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1
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following conversions does NOT involve either oxidation or reduction?

A
$$\mathrm{Na} \rightarrow \mathrm{Na}^{+}$$
B
$$\mathrm{VO}_2^{+} \rightarrow \mathrm{V}_2 \mathrm{O}_3$$
C
$$\mathrm{Zn}^{2+} \rightarrow \mathrm{Zn}$$
D
$$\mathrm{CrO}_4^{2-} \rightarrow \mathrm{Cr}_2 \mathrm{O}_7^{2-}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify reducing agent in following reaction

$$\mathrm{H}_2 \mathrm{O}_{2(\mathrm{ag})}+\mathrm{ClO}_{4(\mathrm{aq})}^{-} \rightarrow \mathrm{ClO}_{2(\mathrm{aq})}^{-}+\mathrm{O}_{2(\mathrm{g})}$$

A
$$\mathrm{ClO}_{2(a q)}^{-}$$
B
$$\mathrm{H}_2 \mathrm{O}_{2 \text { (aq) }}$$
C
$$\mathrm{ClO}_{4(a q)}^{-}$$
D
$$\mathrm{O}_{2(\mathrm{g})}$$
3
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Oxidation state of Cr in potassium dichromate is

A
+7
B
+6
C
+1
D
+5
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the value of '$$\mathrm{x}$$' in order to balance the following redox reaction by ion electron method? $$\quad \mathrm{x} \mathrm{H}_2 \mathrm{O}_2+\mathrm{ClO}_4 \rightarrow \mathrm{xO}_2+\mathrm{ClO}_2+2 \mathrm{H}_2 \mathrm{O}$$

A
3
B
4
C
1
D
2
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