JEE Main 2019 (Online) 10th April Evening Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

For the reaction of H₂ with I₂, the rate constant is 2.5 × 10^–4 dm³ mol^–1s^–1 at 327°C and 1.0 dm³ mol^–1 at 527°C. The activation energy for the reaction, in kJ mole^–1 is : (R = 8.314 JK^–1 mol^–1 )

A

59

B

166

C

72

D

150

2

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

In chromatography, which of the following statements is incorrect for R_f ?

A

R_f value depends on the type of chromatography.

B

Higher R_f value means higher adsorption.

C

R_f value is dependent on the mobile phase.

D

The value of R_f can not be more than one.

3

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The INCORRECT statement is :

A

the color of [CoCl(NH₃)₅]²⁺ is violet as it absorbs the yellow light.

B

the gemstone, ruby, has Cr³⁺ ions occupying the octahedral sites of beryl.

C

the spin-only magnetic moment of [Ni(NH₃)₄(H₂O)₂]²⁺ is 2.83 BM.

D

the spin-only magnetic moments of [Fe(H₂O)₆]²⁺ and [Cr(H₂O)₆]²⁺ are nearly similar.

4

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The highest possible oxidation states of uranium and plutonium, respectively are :

A

4 and 6

B

6 and 4

C

7 and 6

D

6 and 7

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