Some Chemical Reactions MCQs with Answers

Which one of the following gas is released when zinc (Zn) reacts with sulphuric acid (H₂SO₄)?

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

When most fuels burn, the products include CO₂ and _?

• A.Carbon monoxide
• B.Oxygen
• C.Nitrogen
• D.Water

A hydrocarbon, which is a liquid at room temperature, decolorizes aqueous bromine. What could be the molecular formula of the compound?

• A.C₆H₆
• B.C₁₀H₂₀
• C.C₅H₁₂
• D.C₂H₂

_ is not an organic addition reaction.

• A.Halogenation
• B.Hydrogenation
• C.Dehydration
• D.Hydrohalogenation

Le Chatelier's principle states that when a stress is applied to a system in equilibrium, the system will the stress.

• A.Adjust to reduce
• B.Amplify
• C.Ignore
• D.Reverse

Which reagent and condition are used to bring about the reaction shown? Toluene → p-chloro toluene

• A.HCl in the presence of AlCl₃
• B.Cl₂ in the presence of FeCl₃
• C.Cl₂ in the presence of sunlight
• D.Cl₂ in the presence of AlCl₃

Acid, when treated with metals, produces salt and ?

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

A container containing two moles of liquid ethanol and six moles of oxygen gas were sparked together to form CO₂ and H₂O. Identify the limiting reagent.

• A.Ethanol
• B.Oxygen
• C.Both ethanol and oxygen
• D.Neither ethanol nor oxygen

Which element is used in the thermite process due to its properties?

• A.Iron
• B.Aluminum
• C.Copper
• D.Zinc

K is called the specific rate constant because it is ?

• A.Rate per unit concentration
• B.Rate per unit time
• C.Rate per unit temperature
• D.Rate per unit volume