Q11Written answer
Structural formula of ethyne is
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Worked solution
The answer is a)
Explanation:
Chemical formula of Ethyne is C2H2, Hence answer is a)
NCERT Exemplar · Class 10 · Science
Chapter 4: Carbon and Its Compounds
Practice each question, then open the answer or worked solution.
Multiple Choice Questions
17 questionsQ12Multiple choice
Identify the unsaturated compounds from the following
(a) (i) and (ii)
(b) (ii) and (iv)
(c) (iii) and (iv)
(d) (ii) and (iii)
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Worked solution
The answer is (d) (ii) and (iii)
Explanation:
Propene has double bond and Propyne is having a triple bond. Hence they are unsaturated compounds.
Q13Multiple choice
Chlorine reacts with saturated hydrocarbons at room temperature in the
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Correct option: B
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Worked solution
The answer is (b) presence of sunlight
Explanation:
In the presence of sunlight, Chlorine reacts with Hydrocarbons and displaces Hydrogen atoms.
Q14Multiple choice
In the soap micelles
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Correct option: A
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Worked solution
The answer is (a) the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster.
Explanation:
A micelle is a spherical aggregate soap molecules in soap solution. In the soap micelles, the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster.
Q15Multiple choice
Pentane has the molecular formula C5 H12. It has
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Correct option: C
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Worked solution
The answer is (c) 16 covalent bonds
Q16Written answer
Structural formula of benzene is
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Worked solution
The answer is c)
Explanation:
Chemical formula of Benzene is C6H6. In option call the arms of carbon atoms are occupied hence it is the right answer.
Q17Multiple choice
Ethanol reacts with sodium and forms two products. These are
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Correct option: C
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Worked solution
The answer is (c) sodium ethoxide and hydrogen