogen.
Sodium hydrogen carbonate.
._____________________ is the main source of sodium chloride
Sea water.
None of the above
