Câu 1:
a, $CaC_2+2H_2O\to Ca(OH)_2+C_2H_2$
b, $nCH_2=CH_2\xrightarrow{{t^o, p, xt}} (\kern-6pt-CH_2-CH_2-\kern-6pt)_n$
c, $C_2H_5OH+3O_2\xrightarrow{{t^o}} 2CO_2+3H_2O$
d, $2C_2H_5OH+2Na\to 2C_2H_5ONa+H_2$
Câu 2:
a,
Đặt CTTQ ancol là $C_nH_{2n+2}O$
Muối tạo thành là $C_nH_{2n+1}ONa$
Bảo toàn $C$, ta có:
$\dfrac{30}{14n+18}=\dfrac{41}{14n+1+16+23}$
$\to 41(14n+18)=30(14n+40)$
$\to n=3$
Vậy ancol có CTPT $C_3H_8O$
b,
CTCT:
$CH_3-CH_2-CH_2OH$: ancol propylic
$CH_3-CHOH-CH_3$: ancol isopropylic