Q 1 :

What will be the decreasing order of basic strength of the following conjugate bases?

${}^{-}\mathrm{OH},{\mathrm{RO}}^{-},{\mathrm{CH}}_3{\mathrm{COO}}^{-},C{\mathrm{l}}^{-}$                    [2024]

• ${}^{-}\mathrm{OH}>\mathrm{R}\overline{\mathrm{O}}>{\mathrm{CH}}_3\mathrm{CO}\overline{\mathrm{O}}>\mathrm{C}\overline{\mathrm{l}}$

   

• $\mathrm{C}\overline{\mathrm{l}}>\mathrm{R}\overline{\mathrm{O}}>{}^{-}\mathrm{OH}>{\mathrm{CH}}_3\mathrm{CO}\overline{\mathrm{O}}$

   

• $\mathrm{R}\overline{\mathrm{O}}>{}^{-}\mathrm{OH}>{\mathrm{CH}}_3\mathrm{CO}\overline{\mathrm{O}}>\mathrm{C}\overline{\mathrm{l}}$

   

• $\mathrm{C}\overline{\mathrm{l}}>{}^{-}\mathrm{OH}>\mathrm{R}\overline{\mathrm{O}}>{\mathrm{CH}}_3\mathrm{CO}\overline{\mathrm{O}}$

   

Q 2 :

The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is:                         [2024]

 

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}, {\mathrm{CH}}_3\mathrm{COOH}, {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COOH}, \mathrm{HCOOH}$

• ${\mathrm{CH}}_3\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COOH}>\mathrm{HCOOH}$

   

• $\mathrm{HCOOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}>{\mathrm{CH}}_3\mathrm{COOH}$

   

• $\mathrm{HCOOH}>{\mathrm{CH}}_3\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COOH}$

   

• ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}>{\mathrm{CH}}_3\mathrm{COOH}>\mathrm{HCOOH}$

Q 3 :

Which of the following has highly acidic hydrogen?                    [2024]

 

Q 4 :

The ascending order of acidity of —OH group in the following compounds is:                        [2024]

Choose the correct answer from the options given below:

• (A) < (D) < (C) < (B) < (E)

   

• (A) < (C) < (D) < (B) < (E)

   

• (C) < (A) < (D) < (B) < (E)

   

• (C) < (D) < (B) < (A) < (E)

   

Q 5 :

The ascending acidity order of the following H atoms is:                    [2024]

• A < B < C < D

   

• D < C < B < A

   

• A < B < D < C

   

• C < D < B < A

   

Q 6 :

Match List I with List II                                                     [2024]

LIST I (Compound)	LIST II (${\mathrm{pK}}_{\mathrm{a}}$ value)
A. Ethanol	I. 10.0
B. Phenol	II. 15.9
C. m-Nitrophenol	III. 7.1
D. p-Nitrophenol	IV. 8.3

 

Choose the correct answer from the options given below:

• A-I, B-II, C-III, D-IV

   

• A-II, B-I, C-IV, D-III

   

• A-III, B-IV, C-I, D-II

   

• A-IV, B-I, C-II, D-III

   

Q 7 :

                                                    [2024]

• Pyrrole > Pyridine > Piperidine  

   

• Pyridine > Piperidine > Pyrrole

   

• Piperidine > Pyridine > Pyrrole  

   

• Pyrrole > Piperidine > Pyridine

   

Q 8 :

The compounds that produce ${\mathrm{CO}}_2$ with aqueous ${\mathrm{NaHCO}}_3$ solution are:                      [2025]

Choose the correct answer from the options given below:

• (A), (C) and (D) only

   

• (A) and (C) only

   

• (A), (B) and (E) only

   

• (A) and (B) only

   

Q 9 :

The least acidic compound, among the following is:                       [2025]

• D

   

• A

   

• B

   

• C

   

Q 10 :

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

Assertion A: Order of acidic nature of the following compounds is A > B > C.

Reason R: Fluoro is a stronger electron withdrawing group than Chloro group.  

In the light of the above statements, choose the correct answer from the options given below:           [2023]

• A is true but R is false

   

• Both A and R are correct and R is the correct explanation of A

   

• A is false but R is true

   

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

   

Q 11 :

Find out the statements which are not true.                                                  [2026]

A. Resonating structures with more number of covalent bonds and lesser charge separation are more stable.
B. In electromeric effect, an unsaturated system shows +E effect with nucleophile and −E effect with electrophile.
C. Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds.
D. The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.
E. Stability of carbanion increases with the increase in s-character of the carbon carrying the negative charge.

Choose the correct answer from the options given below:

• B & D only

   

• B, D & E only

   

• A, D & E only

   

• A, C & D only

   

Q 12 :

Which of the following incorrectly represent the acidic strength of given acids?

• 

   

• 

   

• ${\mathrm{CH}}_2\mathrm{FCOOH}>{\mathrm{CH}}_2{\mathrm{NO}}_2\mathrm{COOH}$

   

• ${\mathrm{CH}}_3\mathrm{COOH}>{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$

   

Q 13 :

Assertion (A):

both compounds will have zero dipole moment.

Reason (R): –CN group is linear but –SH group is non linear with benzene ring.

• Assertion (A) is True, Reason (R) is True; Reason (R) is a Correct explanation for Assertion (A)

   

• Assertion (A) is True, Reason (R) is True; Reason (R) is NOT a Correct explanation for Assertion (A)

   

• Assertion (A) is True, Reason (R) is False

   

• Assertion (A) is False, Reason (R) is True

   

Q 14 :

Aromatic species among the following is

Q 15 :

Compare basic strength of below compounds?

[IMAGE 228]

• A > B > C

   

• B > A > C

   

• C > A > B

   

• C > B > A