Question

An alkyne has seventy five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be:
(a) 150
(b) 148
(c) 152
(d) 146

Answer 1

148
The number of hydrogen atoms in an alkyne that has 75 carbon atoms in its molecule is 148. The general formula of the alkynes is C_nH_2n-2, where 'n' is the number of carbon atoms in each molecule. Substituting n = 75 in the formula of alkynes, we get the number of hydrogen atoms to be 148.