Match List-I with List-II
List-I List-II Number of carbon atoms Number of structural isomers (A). $C_4H_{10}$ (I). 2 (B). $C_5H_{12}$ (II). 3 (C). $C_6H_{14}$ (III). 5 (D). $C_7H_{16}$ (IV). 9
Choose the correct answer from the options given below:
To solve this matching question, we need to understand the structural isomers of alkanes for each given molecular formula. Structural isomerism occurs when molecules have the same molecular formula but different structural arrangements.
Let's analyze each given alkane:
- For \(C_4H_{10}\):
- This molecular formula corresponds to butane and its isomers.
- Butane has 2 structural isomers: normal butane (n-butane) and isobutane (methylpropane).
- Hence, the number of structural isomers for \(C_4H_{10}\) is 2.
- For \(C_5H_{12}\):
- This molecular formula corresponds to pentane and its isomers.
- Pentane has 3 structural isomers: normal pentane, isopentane (methylbutane), and neopentane (dimethylpropane).
- Hence, the number of structural isomers for \(C_5H_{12}\) is 3.
- For \(C_6H_{14}\):
- This molecular formula corresponds to hexane and its isomers.
- Hexane has 5 structural isomers: normal hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane.
- Hence, the number of structural isomers for \(C_6H_{14}\) is 5.
- For \(C_7H_{16}\):
- This molecular formula corresponds to heptane and its isomers.
- Heptane has 9 structural isomers, including normal heptane, 2-methylhexane, 3-methylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane, 3-ethylpentane, and 2,2,3-trimethylbutane.
- Hence, the number of structural isomers for \(C_7H_{16}\) is 9.
Now, we can match the numbers of carbon atoms and structural isomers:
| List-I | List-II |
| (A). \(C_4H_{10}\) | (I). 2 |
| (B). \(C_5H_{12}\) | (II). 3 |
| (C). \(C_6H_{14}\) | (III). 5 |
| (D). \(C_7H_{16}\) | (IV). 9 |
Thus, the correct matching is: (A) - (I), (B) - (II), (C) - (III), (D) - (IV).
Hence, the correct answer is:
(A) - (I), (B) - (II), (C) - (III), (D) - (IV)
Important Questions from Chemistry (CUET PG) Mixed
- Which of the following atmospheric gas does not dissolve in water at standard temperature and pressure conditions?
- Which of the following physical processes is responsible for the blue color of the sky?
- Arrange the following coal types in the increasing order of their heat content (KJ/kg)
(A). Peat
(B). Lignite
(C). Anthracite
(D). Bituminous
(E) Sub-bituminous
Choose the correct answer from the options given below: - In which of the following layers of atmosphere, does the temperature decrease with the increase in height from the earth's surafce?
(A). Troposphere
(B). Mesosphere
(C). Thermosphere
(D). Stratosphere
Choose the correct answer from the options given below: Choose the correct statement from the following:
(A). Water has highest density at 4°C
(B). Freezing point of water is 0°C
(C) An Ice cube does not completely dip in water, rather floats on water in a glass.
(D). Addition of common salt reduces freezing point of water.
Choose the correct answer from the options given below:
