Chemistry MCQ Set 5

Question : Cracking is a process in which

1. Large molecules are broken down into smaller molecules.
2. Smaller molecules are joined into larger molecules.
3. Open chain carbon molecules are changed to cyclic molecules.
4. Close chain molecules are change into open chain.

Question : Organic compounds are produced in nature in

1. Plants only
2. Animals only
3. Atmosphere
4. Both (A) and (B)

Question : In benzene molecule each ring carbon is

1. sp² hybridized
2. sp³ hybridized
3. sp hybridized
4. not hybridized

Question : Hydrocarbons containing one sigma and one pi(π) bonds are called

1. Alkanes
2. Alkenes
3. Alkynes
4. Aromatic hydrocarbon

Question : With AICI₃ as catalyst, benzene reacts with Alkyl and Acyl chloride giving alkylated and acylated benzene respectively. This reaction is known as

1. Friedal and Crafts reaction
2. Nitration reaction
3. Halogenation reaction
4. Aldol condensation

Question : A carbon atom carrying a negative charge and attached to three other atoms or groups is called

1. Oxonium ion
2. Carbonium ion
3. Carbanion
4. Carbene