6(c)
A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated.
A: Typical acid property
B: Non-volatile acid
C: Oxidizing agent
D: Dehydrating agent
Choose the property [A, B, C or D] depending on which is relevant to each of the following:
(i) Preparation of hydrogen chloride gas.
(ii) Preparation of copper sulphate from copper oxide.
(iii) Action of conc. sulphuric acid on sulphur.
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(i) B: Non-volatile acid
$\text{NaCl} + \text{H}_2\text{SO}_4 [\text{conc.}]\xrightarrow{\lt 200 ^{\circ}\text{C}} \text{NaHSO}_\text{4} + \text{HCl}$
(ii) A: Typical acid property
CuO + H2SO4 (conc.) ⟶ CuSO4 + H2O
(iii) C: Oxidizing agent
S + 2H2SO4 (conc.) ⟶ 3SO2 + 2H2O