JEE Main 2020 (Online) 9th January Morning Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

JEE Main 2020 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The electronic configurations of bivalent europium and trivalent cerium are
(atomic number : Xe = 54, Ce = 58, Eu = 63)

A

[Xe] 4f⁷ 6s² and [Xe] 4f² 6s²

B

[Xe] 4f² and [Xe] 4f⁷

C

[Xe] 4f⁴ and [Xe] 4f⁹

D

[Xe] 4f⁷ and [Xe] 4f¹

2

JEE Main 2020 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Complex X of composition Cr(H₂O)₆Cl_n has a spin only magnetic moment of 3.83 BM. It reacts with AgNO₃ and shows geometrical isomerism. The IUPAC nomenclature of X is :

A

Hexaaqua chromium (III) chloride

B

Tetraaquadichlorido chromium(IV) chloride dihydrate

C

Tetraaquadichlorido chromium (III) chloride dihydrate

D

Dichloridotetraaqua chromium (IV) chloride dihydrate

3

JEE Main 2020 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The increasing order of basicity for the following intermediates is (from weak to strong)
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 215 English 1

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 215 English 1

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 215 English 2

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 215 English 3

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 215 English 4

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 215 English 5

A

(iii) < (i) < (ii) < (iv) < (v)

B

(iii) < (iv) < (ii) < (i) < (v)

C

(v) < (i) < (iv) < (ii) < (iii)

D

(v) < (iii) < (ii) < (iv) < (i)

4

JEE Main 2020 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Identify (A) in the following reaction sequence : JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 213 English

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 213 English

A

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 213 English Option 1

B

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 213 English Option 2

C

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 213 English Option 3

D

JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 213 English Option 4

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