Some Chemical Reactions MCQs with Answers

Addition reaction is also known as ?

• A.Combination reaction
• B.Synthesis reaction
• C.Both A and B
• D.Decomposition reaction

When hydrogen reacts with nitrogen, it forms?

• A.Ammonia
• B.Nitric acid
• C.Nitrous oxide
• D.Ammonium nitrate

A reaction in which a new single compound is formed by the union of two or more substances is known as?

• A.Addition reaction
• B.Decomposition reaction
• C.Displacement reaction
• D.Neutralization reaction

Oxygen combines with other elements and produces what is called oxidation or burning. When oxidation is very quick (may be sudden), what is it called in science?

• A.Combustion
• B.Rusting
• C.Fermentation
• D.Sublimation

Acid + Base → ?

• A.Salt + Water
• B.Salt + Hydrogen
• C.Water + Carbon Dioxide
• D.Salt + Oxygen

A substance which liberates energy on burning is called ?

• A.Reducer
• B.Oxidizer
• C.Catalyst
• D.Fuel

Homogeneous liquid equilibria:

• A.Is always affected by temperature change
• B.Is never affected by temperature change
• C.May or may not be affected by temperature change
• D.Is affected only by pressure change

Methyl ketones are characterized by _?

• A.Iodoform test
• B.Tollens' test
• C.Fehling's test
• D.Benedict's test

Past Paper MCQ

Fission reaction is which type of reaction?

• A.Physical
• B.Chemical
• C.Biological
• D.None of these

What is the balanced chemical equation for the following reaction? H₂(g) + O₂(g) → 2H₂O(g)

• A.2H₂ + 2O₂ → 2H₂O
• B.H₂ + O₂ → H₂O
• C.2H₂ + O₂ → 2H₂O
• D.H₂ + 2O₂ → 2H₂O