Some Chemical Reactions MCQs with Answers

The system is in stable equilibrium when ?

• A.Qc < Kc
• B.Qc > Kc
• C.Qc = Kc
• D.Qc = 0

Oxidation of a primary alcohol on further reaction gives?

• A.Aldehyde
• B.Ketone
• C.Carboxylic acid
• D.Ester

Consider the following reaction in equilibrium and tell addition of which chemical will turn the cloudy solution into clear solution? BiCl₃ + H₂O ⇌ BiOCl + 2HCl

• A.HCl
• B.NaOH
• C.H₂O
• D.BiCl₃

For which system does the equilibrium constant, Kc have units of concentration?

• A.H₂(g) + I₂(g) ⇌ 2HI(g)
• B.N₂(g) + O₂(g) ⇌ 2NO(g)
• C.N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
• D.H₂(g) + Cl₂(g) ⇌ 2HCl(g)

The bread dough rises during alcoholic fermentation is due to _?

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

In neutralization ?

• A.an acid and a base react to form salt and water
• B.H⁺ ions from acid combine with OH⁻ ions from base
• C.heat is released (exothermic reaction)
• D.All of these

During a chemical reaction, the rate at which a solid substance reacts:

• A.Increases with passage of time
• B.Decreases with passage of time
• C.Remains constant throughout the reaction
• D.First increases then becomes constant

In Cannizzaro reaction, formaldehyde reacts with which reagent?

• A.NaOH
• B.HCl
• C.H₂SO₄
• D.KMnO₄

Water gas is the mixture of ?

• A.Carbon monoxide and nitrogen
• B.Carbon dioxide and hydrogen
• C.Carbon monoxide and hydrogen
• D.Carbon dioxide and nitrogen

When excess of HCl is added to acetylene, the product is?

• A.1,1-dichloroethane
• B.1,2-dichloroethane
• C.Vinyl chloride
• D.Tetrachloroethane