JEE Main 2021 (Online) 25th February Morning Shift | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

In which of the following pairs, the outer most electronic configuration will be the same?

A

Cr⁺ and Mn²⁺

B

Ni²⁺ and Cu⁺

C

V²⁺ and Cr⁺

D

Fe²⁺ and Co⁺

2

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Ellingham diagram is a graphical representation of :

A

$$\Delta$$G vs P

B

$$\Delta$$G vs T

C

($$\Delta$$G $$-$$ T$$\Delta$$S) vs T

D

$$\Delta$$H vs T

3

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Which of the following reaction/s will not give p-aminoazobenzene?

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Compounds Containing Nitrogen Question 129 English

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Compounds Containing Nitrogen Question 129 English

A

C only

B

A only

C

A and B

D

B only

4

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Which statement is correct?

A

Buna-N is a natural polymer.

B

Synthesis of Buna-S needs nascent oxygen.

C

Buna-S is a synthetic and linear thermosetting polymer.

D

Neoprene is an addition copolymer used in plastic bucket manufacturing.

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