Class 12 Chemistry · Chapter 5 · Test 1
Halogenoalkanes Basics
46 MCQs
46 questions · 40 min · 46 marks
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Sample questions
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Question 1
A halogenoalkane is formed when:
- AOne or more hydrogen atoms of an alkane are replaced by halogen atoms
- BA carbon atom of an alkane is replaced by a halogen atom
- CA halogen adds to an alkane without any loss of hydrogen
- DAn alkane is oxidised by a halogen oxide
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Answer: A
A halogenoalkane is an alkane in which one or more hydrogen atoms are replaced by halogen atoms.
Question 2
Monohalogenoalkanes are also called:
- AHaloforms
- BAlkyl halides
- CAryl halides
- DHalohydrins
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Answer: B
Monohalogenoalkanes (one halogen atom) are also called alkyl halides.
Question 3
What is the general formula of monohalogenoalkanes (alkyl halides)?
- AR-OH
- BR-NH2
- CR-X
- DR-CHO
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Answer: C
R is an alkyl group and X is a halogen atom (F Cl Br or I).
Question 4
A trihalogenoalkane contains:
- AOne halogen atom
- BTwo halogen atoms
- CFour halogen atoms
- DThree halogen atoms
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Answer: D
Mono di and tri refer to one two and three halogen atoms in the molecule.
Question 5
Which of the following compound is a primary halogenoalkane?
- A1-bromo-2,2-dimethylpropane
- B2-bromo-3-methylbutane
- C2-bromopropane
- D2-bromo-2-methylpropane
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Answer: A
In 1-bromo-2,2-dimethylpropane the carbon bearing Br is attached to only one other carbon so it is primary.
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