What is the double replacement reaction of Na2C2O4+Pb(NO3)2

Na2C2O4 + Pb(NO3)2 = PbC2O4 + NaNO3 - Chemical Equation Balancer.

Explanation:

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

1. they vary with a higher number because boiling is way hotter than melting