JEE Main 2019 (Online) 9th January Morning Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO₄ electrolyzed in g during the process is : (Molar mass of PbSO₄ = 303 g mol^$$-$$1)

A

22.8

B

15.2

C

7.6

D

11.4

2

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Which one of the following statements regarding Henry's law is not correct ?

A

Higher the value of K_H at a given pressure, higher is the solubility of the gas in the liquids

B

Different gases have different K_H (Henry's law constant) values at the same temperature.

C

The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.

D

The value of K_H increases with increase of temperature and K_H is function of the nature of the gas

3

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is :

A

5.92

B

6.93

C

3.87

D

4.90

4

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The correct decreasing order for acid strength is :

A

NO₂CH₂COOH > FCH₂COOH > CNCH₂COOH > ClCH₂COOH

B

FCH₂COOH > NCCH₂COOH > NO₂CH₂COOH > ClCH₂COOH

C

CNCH₂COOH > O₂NCH₂COOH > FCH₂COOH > ClCH₂COOH

D

NO₂CH₂COOH > NCCH₂COOH > FCH₂COOH > ClCH₂COOH

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