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1
MHT CET 2025 20th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which metal in following compounds is not present in fractional oxidation state?

A
$\quad \mathrm{Fe}_3 \mathrm{O}_4$
B
$\quad \mathrm{Mn}_3 \mathrm{O}_4$
C
$\quad \mathrm{Pb}_3 \mathrm{O}_4$
D
$\quad \mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6$
2
MHT CET 2025 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is a redox reaction?

A

$\mathrm{NaCl}+\mathrm{KNO}_3 \longrightarrow \mathrm{NaNO}_3+\mathrm{KCl}$

B

$\mathrm{Mg}(\mathrm{OH})_2+2 \mathrm{NH}_4 \mathrm{Cl} \longrightarrow \mathrm{MgCl}_2+2 \mathrm{NH}_4 \mathrm{OH}$

C

$\mathrm{CaC}_2 \mathrm{O}_4+2 \mathrm{HCl} \longrightarrow \mathrm{CaCl}_2+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4$

D

$\mathrm{Zn}+2 \mathrm{AgCN} \longrightarrow 2 \mathrm{Ag}+\mathrm{Zn}(\mathrm{CN})_2$

3
MHT CET 2025 19th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

What are the respective oxidation states of sulphur atoms numbered 1 to 4 in tetrathionate ion shown below?

A
$0,+5,+5,0$
B
$+5,0,0,+5$
C
$+2,0,0,+2$
D
$+2,-1,-1,+2$
4
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the oxidation number of Mn in $\mathrm{MnO}_4^{-}$?

A
$-$5
B
5
C
6
D
7
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