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 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following reactions exhibits the reducing property of ozone?

A
$$\mathrm{PbS}_{(\mathrm{s})}+4 \mathrm{O}_{3(\mathrm{~g})} \rightarrow \mathrm{PbSO}_{4(\mathrm{~s})}+4 \mathrm{O}_{2(\mathrm{~g})}$$
B
$$\mathrm{BaO}_{2 \text { (g) }}+\mathrm{O}_{3(\mathrm{~g})} \rightarrow \mathrm{BaO}_{(\mathrm{s})}+2 \mathrm{O}_{2 \text { (g) }}$$
C
$$\mathrm{NO}_{(\mathrm{g})}+\mathrm{O}_{3(\mathrm{~g})} \rightarrow \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}$$
D
$$2 \mathrm{KI}_{(\mathrm{qq})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}+\mathrm{O}_{3(\mathrm{~g})} \rightarrow 2 \mathrm{KOH}_{(\mathrm{aq})}+\mathrm{I}_{2(\mathrm{~g})}+\mathrm{O}_2(\mathrm{~g})$$
3
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of following is NOT a redox reaction?

A
$$\mathrm{CH}_3 \mathrm{CHO}+\mathrm{Cu}(\mathrm{OH})_2 \longrightarrow \mathrm{CH}_3 \mathrm{COOH}+\mathrm{Cu}_2 \mathrm{O}$$
B
$$\mathrm{SnCl}_4+\mathrm{FeCl}_2 \longrightarrow \mathrm{FeCl}_3+\mathrm{SnCl}_2$$
C
$$\mathrm{H}_2 \mathrm{SO}_4+\mathrm{Ca}(\mathrm{OH})_2 \longrightarrow \mathrm{CaSO}_4+\mathrm{H}_2 \mathrm{O}$$
D
$$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}+[\mathrm{O}] \longrightarrow \mathrm{CH}_3 \mathrm{CHO}+\mathrm{H}_2 \mathrm{O}$$
4
MHT CET 2021 24th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

What is the change in oxidation number of nitrogen in following conversion?

$$\mathrm{NO}_3^{-} \longrightarrow \mathrm{NO}_2$$

A
+4 to +5
B
+3 to +5
C
+5 to +4
D
$$-$$3 to +5
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