Answers

2014-05-18T18:30:36+05:30
Normality of HCl = 1*molarity of HCl
                         = 1N
apply N1V1 = N2V2
1*20 = N2*10
N2 = 2
molarity of Ca(OH)2 = N2/2
                              = 2/2  = 1M
molarity = no.of moles/volume of solution in L
             = weight/(molecular weight*volume of solution in L)
1 = weight/(74*volume of solution in L)
74 = strength (in gram/L)
hence (2) option is correct
1 5 1