Some Chemical Reactions MCQs with Answers

An aldehyde on oxidation gives?

• A.An acid
• B.An alcohol
• C.A ketone
• D.An ester

Forward reaction is the one that

• A.Takes place from left to right as given in chemical equation
• B.Takes place from right to left as given in chemical equation
• C.Takes place in both directions simultaneously
• D.Does not involve any chemical change

What will be the result if you put yeast in dough?

• A.The carbon dioxide will be released
• B.Oxygen will be released
• C.Nitrogen will be released
• D.Hydrogen will be released

The effect of temperature on chemical equilibrium is explained by which principle?

• A.Aufbau Principle
• B.Hund's Rule
• C.Pauli Exclusion Principle
• D.Le Chatelier's Principle

3-Hexanone on oxidation in the presence of KMnO₄/H₂SO₄ gives the major product ?

• A.Acetic acid and butanoic acid
• B.Propanoic acid and propanoic acid
• C.Acetic acid and propanoic acid
• D.Butanoic acid and ethanoic acid

NaNO3, on heating gives _?

• A.Na2O + NO2
• B.Na2O
• C.Na + NO2
• D.NaNO2

A chemical process that gives out heat is called _?

• A.Reduction
• B.Oxidation
• C.Neutralization
• D.Combustion

What is the percentage yield when the actual yield is 2 g and the theoretical yield is 4 g?

• A.25%
• B.50%
• C.75%
• D.100%

Methane reacts with oxygen to give products of water and carbon dioxide. This reaction is characterized as _?

• A.Displacement
• B.Neutralization
• C.Decomposition
• D.Combustion

During Clemmensen reduction of aldehyde and ketone, carbonyl group into alkane group is carried out with ?

• A.H₂/Pd
• B.LiAlH₄
• C.NaBH₄
• D.Zn/Hg conc. HCl