Some Chemical Reactions MCQs with Answers

Alkyl halide can be dehalogenated to alkene in the presence of ?

• A.KOH (alc)
• B.NaOH (aq)
• C.Zn/HCl
• D.H₂SO₄ (conc.)

The unit of rate constant for zero order reaction is _?

• A.mole dm⁻³ s⁻¹
• B.s⁻¹
• C.dm³ mole⁻¹ s⁻¹
• D.mol² dm⁻⁶ s⁻¹

Fehling's test and Tollen's test are used for the identification of ?

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

Which of the following does not form alcohol with Grignard reagent?

• A.CO₂
• B.Formaldehyde (HCHO)
• C.Acetaldehyde (CH₃CHO)
• D.Acetone (CH₃COCH₃)

Which of the following halides will react most rapidly in a SN2 reaction?

• A.CH3F
• B.CH3Br
• C.CH3Cl
• D.CH3I

One of the country where alcohol has been very successfully used as motor fuel is:

• A.Australia
• B.Japan
• C.Brazil
• D.Canada

Past Paper MCQ

Ethanol fuel is also known as:

• A.Carbon neutral fuel
• B.Fossil fuel
• C.Nuclear fuel
• D.Synthetic fuel

Past Paper MCQ

What is the effect of burning coal without sufficient air supply?

• A.Production of carbon dioxide
• B.Production of carbon monoxide
• C.Production of sulfur dioxide
• D.Production of nitrogen oxide

Balance the following chemical equation: KNO₃ → KNO₂ + O₂?

• A.4KNO₃ → 4KNO₂ + O₂
• B.KNO₃ → KNO₂ + O₂
• C.2KNO₃ → KNO₂ + 2O₂
• D.2KNO₃ → 2KNO₂ + O₂

Ninhydrin reacts with amino acid to form a product of which colour?

• A.Bluish violet
• B.Reddish orange
• C.Greenish yellow
• D.Pinkish brown