Give chemical test to distinguish between( 1)ammonium sulphate and sodium sulphate (2) ammonium chloride and sodium chloride (3)liquor ammonia and liquid ammonia (4)ammonium sulphate and ammonium nitrate

1. Distinguishing test between ammonium sulphate and sodium sulphate :
If you heat ammonium sulphate with calcium oxide, smell of ammonia will come out.
(NH₄)₂SO₄ + CaO $\to$ CaSO₄ + 2NH₃ +H₂O
 
If  a wet glass road by HCl is hold on the evolved gas, white fumes of NH₄Cl will form.
NH₃ + HCl $\to$ NH₄Cl
 
But sodium sulphate (Na₂SO₄) does not respond to above mentioned tests.
If flame test is performed with Na₂SO₄, a golden yellow flame will be observed.

2. Distinguishing test between ammonium chloride (NH₄Cl) and sodium chloride (NaCl)
If you heat ammonium sulphate with calcium oxide, smell of ammonia will come out
If a wet glass road by HCl is hold on the evolved gas, white fumes of NH₄Cl will form.
NH₃ + HCl  $\to$ NH₄Cl
 
But sodium sulphate (NaCl) does not respond to above mentioned test.
If flame test is performed with NaCl, a golden yellow flame will be observed.

3. Distinguishing test between liquor ammonia and liquid ammonia
Liquor ammonia contains water. So if anhydrous copper sulphate (white colour) is added to it, it will become blue in colour by absorbing water.
CuSO₄ (white) + 5H₂O → CuSO₄. 5H₂O (blue)
Liquid ammonia (anhydrous) does not contain water, so this will not change the colour of anhydrous copper sulphate to blue.
 
Physical test: liquor ammonia exists in low / room temperature. But liquid ammonia has the boiling temperature of -33.4^oC.
 

4. Distinguishing test between ammonium sulphate and ammonium nitrate If
BaCl₂ is added to (NH₄)₂SO₄ , a white precipitate of BaSO₄ will appear, but NH₄NO₃ does not give any precipitate with BaCl₂
BaCl₂  + (NH₄)₂SO₄ → BaSO₄ + 2NH₄Cl