JEE Main 2022 (Online) 26th June Evening Shift | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

The oxide which contains an odd electron at the nitrogen atom is :

A

N₂O

B

NO₂

C

N₂O₃

D

N₂O₅

2

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

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

A

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

B

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

C

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

D

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

3

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

A

Ce (At. No. 58)

B

La (At. No. 57)

C

Lu (At. No. 71)

D

Gd (At. No. 64)

4

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The measured BOD values for four different water samples (A-D) are as follows: A = 3 ppm; B = 18 ppm; C = 21 ppm; D = 4 ppm. The water samples which can be called as highly polluted with organic wastes, are :

A

A and B

B

A and D

C

B and C

D

B and D

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