Undergraduate MCQ & Objective Questions
The undergraduate level is a crucial phase in a student's academic journey, especially for those preparing for school and competitive exams. Mastering this stage can significantly enhance your understanding and retention of key concepts. Practicing MCQs and objective questions is essential, as it not only helps in reinforcing knowledge but also boosts your confidence in tackling important questions during exams.
What You Will Practise Here
Fundamental concepts in Mathematics and Science
Key definitions and theories across various subjects
Important formulas and their applications
Diagrams and graphical representations
Critical thinking and problem-solving techniques
Subject-specific MCQs designed for competitive exams
Revision of essential topics for better retention
Exam Relevance
Undergraduate topics are integral to various examinations such as CBSE, State Boards, NEET, and JEE. These subjects often feature a mix of conceptual and application-based questions. Common patterns include multiple-choice questions that assess both theoretical knowledge and practical application, making it vital for students to be well-versed in undergraduate concepts.
Common Mistakes Students Make
Overlooking the importance of understanding concepts rather than rote memorization
Misinterpreting questions due to lack of careful reading
Neglecting to practice numerical problems that require application of formulas
Failing to review mistakes made in previous practice tests
FAQs
Question: What are some effective strategies for solving undergraduate MCQ questions?Answer: Focus on understanding the concepts, practice regularly, and review your answers to learn from mistakes.
Question: How can I improve my speed in answering objective questions?Answer: Time yourself while practicing and gradually increase the number of questions you attempt in a set time.
Start your journey towards mastering undergraduate subjects today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Your success is just a question away!
Q. What is the main product of the complete combustion of ethane (C2H6)? (2023)
A.
Carbon dioxide and water
B.
Carbon monoxide and water
C.
Soot and water
D.
Hydrogen gas
Show solution
Solution
The complete combustion of ethane produces carbon dioxide and water as the main products.
Correct Answer:
A
— Carbon dioxide and water
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Q. What is the main product of the complete combustion of methane? (2023)
A.
Carbon dioxide and water
B.
Carbon monoxide and water
C.
Carbon and hydrogen
D.
Oxygen and water
Show solution
Solution
The complete combustion of methane (CH4) produces carbon dioxide (CO2) and water (H2O).
Correct Answer:
A
— Carbon dioxide and water
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Q. What is the main product of the fusion of hydrogen nuclei? (2022)
A.
Helium
B.
Carbon
C.
Oxygen
D.
Nitrogen
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Solution
The fusion of hydrogen nuclei primarily produces helium, along with a release of energy.
Correct Answer:
A
— Helium
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Q. What is the main product of the oxidation of ethanol?
A.
Acetic acid
B.
Formic acid
C.
Butanoic acid
D.
Propanoic acid
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Solution
The main product of the oxidation of ethanol is acetic acid.
Correct Answer:
A
— Acetic acid
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Q. What is the main product of the reaction between aluminum and hydrochloric acid? (2023)
A.
AlCl3
B.
H2
C.
Al(OH)3
D.
Al2Cl6
Show solution
Solution
The main product of the reaction between aluminum and hydrochloric acid is hydrogen gas (H2).
Correct Answer:
B
— H2
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Q. What is the main product of the reaction between an acid and a base? (2019)
A.
Salt
B.
Water
C.
Hydrogen gas
D.
Carbon dioxide
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Solution
The main products of the neutralization reaction between an acid and a base are salt and water.
Correct Answer:
A
— Salt
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Q. What is the main product of the reaction of 1-bromo-2-methylpropane with KOH in ethanol? (2020)
A.
2-methylpropene
B.
2-methylpropan-1-ol
C.
1-bromo-2-methylpropane
D.
2-bromo-2-methylpropane
Show solution
Solution
The reaction of 1-bromo-2-methylpropane with KOH in ethanol leads to the formation of 2-methylpropene through an elimination reaction.
Correct Answer:
A
— 2-methylpropene
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Q. What is the main product of the thermal decomposition of ammonium dichromate? (2023)
A.
Cr2O3
B.
CrO3
C.
Cr
D.
NH3
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Solution
The thermal decomposition of ammonium dichromate produces chromium(III) oxide (Cr2O3) as the main product.
Correct Answer:
A
— Cr2O3
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Q. What is the main product when 1-bromobutane reacts with sodium hydroxide in ethanol? (2021)
A.
Butanol
B.
Butene
C.
Sodium bromide
D.
Butyric acid
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Solution
The reaction of 1-bromobutane with sodium hydroxide in ethanol leads to elimination, forming butene as the main product.
Correct Answer:
B
— Butene
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Q. What is the main product when 1-bromopropane is treated with alcoholic KOH? (2021)
A.
Propene
B.
1-propanol
C.
2-propanol
D.
Bromopropane
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Solution
Alcoholic KOH promotes elimination reactions, leading to the formation of propene from 1-bromopropane.
Correct Answer:
A
— Propene
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Q. What is the main product when 1-bromopropane is treated with magnesium in dry ether? (2019)
A.
Propane
B.
Grignard reagent
C.
Bromopropane
D.
Propyl alcohol
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Solution
The reaction of 1-bromopropane with magnesium in dry ether forms the Grignard reagent, propylmagnesium bromide.
Correct Answer:
B
— Grignard reagent
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Q. What is the main product when 1-chloropropane is treated with alcoholic KOH? (2019)
A.
Propene
B.
Propan-1-ol
C.
Propan-2-ol
D.
Chloropropane
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Solution
Alcoholic KOH promotes elimination reactions, leading to the formation of propene from 1-chloropropane.
Correct Answer:
A
— Propene
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Q. What is the main product when 1-chloropropane is treated with aqueous KOH? (2019)
A.
Propene
B.
Propan-1-ol
C.
Propan-2-ol
D.
Chloropropane
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Solution
The treatment of 1-chloropropane with aqueous KOH leads to the formation of propan-1-ol through nucleophilic substitution.
Correct Answer:
B
— Propan-1-ol
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Q. What is the main product when 1-chloropropane is treated with excess alcoholic KOH? (2020)
A.
Propene
B.
1-Propanol
C.
2-Propanol
D.
Chloropropane
Show solution
Solution
Excess alcoholic KOH promotes elimination reactions, leading to the formation of propene from 1-chloropropane.
Correct Answer:
A
— Propene
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Q. What is the main product when aluminum reacts with hydrochloric acid? (2023)
A.
AlCl3
B.
H2
C.
Al(OH)3
D.
Al2Cl6
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Solution
When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).
Correct Answer:
B
— H2
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Q. What is the main product when an aldehyde is treated with sodium bisulfite? (2019)
A.
Aldol
B.
Bisulfite adduct
C.
Hydrocarbon
D.
Alcohol
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Solution
The main product formed when an aldehyde reacts with sodium bisulfite is a bisulfite adduct.
Correct Answer:
B
— Bisulfite adduct
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Q. What is the main product when an amine reacts with a carbonyl compound? (2019)
A.
Amide
B.
Alcohol
C.
Aldehyde
D.
Ketone
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Solution
The main product of the reaction between an amine and a carbonyl compound is an amide.
Correct Answer:
A
— Amide
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Q. What is the main product when an amine reacts with a haloalkane? (2019)
A.
Amide
B.
Quaternary ammonium salt
C.
Alcohol
D.
Ester
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Solution
The main product of the reaction between an amine and a haloalkane is a quaternary ammonium salt.
Correct Answer:
B
— Quaternary ammonium salt
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Q. What is the main product when an amine reacts with an acyl chloride?
A.
Amide
B.
Ester
C.
Alcohol
D.
Aldehyde
Show solution
Solution
The reaction of an amine with an acyl chloride produces an amide.
Correct Answer:
A
— Amide
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Q. What is the main product when an amine reacts with an alkyl halide?
A.
Amide
B.
Quaternary ammonium salt
C.
Alcohol
D.
Ester
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Solution
The main product is a quaternary ammonium salt when an amine reacts with an alkyl halide, as the amine can be further alkylated.
Correct Answer:
B
— Quaternary ammonium salt
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Q. What is the main product when ethene reacts with bromine?
A.
Bromethane
B.
1,2-Dibromoethane
C.
Ethane
D.
Bromoethane
Show solution
Solution
The reaction of ethene with bromine results in the formation of 1,2-dibromoethane.
Correct Answer:
B
— 1,2-Dibromoethane
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Q. What is the main product when ethene reacts with hydrogen in the presence of a catalyst?
A.
Ethane
B.
Ethanol
C.
Ethyl chloride
D.
Acetylene
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Solution
The main product is ethane, formed by the hydrogenation of ethene.
Correct Answer:
A
— Ethane
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Q. What is the main product when ethene reacts with water in the presence of an acid? (2023)
A.
Ethanol
B.
Ethane
C.
Acetic acid
D.
Ethylene glycol
Show solution
Solution
The reaction of ethene with water in the presence of an acid yields ethanol.
Correct Answer:
A
— Ethanol
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Q. What is the main product when hydrogen reacts with oxygen? (2019)
A.
Water
B.
Hydrogen peroxide
C.
Ozone
D.
Hydroxide
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Solution
When hydrogen reacts with oxygen, the main product formed is water (H2O).
Correct Answer:
A
— Water
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Q. What is the main product when phenol is treated with bromine?
A.
Bromobenzene
B.
Bromophenol
C.
Benzene
D.
Bromobutane
Show solution
Solution
Bromine reacts with phenol to form bromophenol, which is a substitution product.
Correct Answer:
B
— Bromophenol
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Q. What is the main product when phenol reacts with bromine? (2019)
A.
Bromobenzene
B.
Bromophenol
C.
Benzene
D.
No reaction
Show solution
Solution
Phenol reacts with bromine to form Bromophenol, which is a brominated derivative of phenol.
Correct Answer:
B
— Bromophenol
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Q. What is the main product when phenol reacts with sodium hydroxide?
A.
Sodium phenoxide
B.
Sodium benzoate
C.
Benzene
D.
Phenyl acetate
Show solution
Solution
Phenol reacts with sodium hydroxide to form sodium phenoxide, which is a salt of phenol.
Correct Answer:
A
— Sodium phenoxide
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Q. What is the main product when propan-2-one is treated with iodine in the presence of a base?
A.
Iodoform
B.
Acetone
C.
Bromoform
D.
Chloroform
Show solution
Solution
Propan-2-one (acetone) reacts with iodine in the presence of a base to form Iodoform.
Correct Answer:
A
— Iodoform
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Q. What is the main product when propan-2-one is treated with sodium borohydride? (2023)
A.
Propan-1-ol
B.
Propan-2-ol
C.
Propan-3-ol
D.
No reaction
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Solution
Sodium borohydride reduces propan-2-one to propan-2-ol, which is a secondary alcohol.
Correct Answer:
B
— Propan-2-ol
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Q. What is the main product when propanal is treated with sodium bisulfite? (2019)
A.
Sodium propanoate
B.
Propyl sulfonate
C.
Propane-1,2-diol
D.
A bisulfite adduct
Show solution
Solution
Propanal reacts with sodium bisulfite to form a bisulfite adduct, which is a characteristic reaction of aldehydes.
Correct Answer:
D
— A bisulfite adduct
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