Q26 / 160 · AP EAMCET 2018 (22 Apr Shift 2) · Chemistry

The element $X$ on reaction with conc. $\mathrm{HNO}_3$ forms two acidic oxides $A$ and $B$ of different shapes. Element $Z$ on reaction with conc. $\mathrm{H}_2 \mathrm{SO}_4$ forms two acidic oxides $A$ and $D$ of different shapes. What are $X$ and $Z$ ?

  • Correct answer
    A
    C, C
  • B
    S, Cu
  • C
    C, S
  • D
    C, Cu

Solution

$$ \begin{aligned} & \mathrm{C}+4 \mathrm{HNO}_3 \longrightarrow \mathrm{CO}_2+4 \mathrm{NO}_2+2 \mathrm{H}_2 \mathrm{O} \\ & \mathrm{C}+2 \mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{CO}_2+2 \mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O} \end{aligned} $$ $\mathrm{CO}_2$ and $\mathrm{SO}_2$ both are acidic.

Hence, the correct answer is option: 'A'.

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