Question

(1) Complete the chart:
C2H2-__-__-C5H8-__-___​

Answer 1

$C_2H_2, C_3H_4, C_4H_6, C_5H_8, C_6H_{10}, C_7H_{12}$.

• The general formula of the alkyne is $C_nH_{2n-2}$.
• The first compound is ethylene having a formula $C_2H_2$.
• The next compound should contain 3 carbon atoms so, its formula will be $C_3H_4$.
• The next compound should contain 4 carbon atoms so, its formula will be $C_4H_6$.
• The next compound should contain 5 carbon atoms so, its formula will be $C_5H_8$.
• The next compound should contain 6 carbon atoms so, its formula will be $C_6H_{10}$.
• The next compound should contain 7 carbon atoms so, its formula will be $C_7H_{12}$.