Question

1)ch3-ch2-ch=ch2 + hcl ------> a+.....
a+ KOH------->B +......
2)) ch3-ch2-ch2-ch2Br + KOH------>  A+.....
A+ Hbr-----------> B

Answer 1

1) сh3-ch2-ch=ch2+hcl=ch3-ch2-chcl-ch3
 ch3-ch2-chcl-ch3+KOH=KCl+H2O+ch3-ch=ch-ch3
2) ch3-ch2-ch2-ch2Br+KOH=KBr+H2O+ch3-ch2-ch=ch2
ch3-ch2-ch=ch2+HBr=ch3-ch2-chBr-ch3