Dissolution of sodium chloride in water is a chemical process.
Physical
No, it is a physical change.
NaCl plus CaCO3 plus water
H2O + NaCl
Sodium chloride and water form a solution, a homogeneous mixture not a compound.
Yes it is
Yes. When NaCl is added to water, it forms a solution, which is a homogeneous mixture.
It will produce SO2 , H2O and NaCl
2NH4Cl + Na2CO3 --> 2NH3 + CO2 + H2O + 2NaCl
Yes
That is correct: HCl(aq) + NaOH(aq) --> NaCl(aq) +H2O
This neutralization reaction is:NaOH + HCl = NaCl + H2O