WB JEE 2023 | Redox Reaction Question 4 | Chemistry

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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

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

0.126 g of an acid is needed to completely neutralise 20 mL 0.1 (N) NaOH solution. The equivalent weight of the acid is

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