Amines as Bases

Q. The correct decreasing order of basic strength of following compounds is:

1. A > B > C > D
2. B > A > C > D
3. C > B > A > D
4. C > B > D > A

Q. Choose the correct order of basic strength of given anilines.

1. o-nitroaniline > p-nitroaniline > m-nitroaniline
2. m-nitroaniline > p-nitroaniline > o-nitroaniline
3. m-nitroaniline > o-nitroaniline > p-nitroaniline
4. o-nitroaniline > m-nitroaniline > p-nitroaniline

Q. The decreasing order of basic strength of the given compounds is :

1. C > B > D > A
2. C > B > A > D
3. A > B > D > C
4. A > B > C > D

Q. Rank in the order of increasing basic strength.

1. (c) < (b) < (a)
2. (a) < (b) < (c)
3. (c) < (a) < (b)
4. (b) < (a) < (c)

Q. Find the correct order of basic strength of the following compounds.

1. (c) < (d) < (a) < (b)
2. (b) < (a) < (d) < (c)
3. (a) < (c) < (d) < (b)
4. (d) < (b) < (a) < (c)

Q. When the following compound reacts with 1 mole of $HCl$:

1. Protonation takes place at Nitrogen 1
2. Protonation takes place at nitrogen 2
3. Protonation cannot take place
4. Protonation takes place at both the nitrogens

Q. The correct decreasing order of basic strength of following compounds is:

1. A > B > C > D
2. B > A > C > D
3. C > B > A > D
4. C > B > D > A

Q. Which of the following compounds will not give effervescence $\left(C{O}_2\right)$ with $NaHC{O}_3$?

1. 
2. 
3. 
4. 

Q.

Then the formula of C₃H₉N is

1. CH₃ - CH₂ - CH₂ - NH₂
2. CH₃ - CH(NH₂) - CH₃
3. CH₃ - NH- CH₂ - CH₃
4. (CH₃)₃N

Q. Which of the following is the most basic of the given compounds ?

1. 
2. 
3. 
4. All are equally basic.

Q. The correct order of the decreasing order of basic strengths of the following compounds is:

1. I > II > III
2. II> III > I
3. III > II > I
4. II > I > III

Q. The correct order of basic nature is given in:

1. 
2. 
3. $C{H}_3-N{H}_2<C{H}_3-NH-C{H}_3<{\left(C{H}_3\right)}_{3}N$ (in non − polar medium)
4. ${\left(C{H}_3\right)}_{2}NH>C{H}_{3}N{H}_2>{\left(C{H}_3\right)}_{3}N$ (in polar medium)

Q. Arrange the following amines in the decreasing order of basicity:

1. I>II>III
2. III>II>I
3. I>III>II
4. III>I>II

Q. Choose the correct order(s) of basic strengths of given amines in aqueous phase.

1. $(C{H}_3{)}_{2}NH>C{H}_{3}N{H}_2>(C{H}_3{)}_{3}N>N{H}_3$
2. $(C_3{H}_7{)}_{3}N>(C_3{H}_7{)}_{2}NH>C_3{H}_{7}N{H}_2>N{H}_3$
3. $C_2{H}_{5}N{H}_2>(C_2{H}_5{)}_{3}N>(C_2{H}_5{)}_{2}NH>N{H}_3$
4. $(C_2{H}_5{)}_{2}NH>(C_2{H}_5{)}_{3}N>C_2{H}_{5}N{H}_2>N{H}_3$

Q. The increasing order of basicity of the following compounds is:

1. (d)<(b)<(a)<(c)
2. (a)<(b)<(c)<(d)
3. (b)<(a)<(c)<(d)
4. (b)<(a)<(d)<(c)

Q. Arrange the given compounds in decreasing order of their basicity.

1. (i) > (ii) > (iii)
2. (iii) > (ii) > (i)
3. (ii) > (iii) > (i)
4. (i) > (iii) > (ii)

Q. Compare basic strengths of the following compounds :

1. A > B > C
2. B > A > C
3. C > A > B
4. C > B > A

Q. When the following compound reacts with 1 mole of $HCl$:

1. Protonation takes place at Nitrogen 1
2. Protonation takes place at nitrogen 2
3. Protonation cannot take place
4. Protonation takes place at both the nitrogens

Q. In air, the most basic amine among the following is:

1. $C_2{H}_{5}N{H}_2$
2. $C{H}_{3}N{H}_2$
3. $(C{H}_3{)}_{2}NH$
4. $(C{H}_3{)}_{3}N$

Q. Indicate which nitrogen in each of these bases is the one most likely to be protonated? Are they more basic than regular amines?
Choose the correct options:

1. Guanidine is the most basic of the three
2. DABCO is the most basic of the three
3. DBN is the most basic of the three
4. These are all less basic than amines.

Q. In sets $a-d$, only one of the set is incorrect regarding basic strength. Select it:

1. 
2. 
3. 
4. 

Q. In the following compounds, the decreasing order of basic strength will be:

1. $C_2{H}_{5}N{H}_2>N{H}_3>(C_2{H}_5{)}_{2}NH$
2. $N{H}_3>C_2{H}_{5}N{H}_2>(C_2{H}_5{)}_{2}NH$
3. $(C_2{H}_5{)}_{2}NH>C_2{H}_{5}N{H}_2>N{H}_3$
4. $(C_2{H}_5{)}_{2}NH>N{H}_3>C_2{H}_{5}N{H}_2$

Q. Arrange the given compounds in the decreasing order of their basic strengths:

1. B > A > C > D
2. A > C > B > D
3. C > A > B > D
4. A > B > C > D

Q.

Assertion (A): Sulphanilic acid exists as dipolar ion where as p - amino benzoic acid does not

Reason (R): Carboxy group being more acidic than - SO₃H group can easily transfer a H⁺ to the amino group

1. A and R are true and R is the correct explanation of A
2. A and R are true and R is not the correct explanation of A
3. A is true, R is false
4. A is false, R is true

Q. Consider the following compound:

1. Nitrogen A is more basic than Nitrogen B.
2. Nitrogen A is less basic than Nitrogen B.
3. Nitrogen A is equally basic as Nitrogen B.
4. Nothing can be said about basicity.

Q.

The basic character of ethyl amine, diethyl amine and triethyl amine in chlorobenzene is

1. $C_2{H}_{5}N{H}_2<(C_2{H}_5{)}_{2}NH<(C_2{H}_5{)}_{3}N$

2. $C_2{H}_{5}N{H}_2<(C_2{H}_5{)}_{3}N<(C_2{H}_5{)}_{2}NH$

3. $(C_2{H}_5{)}_{3}N<(C_2{H}_5{)}_{2}NH<C_2{H}_{5}N{H}_2$

4. $(C_2{H}_5{)}_{3}N<C_2{H}_{5}N{H}_2<(C_2{H}_5{)}_{2}NH$

Q. Among the following, the strongest base is:
(IIT-JEE, 2000)

1. $C_6{H}_{5}N{H}_2$
2. $p-N{O}_2{C}_6{H}_{4}N{H}_2$
3. $m-N{O}_2{C}_6{H}_{4}N{H}_2$
4. $C_6{H}_{5}C{H}_{2}N{H}_2$

Q.

Which is most basic?

1. aniline

2. N, N-dimethylaniline

3. benzylamine

4. p-nitroaniline

Q. Choose the correct statement(s) related to the basic strength of (a) and (b).

1. (a) is less basic than (b) due to SIP effect.
2. (a) is more basic than (b) due to SIR effect
3. $N{O}_2$ will increase the electron density on N and make them more basic
4. $N{O}_2$ will decrease the electron density on N and make them less basic.

Q.

Correct statements regarding 'D' is

1. It is called sulphonic acid

2. It exists as zwitter ion in aqueous solution

3. It is an amino acid

4. It is used as rubber in industry