Question

Which formula represents an alkane?
1.
C2H2
2.
C2H4
3.
C3H4
4.
С3Н8

Answer 1

Answer: Option 4) is correct.

Explanation: It is correct because alkanes have a general formula CnH2n+2. So, all we need to do is substitute and find out how many hydrogens are needed to make the formula an alkane. I am not really good at explaining. I am sorry If I confused you.

Answer 2

Alkanes are the organic compound which has general formula $C_{n}H_{2n +2}$ which satisfies the formula $C_{3}H_{8}$. Hence $C_{3}H_{8}$ represents an alkane.

Alkane

Alkanes are simplest saturated hydrocarbon. Alkanes are also known as paraffins wax. Alkanes which contains only carbon and hydrogen atoms.

General Formula of Alkane

The general formula of alkane is $C_{n} H_{2n + 2}$ where n = 1, 2, 3, 4.......  

• Consider Option 1, $C_{2}H_{2}$ here n = 2 now put the value of n in above formula, we get: $C_{2} H_{2 \times 2 + 2}$ = $C_{2} H_{4 + 2}$ = $C_{2} H_{6}$ , so option 1 does not satisfies the above formula. Hence it is incorrect.
• Consider Option 2, $C_{2} H_{4}$ here n = 2 now put the value of n in above formula, we get: $C_{2} H_{2 \times 2 + 2} = C_{2} H_{4 + 2} = C_{2} H_{6}$, so option 2 does not satisfies the above formula. Hence it is incorrect.
• Consider Option 3, $C_{3} H_{4}$ here n = 3 now put the value of n in above formula, we get: $C_{3} H_{2 \times 3 + 2} = C_{3} H_{6 + 2} = C_{3} H_{8}$, so option 3 does not satisfies the above formula. Hence it is incorrect.
• Consider Option 4, $C_{3} H_{8}$ here n = 3 now put the value of n in above formula, we get: $C_{3} H_{2 \times 3 + 2} = C_{3} H_{6 + 2} = C_{3} H_{8}$, so option 4 satisfies the above formula. Hence it is correct.

Thus, from the above conclusion we can see that option 4 $C_{3}H_{8}$ represents an alkane.

Learn more about the alkane here: https://brainly.com/question/16837399

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