JEE Main 2022 (Online) 26th June Evening Shift | Redox Reactions Question 32 | Chemistry

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

-1

Which one of the following is an example of disproportionation reaction ?

$$3MnO_4^{2 - } + 4{H^ + } \to 2MnO_4^ - + Mn{O_2} + 2{H_2}O$$

$$MnO_4^ - + 4{H^ + } + 4{e^ - } \to Mn{O_2} + 2{H_2}O$$

$$10{I^ - } + 2MnO_4^ - + 16{H^ + } \to 2M{n^{2 + }} + 8{H_2}O + 5{I_2}$$

$$8MnO_4^ - + 3{S_2}O_3^{2 - } + {H_2}O \to 8Mn{O_2} + 6SO_4^{2 - } + 2O{H^ - }$$

JEE Main 2021 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

-1

The oxidation states of 'P' in H₄P₂O₇, H₄P₂O₅ and H₄P₂O₆, respectively, are :

7, 5 and 6

5, 4 and 3

5, 3 and 4

6, 4 and 5

JEE Main 2021 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

-1

Identify the process in which change in the oxidation state is five :

$$C{r_2}O_7^{2 - } \to 2C{r^{3 + }}$$

$$MnO_4^ - \to M{n^{2 + }}$$

$$CrO_4^{2 - } \to C{r^{3 + }}$$

$${C_2}O_4^{2 - } \to 2C{O_2}$$

JEE Main 2021 (Online) 18th March Evening Shift

MCQ (Single Correct Answer)

-1

The oxidation states of nitrogen in NO, NO₂, N₂O and NO$$_3^ - $$ are in the order of :

N₂O > NO₂ > NO > NO$$_3^ - $$

NO > NO₂ > N₂O > NO$$_3^ - $$

NO₂ > NO$$_3^ - $$ > NO > N₂O

NO$$_3^ - $$ > NO₂ > NO > N₂O

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