Question

СаС2-С2Н2-С2Н4-С2Н5Br-C4H10

Answer 1

CaC2+2H2O=Ca(OH)2+C2H2

C2H2+H2=(Ni)=C2H4

C2H4+HBr=C2H5Br

2C2H5Br +2Na=C4H10 + 2NaBr

Answer 2

CaC2+2H2O=CH---CH+Ca(OH)2
CH---CH+H2=CH2--CH2
CH2--CH2+Br2=CH3-CH2-Br+HBr
CH3-CH2-Br+CH3-CH2-Br+Na=2CH3-CH2-CH2-CH2+2NaBr