Question

The alkane from below having two secondary hydrogens is:

• A. 2,2,4,4-Tetramethylhexane
• B. 2,2,3-Tetramethylpentane
• C. 4-Ethyl-3,4-dimethyloctane
• D. 2,2,4,5-Tetramethylheptane

Hint:

When identifying secondary hydrogens, look for the carbon atoms attached to two other carbon atoms. These positions will have the secondary hydrogens.

Answer 1

The Correct Option is B

Step 1: A secondary hydrogen is one that is attached to a carbon atom that is itself attached to two other carbon atoms. 

Step 2: In 2,2,3-Tetramethylpentane, the carbon atoms at positions 2 and 3 have two other carbon atoms attached, and the hydrogens attached to these carbons are secondary hydrogens. 

Step 3: Other options do not exhibit the same secondary hydrogen placement. 

Thus, the correct answer is 2,2,3-Tetramethylpentane.