Question

The alkene in the following is:

• A. HC = CH
• B. H\(_2\)C = CH\(_2\)
• C. CH\(_3\) - CH\(_2\) - CH\(_3\)
• D. CH\(_3\) - C = CH

Hint:

Alkenes contain at least one C = C double bond. The simplest alkene is ethene (C\(_2\)H\(_4\)).

Answer 1

The Correct Option is B

Step 1: Understand the structure of alkenes.
Alkenes are hydrocarbons that contain at least one double bond between two carbon atoms (C = C). This double bond is characteristic of alkenes, making them unsaturated.
Step 2: Analyze the options.
- (A) HC = CH: This is an alkene, but it is an incorrect structure because the formula is incomplete.
- (B) H\(_2\)C = CH\(_2\): This is the correct structure of ethene (C\(_2\)H\(_4\)), an alkene with a double bond between two carbon atoms.
- (C) CH\(_3\) - CH\(_2\) - CH\(_3\): This is an alkane, not an alkene, as it only contains single bonds.
- (D) CH\(_3\) - C = CH: This is an alkene, but it does not represent the simplest alkene form.
Step 3: Conclusion.
Thus, the correct answer is (B) H\(_2\)C = CH\(_2\).