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1 Physics MCQs

Which of the following circuit elements is used to block DC (direct current) in an electronic circuit?

  • Resistance
  • Capacitance
  • Inductance
  • Diode
0 Comments
Correct Answer: B. Capacitance

Explanation:

In an electronic circuit, a capacitor (capacitance) is commonly used to block direct ... Read More Details

2 Everyday Science MCQs

Which is the most distant human-made object ever sent into space?

  • Voyager 1
  • Pioneer 10
  • Eris
  • New Horizons
0 Comments
Correct Answer: A. Voyager 1

Explanation:

The most distant human-made object ever sent into space is Voyager 1. Launched ... Read More Details

3 Physics MCQs

A boy throws a ball straight up while sitting in a car moving at constant speed. Where does it land?

  • Behind him
  • In front of him
  • Into his hand
  • By his side
0 Comments
Correct Answer: C. Into his hand

Explanation:

When a boy throws a ball straight up while sitting in a car ... Read More Details

4 Chemistry MCQs

What is the name of the process used to make soap?

  • Saponification
  • Hydrolysis
  • Condensation
  • Polymerisation
0 Comments
Correct Answer: A. Saponification

Explanation:

Soap is made through a chemical process called saponification, which is a type ... Read More Details

5 Organic Chemistry MCQs

The rate of an E1 elimination reaction depends on which factor?

  • The concentration of the substrate
  • The concentration of the nucleophile
  • The concentration of both substrate and nucleophile
  • The concentration of base and nucleophile
0 Comments
Correct Answer: A. The concentration of the substrate

Explanation:

The E1 reaction (elimination unimolecular) is a type of elimination reaction in organic ... Read More Details

6 Organic Chemistry MCQs

Elimination bimolecular (E2) reactions involve which type of kinetics?

  • First-order kinetics
  • Second-order kinetics
  • Third-order kinetics
  • Zero-order kinetics
0 Comments
Correct Answer: B. Second-order kinetics

Explanation:

The E2 reaction (elimination bimolecular) is one of the fundamental types of elimination ... Read More Details

7 Organic Chemistry MCQs

Why is the Grignard reagent highly reactive?

  • Because of the presence of a halogen atom
  • Because of the presence of a magnesium atom
  • Because of the polarity of the C–Mg bond
  • All of the above
0 Comments
Correct Answer: C. Because of the polarity of the C–Mg bond

Explanation:

Grignard reagents, with the general formula R–MgX (where R is an alkyl or ... Read More Details

8 Organic Chemistry MCQs

The ether used in Wurtz synthesis is ?

  • Diethyl ether
  • Dimethyl ether
  • Ethyl methyl ether
  • Phenyl ether
0 Comments
Correct Answer: A. Diethyl ether

Explanation:

The Wurtz synthesis is a well-known organic reaction used for the preparation of ... Read More Details

9 Organic Chemistry MCQs

Which one of the following species is not an electrophile?

  • NH₃
  • Br⁺
  • H⁺
  • BF₃
0 Comments
Correct Answer: A. NH₃

Explanation:

In organic chemistry, species are classified as electrophiles or nucleophiles based on how ... Read More Details

10 Organic Chemistry MCQs

Ethyl magnesium bromide + acetone (then hydrolysis) gives which alcohol?

  • Primary alcohol
  • Secondary alcohol
  • Tertiary alcohol
  • Dihydric alcohol
0 Comments
Correct Answer: C. Tertiary alcohol

Explanation:

Grignard reagents are versatile organometallic compounds used widely in organic synthesis to form ... Read More Details