Electrophilic addition reactions proceed in two steps. The first step involves the addition of an electrophile. The major intermediate formed in the first step is -

H3C-HC=CH2+H+?

1. 2° carbanion

2. 1° carbocation

3. 2° carbocation

4. 1° carbanion

Subtopic:  Nucleophile & Electrophile |
 69%
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The addition of HCl to an alkene proceeds in two steps. The first step is the attack of H+ ion on the double bond portion. The same can be shown as-

1. 2.
3. 4. All of these are possible
Subtopic:  Nucleophile & Electrophile |
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Electrophiles are electron-seeking species. Which of the following groups contain only electrophiles?

(a). BF3, NH3, H2O

(b). AlCl3, SO3 , NO2+

(c). NO2+ , CH3+, CH3-C+=O

(d) C2H5-, , C2H5+

Choose the correct option

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, d)

Subtopic:  Nucleophile & Electrophile |
 78%
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A nucleophile is a species that should have

(a) A pair of electrons to donate

(b) Positive charge

(c) Negative charge

(d) Electron-deficient species

Choose the correct option

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, c)

Subtopic:  Nucleophile & Electrophile |
 88%
From NCERT
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