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1

JEE Main 2020 (Online) 8th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

The radius of the second Bohr orbit, in terms of the Bohr radius, a₀, in Li²⁺ is :

A

$${{2{a_0}} \over 9}$$

B

$${{2{a_0}} \over 3}$$

C

$${{4{a_0}} \over 9}$$

D

$${{4{a_0}} \over 3}$$

2

JEE Main 2020 (Online) 8th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

Among (a) – (d) the complexes that can display geometrical isomerism are :
(a) [Pt(NH₃)₃Cl]⁺
(b) [Pt(NH₃)Cl₅]^–
(c) [Pt(NH₃)₂Cl(NO₂)]
(d) [Pt(NH₃)₄ClBr]²⁺

A

(a) and (b)

B

(c) and (d)

C

(d) and (a)

D

(b) and (c)

3

JEE Main 2020 (Online) 8th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

The major product in the following reaction is: JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 85 English

JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 85 English

A

JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 85 English Option 1

B

JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 85 English Option 2

C

JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 85 English Option 3

D

JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 85 English Option 4

4

JEE Main 2020 (Online) 8th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

Two monomers in maltose are :

A

$$\alpha $$-D-glucose and $$\alpha $$-D-galactose

B

$$\alpha $$-D-glucose and $$\alpha $$-D-Fructose

C

$$\alpha $$-D-glucose and $$\alpha $$-D-glucose

D

$$\alpha $$-D-glucose and $$\beta $$-D-glucose

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