JEE Main 2022 (Online) 28th June Evening Shift | Ionic Equilibrium Question 36 | Chemistry

JEE Main 2022 (Online) 28th June Evening Shift

MCQ (Single Correct Answer)

-1

A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of $${{[C{H_3}C{H_2}CO{O^ - }]} \over {[C{H_3}C{H_2}COOH]}}$$ required to make buffer is ___________.

Given : $${K_a}(C{H_3}C{H_2}COOH) = 1.3 \times {10^{ - 5}}$$

0.03

0.13

0.23

0.33

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

-1

The K_sp for bismuth sulphide (Bi₂S₃) is 1.08 $$\times$$ 10^$$-$$73. The solubility of Bi₂S₃ in mol L^$$-$$1 at 298 K is :

1.0 $$\times$$ 10^$$-$$15

2.7 $$\times$$ 10^$$-$$12

3.2 $$\times$$ 10^$$-$$10

4.2 $$\times$$ 10^$$-$$8

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : The amphoteric nature of water is explained by using Lewis acid/base concept.

Reason R : Water acts as an acid with NH₃ and as a base with H₂S.

In the light of the above statements choose the correct answer from the options given below :

Both A and R are true and R is the correct explanation of A.

Both A and R are true but R is NOT the correct explanation of A.

A is true but R is false.

A is false but R is true.

JEE Main 2021 (Online) 26th August Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements.

Statement I : In the titration between strong acid and weak base methyl orange is suitable as an indicator.

Statement II : For titration of acetic acid with NaOH phenolphthalein is not a suitable indicator.

In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is false but Statement II is true

Statement I is true but Statement II is false

Both Statement I and Statement II are true

Both Statement I and Statement II are false

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