Class 12 Chemistry Practice Questions

18 free practice MCQs for Class 12 Chemistry, following the school syllabus — playable as an adaptive quiz in English, Hindi, Tamil, Telugu, Bengali and 8 more Indian languages. No sign-up, no ads.

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Sample questions with answers

Q1. Which functional group is present in alcohols? 🧪

  1. −COOH
  2. −OH
  3. −NH₂
  4. −CHO
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B. −OH

Q2. In electrochemistry, oxidation occurs at the: 🧪

  1. Electrolyte
  2. Cathode
  3. Anode
  4. Both electrodes
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C. Anode

Q3. Which of the following is a halogen? 🧪

  1. Sodium
  2. Magnesium
  3. Bromine
  4. Phosphorus
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C. Bromine

Q4. The IUPAC name of CH₃−CH₂−OH is: 🧪

  1. Methanol
  2. Ethanol
  3. Butanol
  4. Propanol
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B. Ethanol

Q5. Which type of isomerism is shown by compounds with the same molecular formula but different structural arrangements? 🧪

  1. Optical isomerism
  2. Conformational isomerism
  3. Structural isomerism
  4. Geometrical isomerism
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C. Structural isomerism

Q6. Faraday's first law of electrolysis states that the mass deposited is proportional to: 🧪

  1. Voltage applied
  2. Quantity of charge passed
  3. Resistance of electrolyte
  4. Temperature of the solution
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B. Quantity of charge passed

Q7. Which reagent is used to distinguish aldehydes from ketones? 🧪

  1. Benedict's solution
  2. Both Tollens' and Benedict's reagent
  3. Tollens' reagent
  4. Fehling's solution only
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B. Both Tollens' and Benedict's reagent

Q8. What is the oxidation state of oxygen in H₂O? 🧪

  1. +1
  2. 0
  3. +2
  4. −2
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D. −2

Q9. Addition polymerisation produces polymers by joining monomers through: 🧪

  1. Ionic reactions only
  2. Hydrolysis
  3. Loss of small molecules
  4. Double or triple bonds opening
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D. Double or triple bonds opening

Q10. Which of the following is a reducing sugar? 🧪

  1. Sucrose
  2. Glucose
  3. Cellulose
  4. Starch
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B. Glucose

Q11. Which functional group is present in alcohols?

  1. −OH
  2. −COOH
  3. −CHO
  4. −NH₂
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A. −OH

Q12. Which functional group is present in carboxylic acids?

  1. −OH
  2. −COOH
  3. −CHO
  4. −NH₂
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B. −COOH

Q13. What is the chemical formula of methane?

  1. CH₃
  2. C₂H₆
  3. CH₄
  4. CH₂
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C. CH₄

Q14. What is the molecular formula of glucose?

  1. C₂H₆O
  2. C₆H₆
  3. CH₄O
  4. C₆H₁₂O₆
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D. C₆H₁₂O₆

Q15. The gain of electrons by a species is called:

  1. Reduction
  2. Oxidation
  3. Neutralisation
  4. Sublimation
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A. Reduction

Q16. The loss of electrons by a species is called:

  1. Reduction
  2. Oxidation
  3. Condensation
  4. Evaporation
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B. Oxidation

Q17. Which is the simplest alkane?

  1. Ethane
  2. Propane
  3. Methane
  4. Butane
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C. Methane

Q18. What is the chemical formula of water?

  1. H₂O₂
  2. OH
  3. H₃O
  4. H₂O
Show answer

D. H₂O

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