Basic Organic Chemistry

How many sigma and pi bonds are present in CH₂=C=CHCH₃

• 6 sigma and 2 pi

• 9 sigma and 2 pi

• 7 sigma and 4 pi

What is the type of hybridization of each carbon in CH3CN ?

• Sp³,sp²

• Sp², sp

• Sp³, sp

Nucleophile is a species that should have

• Positive charge

• A pair of electrons to donate

• Electron deficient species

Electrophiles are electron seeking species. Which of the following is an example for an electrophile.

• NH3

• H2O

• AlCl3

The stability of carbocation follows the order:

• Primary> Secondary>Tertiary> Methyl

• Secondary>Tertiary> Primary> Methyl

• Tertiary > Secondary> Primary > Methyl

Chemical species bearing a negative charge on carbon and possessing eight electrons in its valence shell are called ------------.

• Carbocations

• Carbanions

• Free radicals

Heterolytic fission results in the formation of-

• Cations

• Anions

• Both cations and anions

Nucleophiles donate its pair of electrons to electron deficient species and hence behave as:

• Lewis bases

• Lewis acids

• Bronsted acids

The change in hybridization affects electronegativity of carbon. Arrange C(sp3), C(sp2) and C(sp) in the increasing order of electronegativity.

• C(sp3)<C(sp2) <C(sp)

• C(sp3)< C(sp) <C(sp2)

• C(sp)< C(sp2) <C(sp3)

Carbocations have ------------- shape with positively charged carbon being sp2 hybridised.

• Tetrahedral

• Trigonal planar

• linear