Question

a) Write the general formula of alkanes from the table__________________.

b) How many $\sigma$ bonds are there in $C_2{H}_6$____________________.

c) What sequential order did you notice in the molecular formulae?______________.

d) There exists double bonds between carbon atoms of alkenes, do you agree with this statement? Give reasons.

Answer 1

$\left(a\right)C_n{H}_{2_{n+2}}$

$\left(b\right)2+6=8$

$\left(c\right)$ each homologue increases by $-C{H}_2-$ i.e. ${14}_4$ by mass.

$\left(d\right)$ yes,their general formula is $C_n{H}_{2n}$ which means they req. less hydrogen than alkanes so, $4\pi$-bond must be there they give Bromine water test as proof also.