Match the 'cations' A to F and the solubility of ppt. G or H with the correct colours from 'X' and 'Y'.

Select the correct 'anion' of a salt from the anions given, which matches with description 1 to 5.

A: CO₃^2-, B: NO₃^1-, C: SO₄^2-, D: Cl^-, E: S^2-

1. The salt soln. reacts with AgNO₃ soln. to give a white ppt. insoluble in dil. HNO₃.
2. The salt soln. reacts with Ba(NO₃)₂ soln. to give a white ppt. insoluble in dil. HNO₃.
3. The salt soln. reacts with Ba(NO₃)₂ soln. to give a white ppt. soluble in dil. HNO₃ but insoluble in dil. H₂SO₄.
4. The salt reacts with dil. H₂SO₄ on heating evolving a gas which turns KMnO₄ soln. pink to colourless.
5. The salt reacts with conc. H₂SO₄ on heating evolving a coloured gas which turns potassium iodide paper brown.

Give balanced equations for the conversions A and B.

1. $\text{Metallic carbonate} \quad \raisebox{0.35em}{A} \space \xrightarrow{\text{Ba(NO}$3)2} \text{White precipitate} \quad \raisebox{0.35em}{B} \space \xrightarrow{\text{dil. HCl}} \text{precipitate dissolves}
2. $\text{Metallic sulphide} \quad \raisebox{0.35em}{A} \space \xrightarrow{\text{Pb(CH}$3{\text{COO}})2 \text{ soln.}} \text{black precipitate }
3. $\text{Metallic salt} \quad \raisebox{0.35em}{A} \space \xrightarrow{\text{BaCl}_2 \text{ soln.}} \text{Barium sulphite} \quad \raisebox{0.35em}{B} \space \xrightarrow{\text{dil. HCl}} \text{Barium chloride}$
4. $\text{Metallic chloride} \quad \raisebox{0.35em}{A} \space \xrightarrow{\text{conc. H}$2\text{SO}4\Delta} \text{Gas evolved} \quad \raisebox{0.35em}{B} \space \xrightarrow{\text{AgNO}_3} \text{White precipitate}
5. $\text{Metallic salt} \quad \raisebox{0.35em}{A} \space \xrightarrow{\text{BaCl}_2} \text{White precipitate insoluble in dil. HCl}$

Select the correct word from the words in bracket.

1. The solution which on heating with CaCO₃ evolves CO₂ gas. [conc. H₂SO₄ / dil.H₂SO₄ / dil. HCl]
2. The solution which can be used to distinguish an ammonium salt from a sodium salt. [CuCl₂ soln. / NH₄OH / dil. H₂SO₄ / AgNO₃ soln.]
3. The pH of blood is around 7.4, of saliva is 6.5 and of acid rain is around 4.5. The solution which is slightly alkaline of the three. [saliva / acid rain / blood]
4. Decomposition of [NaCl / NaHCO₃ / NaNO₃] by dil. H₂SO₄, forms an unstable acid.
5. A metal which reacts with an alkali to liberate hydrogen. [iron / copper / aluminium]