Some Chemical Reactions MCQs with Answers

Ammonia reacts with carbon dioxide to form which compound?

• A.Ammonium nitrate
• B.Ammonium sulfate
• C.Urea
• D.Nitric acid

In the chlorination of benzene, which reagent is used?

• A.H₂SO₄
• B.AlCl₃
• C.FeCl₃
• D.NaOH

Addition of water to alkenes in the presence of H₂SO₄ is termed as _?

• A.Dehydration
• B.Hydrogenation
• C.Hydrolysis
• D.Hydration

When the magnitude of Kc is small, it indicates ?

• A.Reaction mixture contains equal amounts of reactants and products
• B.Reaction mixture contains mostly products
• C.Reaction mixture contains mostly reactants
• D.Reaction has gone to completion

Ethanol is converted into ethanoic acid by _?

• A.Oxidation
• B.Reduction
• C.Hydrogenation
• D.Dehydration

Which two elements are essential for the process of rusting to occur?

• A.Water and carbon dioxide
• B.Water and oxygen
• C.Oxygen and nitrogen
• D.Water and nitrogen

In an acidic medium, phenolphthalein is colourless and in a basic medium, it is ?

• A.Blue
• B.Pink
• C.Yellow
• D.Green

Oxidation of secondary alcohols produces?

• A.Aldehydes
• B.Esters
• C.Carboxylic acids
• D.Ketones

In the equilibrium mixture, the concentration of hydrogen and iodine is 0.04 moles per dm³, while that of hydrogen iodide is 0.08 moles per dm³. The Kc of the following given reaction will be equal to: H₂ (g) + I₂ (g) ⇌ 2HI (g)?

• A.2
• B.4
• C.8
• D.16

When NaCl is dissolved in water the sodium ions are _?

• A.Oxidised
• B.Reduced
• C.Hydrated
• D.Precipitated