7
MCQ (Single Correct Answer)
In which of the following compounds, an element exhibits two different oxidation states?
A
$\mathrm{NH}_2 \mathrm{OH}$
B
$\mathrm{NH}_4 \mathrm{NO}_3$
C
$\mathrm{N}_2 \mathrm{H}_4$
D
$\mathrm{N}_3 \mathrm{H}$
8
MCQ (Single Correct Answer)
Which of the following arrangements represent increasing oxidation number of the central atom?
A
$\mathrm{CrO}_2^{-}, \mathrm{ClO}_3^{-}, \mathrm{CrO}_4^{2-}, \mathrm{MnO}_4^{-}$
B
$\mathrm{ClO}_3^{-}, \mathrm{CrO}_4^{2-}, \mathrm{MnO}_4^{-}, \mathrm{CrO}_2^{-}$
C
$\mathrm{CrO}_2^{-}, \mathrm{ClO}_3^{-}, \mathrm{MnO}_4^{-}, \mathrm{CrO}_4^{2-}$
D
$\mathrm{CrO}_4^{2-}, \mathrm{MnO}_4^{-}, \mathrm{CrO}_2^{-}, \mathrm{ClO}_3^{-}$
9
MCQ (Single Correct Answer)
The largest oxidation number exhibited by an element depends on its outer electronic configuration. With which of the following outer electronic configurations the element will exhibit largest oxidation number?
A
$3 d^1 4 s^2$
B
$3 d^3 4 s^2$
C
$3 d^5 4 s^1$
D
$3 d^5 4 s^2$
10
MCQ (Single Correct Answer)
Identify disproportionation reaction
A
$\mathrm{CH}_4+2 \mathrm{O}_2 \longrightarrow \mathrm{CO}_2+2 \mathrm{H}_2 \mathrm{O}$
B
$\mathrm{CH}_4+4 \mathrm{Cl}_2 \longrightarrow \mathrm{CCl}_4+4 \mathrm{HCl}$
C
$2 \mathrm{~F}_2+2 \mathrm{OH}^{-} \longrightarrow 2 \mathrm{~F}^{-}+\mathrm{OF}_2+\mathrm{H}_2 \mathrm{O}$
D
$2 \mathrm{NO}_2+2 \mathrm{OH}^{-} \longrightarrow \mathrm{NO}_2^{-}+\mathrm{NO}_3^{-}+\mathrm{H}_2 \mathrm{O}$
11
MCQ (Single Correct Answer)
Which of the following elements does not show disproportionation tendency ?
A
Cl
B
Br
C
F
D
I