Common table salt is hygroscopic due to the presence of

Q. Table salt is contaminated with $NaHC{O}_3$ due to presence of $MgC{l}_2$ as impurity (from sea).
If true enter 1, else enter 0.

Q. Assertion :Statement -I: $NaCl$ when exposed in air it becomes wet.
Reason: Statement -II: $NaCl$ contains hygroscopic impurities like ${CaCl}_2$, ${MgCl}_2$ etc.

Q. Complete the below table:
For magnesium, it is solved and shown with the formulae, in the same way, do for the rest of the metal.

	Chloride	Sulphate	Oxide	Phosphate
Magnesium	$MgC{l}_2$	$MgS{O}_4$	$MgO$	$M{g}_3(P{O}_4{)}_2$
Sodium
Aluminium
Iron(II)

Q. Crude common salt is hygroscopic because of impurities of:

Q. Different samples of water contained each $100$ ppm of $CaC{l}_2,MgS{O}_4,CaS{O}_4$ and $MgC{l}_2$. Among them which will have greater hardness?