Electrophile

Q.

What do you mean by polar protic and polar aprotic solvents? What are some examples of these?

Q. All electrophiles are lewis bases and all nucleophiles are lewis acids.

1. False
2. True

Q.

What makes good electrophile?

Q. Which of the following are non-polar solvents?

1. $C_6{H}_6,C{H}_{3}COC{H}_3$
2. $C{H}_{3}SOC{H}_3,C_6{H}_6$
3. $CC{l}_4,C_6{H}_6$
4. None of the above

Q.

Which of the following is a neutral electrophile?

1. $O{H}^{\ominus }$

2. $R-O^{\ominus }$

3. $AlC{l}_3$

4. $B{H}_3$

Q. Hydrogen bonding plays a central role in which of the following phenomena?

1. Ice floats in water
2. Dimerisation of acetic acid in benzene
3. Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions
4. Formic acid is more acidic than acetic acid

Q. All electrophiles are lewis bases and all nucleophiles are lewis acids.

1. False
2. True

Q. Hydrogen bonding plays a central role in which of the following phenomena?

1. Ice floats in water
2. Formic acid is more acidic than acetic acid
3. Dimerisation of acetic acid in benzene
4. Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions

Q.

The conductometric titration curve for $C{H}_{3}COOH$ against $NaOH$ can be given as

Q.

The correct statement regarding electrophile is

1. Electrophile is a negatively charge species and can form a bond by accepting a pair of electrons from a nucleophile

2. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

3. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

4. Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile

Q. Which of the following are non-polar solvents?

1. $C_6{H}_6,C{H}_{3}COC{H}_3$
2. $C{H}_{3}SOC{H}_3,C_6{H}_6$
3. $CC{l}_4,C_6{H}_6$
4. None of the above

Q. Which one of the following statement is/are correct?

1. A polar solvent has non-zero dipole moment
2. A polar solvent has zero dipole moment
3. $C{H}_{3}OH,H_{2}O,C{H}_{3}COC{H}_3$ are polar solvents
4. (a) and (c) above.

Q. The correct statement regarding electrophile is:

1. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
2. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a electrophile
3. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
4. Electrophile can either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile

Q. Which of the following statement is not correct for a Polar protic solvent?

1. Solvents which do not readily donate H+
2. Solvents which readily donate $H^{+}$
3. Methanol and water are polar protic solvent
4. H-bonding is present in polar protic solvent

Q. Freidal-Crafts reaction is not given by

1. $C_6{H}_5-N{O}_2$
2. $C_6{H}_5-C{H}_3$
3. $C_6{H}_5-C{H}_3$
4. $C_6{H}_5-Cl$

Q.

Which of the following is/are electrophile?

1. $AlC{l}_3$

2. $B{F}_3$

3. $\stackrel{\oplus }{N}{O}_2$

4. $R-\underset{..}{\stackrel{..}{S}}-H$

Q. The correct statement regarding electrophile is:

1. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
2. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a electrophile
3. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
4. Electrophile can either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile

Q. Freidal-Crafts reaction is not given by

1. $C_6{H}_5-N{O}_2$
2. $C_6{H}_5-C{H}_3$
3. $C_6{H}_5-C{H}_3$
4. $C_6{H}_5-Cl$