JEE Main 2020 (Online) 6th September Evening Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

+4

-1

For the given cell :

Cu(s) | Cu²⁺(C₁M) || Cu²⁺(C₂M) | Cu(s)

change in Gibbs energy ($$\Delta $$G) is negative, if :

A

C₂ = $$\sqrt 2 $$C₁

B

C₂ = $${{{C_1}} \over {\sqrt 2 }}$$

C

C₁ = 2C₂

D

C₁ = C₂

2

JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

+4

-1

Which one of the following statements is not true?

A

Lactose contains $$\alpha $$-glycosidic linkage between C₁ of galactose and C₄ of glucose

B

Lactose is a reducing sugar and it gives Fehling’s test

C

On acid hydrolysis, lactose gives one molecule of D(+)-glucose and one molecule of D(+)-galactose

D

Lactose (C₁₁H₂₂O₁₁) is a disaccharide and it contains 8 hydroxyl groups

3

JEE Main 2020 (Online) 6th September Evening Slot

Numerical

+4

-0

The rate of a reaction decreased by 3.555 times when the temperature was changed from 40^oC to 30^oC. The activation energy (in kJ mol^–1) of the reaction is _______.

Take; R = 8.314 J mol^–1 K^–1 ln 3.555 = 1.268

Your input ____

4

JEE Main 2020 (Online) 6th September Evening Slot

MCQ (Single Correct Answer)

+4

-1

For a d⁴ metal ion in an octahedral field, the correct electronic configuration is :

A

$$t_{2g}^4e_g^0$$ when $$\Delta $$₀ < P

B

$$t_{2g}^3e_g^1$$ when $$\Delta $$₀ > P

C

$$e_g^2t_{2g}^2$$ when $$\Delta $$₀ < P

D

$$t_{2g}^3e_g^1$$ when $$\Delta $$₀ < P

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