Question

Which one of these has the smallest # of hydrogen atoms?
a) Butyne
b) Butane
c) Butyne
d) Cyclobutane

Is the answer c)?

Answer 1

How is (a) different from (c) ?

Googling the compound names will get you the formulas

Answer 2

**Sorry, c) was supposed to be butene.

Answer 3

So it should be a) correct?

Answer 4

Butyne has 6 H's
Butane has 10 H's
Butene has 8 H's
Cyclobutane has 8 H's

Yes, a is correct

Answer 5

a) Butyne (CH3CH2CCH) 6H
b) Butane (CH3CH2CH2CH3) 10H
c) Butene (CH3CH2CHCH2) 8H
d) Cyclobutane (CH2CH2CH2CH2) 8H

so agreed a)

Note that there is a learning point here in that there is an equivalance between a ring (in cyclobutane) and a double bond. So we can talk in terms of 'double bond equivalents'.

Answer 6

Thank you!