1
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Choose the group of ions / molecules in which none of the species undergo Disproportionation reaction.

A
$$\mathrm{F}_2, \mathrm{ClO}^{-}, \mathrm{Cl}_2, \mathrm{ClO}_2^{-}$$
B
$$\mathrm{P}_4, \mathrm{H}_2 \mathrm{O}_2, \mathrm{BrO}_2^{-}, \mathrm{NO}_2$$
C
$$\mathrm{Cr}_2 \mathrm{O}_7^{2-}, \mathrm{F}_2, \mathrm{MnO}_4^{-}, \mathrm{ClO}_4{ }^{-}$$
D
$$\mathrm{ClO}_3^{-}, \mathrm{S}_8, \mathrm{ClO}^{-}, \mathrm{ClO}_4^{-}$$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

In dilute alkaline solution $$\mathrm{MnO}_4^{-}$$ changes to

A
$$\mathrm{MnO}_2$$
B
$$\mathrm{MnO}_4^{2-}$$
C
$$\mathrm{MnO}$$
D
$$\mathrm{Mn}_2 \mathrm{O}_3$$
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

In neutral medium $$\mathrm{KMnO}_4$$ oxidises $$\mathrm{MnSO}_4$$ to _________

A
$$\mathrm{Mn}_2 \mathrm{O}_3$$
B
$$\mathrm{Mn}_3 \mathrm{O}_4$$
C
$$\mathrm{MnO}_2$$
D
$$\mathrm{K}_2 \mathrm{MnO}_4$$
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the given Redox equation, identify the stoichiometric coefficients $$\mathrm{w}, \mathrm{x}, \mathrm{y}$$ and $$\mathrm{z}$$.

$$\mathrm{ClO}_3^{-1}+\mathrm{w} \mathrm{Cl}^{-1}+\mathrm{xH}^{+} \rightarrow \mathrm{y} \mathrm{H}_2 \mathrm{O}+\mathrm{zCl}_2$$

A
$$ w=3 \quad x=6 \quad y=3 \quad z=2 $$
B
$$ w=5 \quad x=6 \quad y=3 \quad z=3 $$
C
$$ w=7 \quad x=6 \quad y=3 \quad z=4 $$
D
$$ w=6 \quad x=5 \quad y=2.5 \quad z=3 $$
COMEDK Subjects
EXAM MAP