Some Chemical Reactions MCQs with Answers

Which type of chemical reaction is the following? CaO + CO₂ → CaCO₃

• A.Displacement Reaction
• B.Decomposition Reaction
• C.Combination Reaction
• D.Double Displacement Reaction

Which of the following react with Tollen's reagent?

• A.CH₃CHO
• B.CH₃COCH₃
• C.CH₃CH₂OH
• D.CH₃COOH

Past Paper MCQ

What is the reaction called when an acid reacts with a base to form salt and water?

• A.Precipitation reaction
• B.Oxidation reaction
• C.Reduction reaction
• D.Neutralization reaction

Chemical reaction requires particular conditions to carry down at proper rate, especially?

• A.Color and Odor
• B.Volume and Density
• C.Mass and Weight
• D.Temperature and Pressure

What does "dehydration" mean?

• A.Removal of water
• B.Addition of water
• C.Removal of oxygen
• D.Addition of minerals

Hydrogenation of cis-2-butene produces _?

• A.Benzene
• B.Butene
• C.Butyne
• D.Butane

It is the minimum amount of energy required to initiate a chemical reaction ?

• A.Activation energy
• B.Kinetic energy
• C.Potential energy
• D.Ionization energy

The color of KMnO₄ entirely disappears by the action of reducing agent in _?

• A.Acidic medium
• B.Basic medium
• C.Neutral medium
• D.All of these

Esterification is a chemical reaction that occurs between?

• A.Alcohol + Carboxylic acid
• B.Alcohol + Hydrochloric acid
• C.Aldehyde + Carboxylic acid
• D.Ketone + Alcohol

In an endothermic reaction, the heat content of the _?

• A.System remains unchanged
• B.Reactants is more than that of products
• C.Products and reactants is the same
• D.Products is more than that of reactants