8
MCQ (Single Correct Answer)
Which of the following equations depict the oxidising nature of $\mathrm{H}_2 \mathrm{O}_2$ ?
A
$2 \mathrm{MnO}_4^{-}+6 \mathrm{H}^{+}+5 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_2 \mathrm{O}+5 \mathrm{O}_2$
B
$2 \mathrm{Fe}^{3+}+2 \mathrm{H}^{+}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{Fe}^{2+}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$
C
$2 \mathrm{I}^{-}+2 \mathrm{H}^{+}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{I}_2+2 \mathrm{H}_2 \mathrm{O}$
D
$\mathrm{KIO}_4+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{KIO}_3+\mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$
9
MCQ (Single Correct Answer)
Which of the following equation depicts reducing nature of $\mathrm{H}_2 \mathrm{O}_2$ ?
A
$2\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}+2 \mathrm{H}^{+}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}+2 \mathrm{H}_2 \mathrm{O}$
B
$\mathrm{I}_2+\mathrm{H}_2 \mathrm{O}_2+2 \mathrm{OH}^{-} \longrightarrow 2 \mathrm{I}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$
C
$\mathrm{Mn}^{2+}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{Mn}^{4+}+2 \mathrm{OH}^{-}$
D
$\mathrm{PbS}+4 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{PbSO}_4+4 \mathrm{H}_2 \mathrm{O}$
10
MCQ (Single Correct Answer)
Hydrogen peroxide is ........... .
A
an oxidising agent
B
a reducing agent
C
both an oxidising and a reducing agent
D
neither oxidising nor reducing agent
11
MCQ (Single Correct Answer)
Which of the following reactions increases production of dihydrogen from synthesis gas?
A
$\mathrm{CH}_4(\mathrm{~g})+\mathrm{H}_2 \mathrm{O}(\mathrm{g}) \xrightarrow[\mathrm{Ni}]{1270 \mathrm{~K}} \mathrm{CO}(\mathrm{g})+3 \mathrm{H}_2(\mathrm{~g})$
B
$\mathrm{C}(\mathrm{s})+\mathrm{H}_2 \mathrm{O}(\mathrm{g}) \xrightarrow{1270 \mathrm{~K}} \mathrm{CO}(\mathrm{g})+\mathrm{H}_2(\mathrm{~g})$
C
$\mathrm{CO}(\mathrm{g})+\mathrm{H}_2 \mathrm{O}(\mathrm{g}) \xrightarrow[\text { Catalyst }]{673 \mathrm{~K}} \mathrm{CO}_2(\mathrm{~g})+\mathrm{H}_2(\mathrm{~g})$
D
$\mathrm{C}_2 \mathrm{H}_6+2 \mathrm{H}_2 \mathrm{O} \xrightarrow[\mathrm{Ni}]{1270 \mathrm{~K}} 2 \mathrm{CO}+5 \mathrm{H}_2$
12
MCQ (Single Correct Answer)
When sodium peroxide is treated with dilute sulphuric acid, we get ............ .
A
sodium sulphate and water
B
sodium sulphate and oxygen
C
sodium sulphate, hydrogen and oxygen
D
sodium sulphate and hydrogen peroxide