WB JEE 2024 | Redox Reaction Question 1 | Chemistry

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

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

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

$$\mathrm{M} / 2$$

$$\mathrm{M}$$

$$2 \mathrm{M}$$

$$\mathrm{M / 4}$$

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

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

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

M/2

M/6

M/8

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

Oxidation states of Cr in K₂Cr₂O₇ and CrO₅ are respectively

+6, +5

+6, +10

+6, +6

None of these

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

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

0.83 x

2.0 x

1.2 x

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