Electrophile

Q.

Define polar and non-polar solvents?

Q.

What are electrophiles and nucleophiles? Explain with examples.

Q.

Lipids are insoluble in water because lipid molecules are _________

1. Hydrophilic

2. Hydrophobic

3. Neutral

4. Zwitter ions

Q. The mixture which shows negative deviation from Raoult's law is:

1. Acetone + Aniline
2. Benzene + Toluene
3. Benzene + Acetone
4. Ethanol + Water

Q. 18.When a Fecl3 solution is added to NaOH, a negatively charged SOL is obtained it is due to 1)the preferential adsorption of OH ions 2) presence of basic group 3)Self dissociation 4) electron capture by sol particles

Q. What is the Reactivity order and stability order of single, double and triple bond?

Q.

Which of the following is/are electrophile?

1. 

2. 

3. 

4. 

Q.

Is free radical electrophilic?

Q.

Which of the following is an electrophile?

1. 

2. 

3. 

4. ROR

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.

I- ion react with iodine in aqueous solution to form I3- ion .When 1L of solution containing 1mole of KI and 0.25 mol of I2 was reacted with excess of AgNO3 , 0.80 mol of yellow precipitate was formed.The stability constant of. I3- ion is

Q.

Is water an electrophile?

Q.

Is HBr an electrophile?

Q.

Identify the reagents shown in bold in the following equations as nucleophiles or electrophiles:

Q.

How to determine the strength of neuclophiles and electrophiles in a reaction mechanism.

Q.

Which of the following is a neutral electrophile?

1. 

2. 

3. 

4. 

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

Q. Which is not an electrophile?

1. $N{H}_4^{+}$
2. $BC{l}_3$
3. $H^{+}$
4. $B{H}_3$

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

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

Q.

What are electrophiles and nucleophiles? Explain with examples.

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. Which of the following is incorrect statement for the given reaction?

1. Rate of formation of II and IV would be identical
2. Rate of formation of I would be slower than that of III
3. Formation of I would show primary isotope effect
4. Formation of III involves E1 reaction

Q.

Is ${\mathrm{SO}}_3$ an electrophile?

Q. Which of the following reaction is used in the purification of aldehydes from other organic compounds?

1. Addition of $NaHS{O}_3$ to aldehydes
2. Addition of $HCN$ to aldehydes
3. Addition of grignard's reagent to aldehydes
4. None of the above

Q. Which one of the following series contains only electrophiles?

1. $H_{2}O,S{O}_3,H_3{O}^{+}$
2. $H_{2}O,N{H}_3,AlC{l}_3$
3. $AlC{l}_3,S{O}_3,N{O}_2^{+}$
4. $H_{2}O,C{l}^{+},N{H}_3$

Q.

Write a chemical equation to illustrate the acidic nature of nitric acid?

Q. Identify electrophilic centre in the following:
1. $C{H}_{3}CH=O$
2. $C{H}_3-CN$
3. $C{H}_{3}I$

1. Among $\stackrel{\downarrow }{C}{H}_{3}CH=O,H_{3}C-\stackrel{\downarrow }{C}\equiv N$, and $H_3\stackrel{\downarrow }{C}-I$
2. Among $C{H}_3\stackrel{\downarrow }{C}H=O,H_3\stackrel{\downarrow }{C}-C\equiv N$, and $H_3\stackrel{\downarrow }{C}-I$
3. Among $C{H}_3\stackrel{\downarrow }{C}H=O,H_{3}C-\stackrel{\downarrow }{C}\equiv N$, and $H_3\stackrel{\downarrow }{C}-I$
4. Among $\stackrel{\downarrow }{C}{H}_{3}CH=O,H_3\stackrel{\downarrow }{C}-C\equiv N$, and $H_3\stackrel{\downarrow }{C}-I$

Q.

What is electrophile and nucleophile?