NEET Acids & Bases - Definitions & Classification Practice Questions With Solutions

NEET Chemistry Acids & Bases - Definitions & Classification Practice Questions

Biology Physics

Question 1.

Amongst the given option which of the following molecules/ion acts as a Lewis acid?

A\(\text{OH}^- \)

B\(\text{NH}_3 \)

C\(\text H_2 \text O \)

D\(\text{BF}_3 \)

Question 2.

A Lewis base among the following is:

ABF₃

BPF₃

CCF₄

DSiF₄

Question 3.

Boric acid is an acid because its molecule:

Acontains replaceable H⁺ ion.

Bgives up a proton.

Caccepts OH^– from water releasing proton into the solution.

Dcombines with protons from water molecules.

Question 4.

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence:

A

B C l_{3} > B F_{3} > B B r_{3}

B

B B r_{3} > B C l_{3} > B F_{3}

C

B B r_{3} > B F_{3} > B C l_{3}

D

B F_{3} > B C l_{3} > B B r_{3}

Question 5.

Which of the following molecular hydrides acts as a Lewis acid?

A

N H_{3}

B

H_{2} O

C

B_{2} H_{6}

D

C H_{4}

Question 6.

The ionic species that has the greatest proton affinity to form stable compound is:

A

H S^{-}

B

N H_{2}^{-}

C

F^{-}

D

l^{-}

Question 7.

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

A

H O C l < H O C l O < H O C l O_{2} < H O C l O_{3}

B

H O C l O < H O C l < H O C l O_{3} < H O C l O_{2}

C

H O C l O_{2} < H O C l O_{3} < H O C l O < H O C l

D

H O C l O_{3} < H O C l O_{2} < H O C l O < H O C l

Question 8.

A compound, among the following, that cannot be classified as a protonic acid is:

AB(OH)₃

BPO(OH)₃

CSO(OH)₂

DSO₂(OH)₂

Question 9.

Conjugate acid of NH₂^– is:

ANH₄OH

BNH₄⁺

C\(NH_{2}^{-}\)

DNH₃

Question 10.

Among the following examples, the species that behave(s) as a Lewis acid is/are: \(\mathrm{BF}_3, \mathrm{SnCl}_2, \mathrm{SnCl}_4\)

AStannous chloride, Stannic chloride

B

B F_{3}

, Stannous chloride

COnly

B F_{3}

D

B F_{3}

, Stannous chloride, Stannic chloride

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