JEE Main 2023 (Online) 10th April Morning Shift | Practical Organic Chemistry Question 31 | Chemistry

1

JEE Main 2023 (Online) 10th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Given below are two statements:

Statement I : Aqueous solution of K$$_2$$Cr$$_2$$O$$_7$$ is preferred as a primary standard in volumetric analysis over Na$$_2$$Cr$$_2$$O$$_7$$ aqueous solution.

Statement II : K$$_2$$Cr$$_2$$O$$_7$$ has a higher solubility in water than Na$$_2$$Cr$$_2$$O$$_7$$.

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

A

Statement I is true but Statement II is false

B

Both Statement I and Statement II are false

C

Statement I is false but Statement II is true

D

Both Statement I and Statement II are true

2

JEE Main 2023 (Online) 8th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

A compound '$$\mathrm{X}$$' when treated with phthalic anhydride in presence of concentrated $$\mathrm{H}_{2} \mathrm{SO}_{4}$$ yields '$$\mathrm{Y}$$'. '$$\mathrm{Y}$$' is used as an acid/base indicator. '$$\mathrm{X}$$' and '$$\mathrm{Y}$$' are respectively

A

Toludine, Phenolphthalein

B

Carbolic acid, Phenolphthalein

C

Salicylaldehyde, Phenolphthalein

D

Anisole, methyl orange

3

JEE Main 2023 (Online) 8th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

Given below are two statements:

Statement I : Methyl orange is a weak acid.

Statement II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form.

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

A

Both Statement I and Statement II are incorrect

B

Statement $$\mathrm{I}$$ is incorrect but Statement II is correct

C

Both statement I and Statement II are correct

D

Statement I is correct but Statement II is incorrect

4

JEE Main 2023 (Online) 6th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	LIST I Element detected		LIST II Reagent used / Product formed
A.	Nitrogen	I.	$$\mathrm{Na_2[Fe(CN)_5NO]}$$
B.	Sulphur	II.	$$\mathrm{AgNO_3}$$
C.	Phosphorous	III.	$$\mathrm{Fe_4[Fe(CN)_6]_3}$$
D.	Halogen	IV.	$$\mathrm{(NH_4)_2MoO_4}$$

Choose the correct answer from the options given below:

A

A-III, B-I, C-IV, D-II

B

A-II, B-I, C-IV, D-III

C

A-IV, B-II, C-I, D-III

D

A-II, B-IV, C-I, D-III