1.D
2.A
3.C
4.B
5.C
6.B
7.B
8.D
9.C
10.B
11.D
12.A
13.A
14.D
15.B

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1. How many isomers are there of a compound with the formula C₄H₁₀O?
   Ans: 8

2. How many structural isomers are there of a compound with the formula C₄H₁₀O?
   Ans: 7

3. How many isomers are there of an alcohol with formula C₄H₁₀O?
   Ans: 5

4. How many structural isomers are there of an alcohol with formula C₄H₁₀O?
   Ans: 4

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