1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The equivalent weight of $$\mathrm{Na}_2 \mathrm{S}_2 \mathrm{O}_3(\mathrm{Gram}$$ molecular weight $$=\mathrm{M})$$ in the given reaction is

$$\mathrm{I}_2+2 \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3=2 \mathrm{NaI}+\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6$$

A
$$\mathrm{M} / 2$$
B
$$\mathrm{M}$$
C
$$2 \mathrm{M}$$
D
$$\mathrm{M / 4}$$
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The equivalent weight of KIO$$_3$$ in the given reaction is (M = molecular mass):

$$\mathrm{2Cr{(OH)_3} + 4O{H^ - } + KI{O_3} \to 2CrO_4^{2 - } + 5{H_2}O + KI}$$

A
M
B
M/2
C
M/6
D
M/8
3
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Oxidation states of Cr in K2Cr2O7 and CrO5 are respectively

A
+6, +5
B
+6, +10
C
+6, +6
D
None of these
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A given amount of Fe2+ is oxidised by x mol of $$MnO_4^ - $$ in acidic medium. The number of moles of $$C{r_2}O_7^{2 - }$$ required to oxidise the same amount of Fe2+ in acidic medium is
A
x
B
0.83 x
C
2.0 x
D
1.2 x
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