1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

KMnO$$_4$$ acts as an oxidising agent in acidic medium. The number of moles of KMnO$$_4$$ that will be required to react with one mole of oxalate ions (to form CO$$_2$$) in acidic solution is

A
$$\frac{2}{5}$$
B
$$\frac{5}{2}$$
C
5
D
$$\frac{5}{4}$$
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following gas readily de-colourises the acidified KMnO$$_4$$ solution?

A
CO$$_2$$
B
SO$$_2$$
C
P$$_2$$O$$_5$$
D
NO$$_2$$
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The oxidation number of Cr in CrO$$_5$$ which has the following structure, is

COMEDK 2021 Chemistry - Redox Reactions Question 9 English

A
+4
B
+5
C
+3
D
+6
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

For decolourisation of 1 mole of KMnO$$_4$$, the moles of H$$_2$$O$$_2$$ required is

A
$$\frac{1}{2}$$
B
$$\frac{3}{2}$$
C
$$\frac{5}{2}$$
D
$$\frac{7}{2}$$
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