Amines as Bases

Q.

Basic Character decreases along the period from left to right acidic character decreases down the group?

1. True

2. False

Q. Write balance equation of K2Cr2O7+HCl

Q.

The increasing order of pK_b values of the following compounds is:

1. $\mathrm{I}<\mathrm{II}<\mathrm{III}$$<\mathrm{IV}$

2. $\mathrm{II}<\mathrm{IV}<\mathrm{III}<\mathrm{I}$

3. $\mathrm{I}<\mathrm{II}<\mathrm{IV}<\mathrm{III}$

4. $\mathrm{II}<\mathrm{I}<\mathrm{III}<\mathrm{IV}$

Q. How much sulphuric acid is obtained from 5kg of pure sulphur.( s8)

Q. Which one of the following is the weakest base in gaseous phase?

1. Triethylamine
2. Ethylamine
3. Diethylamine
4. Ammonia

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

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

Q.

With what neutral molecule is ${\mathrm{ClO}}^{-}$ isoelectronic? Is that molecule a Lewis base?

Q. Which nitrogen in the given compound will get protonated first?

1. (1)
2. (2)
3. (3)
4. (4)

Q. let the r.m.s velocity of nitrogen molecules at a temperature t^° C be v†extbullet.suppose all the molecules dissociate into atoms when temperature is raised to (2t+273)^° c, then the new most proba

Q. 94.In between CH3COOH and CH3COO- ion , which one is more resonance stabilised and why?

Q. Choose the incorrect order 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.

Carbon shows tetravalency by undergoing:

1. sp³ hybridization

2. d²sp³ hybridization

3. sp²d hybridization

4. sp³ dhybridization

Q. 17. How to balance this equation BaCl +H2SO4 =BaSO4 +HCL

Q. Calomel on reaction with NH4OH gives

Q. Maximum $p{K}_b$ value is of

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

Q.

The correct order of basicity of the following compound is :

1. (b)<(a)<(c)<(d)

2. (b)<(a)<(d)<(c)

3. (d)<(b)<(a)<(c)

4. (a)<(b)<(c)<(d)

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. 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. 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. 19. 10 ml of hydrogen peroxide solution labelled 10 volume just decolorises 100ml of acidified potassium permanganate solution. The normality of KMnO4 solution is

Q. For any value of alkyl group (R), the correct order of basic character of the $1^o,2^o,3^o$ amines and $N{H}_3$ in gaseous phase of non polar solvent is:

1. $3^o>2^o>N{H}_3>1^o$
2. $3^o>2^o>1^o>N{H}_3$
3. $2^o>3^o>N{H}_3>1^o$
4. $1^o>2^o>3^o>N{H}_3$

Q.

The correct order of increasing basicity is

$C{H}_3\underset{I}{C{H}_2}N{H}_{2}C{H}_3\stackrel{\stackrel{NH}{||}}{\underset{II}{C}}C{H}_3\stackrel{\stackrel{O}{||}}{\underset{III}{C}}N{H}_2$

1. II < III < I

2. $I\approx III<II$

3. I < II < III

4. III < I < II

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. How to find out the stability of carbocation? How to find out hybridization in carbon atoms? How to find out the major and minor products otherthan chlorination and bromination?

Q. WHY DO HALOGEN SHOW +R OR +M GROUP if it has only 1 electron requirment for octet then why would they donate electron ?

Q. Arrange the given amine compounds in decreasing order of basic strength.

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

Q. Hybridization of phenyl carbocation

Q. For the following compound :


Choose the correct statement :

1. Nitrogen 1 is the most basic.
2. Nitrogen 2 is the most basic.
3. Nitrogen 3 is the most basic.
4. All nitrogens are equally basic.

Q. Which nitrogen in the given compound will get protonated first?

1. (1)
2. (2)
3. (3)
4. (4)

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

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