MCQ
Lead pipes are corroded quickly by
- ADil. ${H_2}S{O_4}$
- BConc. ${H_2}S{O_4}$
- ✓Acetic acid
- DWater
$Pb + 2C{H_3}COOH + \frac{1}{2}{O_2} \to Pb{(C{H_3}COO)_2} + {H_2}O$
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Statement $I$: In group $13$, the stability of $+1$ oxidation state increases down the group.
Statement $II$: The atomic size of gallium is greater than that of aluminium.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement $I : CeO _{2}$ can be used for oxidation of aldehydes and ketones.
Statement $II :$ Aqueous solution of $EuSO _{4}$ is a strong reducing agent.
In the light of the above statements, choose the correct answer from the options given below
$C{O_{\left( g \right)}} + \frac{1}{2}{O_{2\left( g \right)}} \to C{O_{2\left( g \right)}}\,;\,\Delta H = - 300\,kJ$
${H_2}_{\left( g \right)} + \frac{1}{2}{O_2}_{\left( g \right)} \to {H_2}{O_{\left( g \right)}}\,;\,\Delta H = - 250\,kJ$
$C_{(s)} + O_{2(g)} \to CO_{2(g)} ; \Delta H = -x\, kJ$
The value of $x$ will be