Question

The number if atoms collinear in $H_{3}C-C\equiv C-C\equiv C-{CH}_3$ is:

• A. four
• B. six
• C. ten
• D. eight

Answer 1

Answer: (B)

six

${CH}_3-C\equiv C-C\equiv C-{CH}_3$

The number of atoms collinear

For sp hybridised carbons, the geometry is linear

$H_{3}C-C\equiv C-C\equiv C-{CH}_3$

Linear sp hybridised sp hybridised linear

Therefore all the six atoms are linear.