Question

STATE WHICH OF THE FOLLOWING METHODS IS GENERALLY USED FOR PREPARATION OF THE SALTS 1-5 GIVEN BELOW:
A. Neutralisation (insoluble base and dilute acid)
B. Neutralisation (Alkali and dilute acid)
C. Simple displacement (active metal and dilute acid)
D. Direct combination
E. Precipitation (double decomposition)

1. PbCO_​​​3
2. Zn(NO_{​​​​​3})₂
3. NaCl
4. Cu(NO_{​​​​​3})₂
5. FeS

Answer 1

A Cu(OH)2 +2HNO3===>Cu(NO3)2+2H2O
B NaOH+HCl===>NaCl +H2O
C Zn+2HNO3===>Zn(NO3)2+H2
D Fe+S===>FeS
E Pb(NO3)2+K2CO3===>PbCO3+2KNO3

so A is 4
B is 3
C is 2
D is 5 and E is 1