JEE Main 2021 (Online) 27th July Morning Shift | Redox Reactions Question 35 | Chemistry

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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

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

-1

Statement I : Sodium hydride can be used as an oxidising agent.

Statement II : The lone pair of electrons on nitrogen in pyridine makes it basic.

Choose the CORRECT answer from the options given below :

Statement I is false but statement II is true

Both statement I and statement II are true

Statement I is true but statement II is false

Both statement I and statement II are false

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