Some Chemical Reactions MCQs with Answers

Aldol condensation occurs between _?

• A.Two aldehydes or two ketones having α-hydrogen atoms
• B.One aldehyde and one ketone having α-hydrogen atoms
• C.An aldehyde and a ketone where at least one has α-hydrogen atoms
• D.All of these

The product of esterification is?

• A.Carboxylic acid
• B.Alcohol
• C.Ester
• D.Water

Corrosion occurs at the?

• A.Anode
• B.Cathode
• C.Electrolyte
• D.Both anode and cathode equally

In constructive reaction _ molecules are formed.

• A.Small
• B.Large
• C.Medium
• D.None of these

Which of the following statements is true?

• A.NaOH is named as caustic soda because it turns red litmus blue
• B.NaOH is named as caustic soda because it is a weak base
• C.NaOH is named as caustic soda because it is found in nature as a mineral
• D.NaOH is named as caustic soda because it reacts with fats to form soap

A catalyst ?

• A.Increases the activation energy
• B.Alters the reaction mechanism
• C.Is consumed during the reaction
• D.Shifts the equilibrium position

When acids react with carbonates, gas is produced.

• A.Oxygen
• B.Hydrogen
• C.Carbon dioxide
• D.Nitrogen

Salt of bromide when treated with HCl, KMnO₄, and CCl₄ gives brown layer of Br₂. In this reaction Br⁻ is oxidized into Br₂ by?

• A.HCl
• B.KMnO₄
• C.CCl₄
• D.None of these

Oxidation of a tertiary alcohol generally gives?

• A.Aldehyde
• B.Ketone
• C.Carboxylic acid
• D.No reaction

Change in meat's smell after it is out in the sun for some time is a _?

• A.Physical change
• B.Temporary change
• C.Reversible change
• D.Chemical change