2nacl + h2so4 --> 2hcl + na2so4
how many grams of hcl can be prepared from 2.00 mol h2so4 and 2.56 mol nacl?

a. 7.30 g
b. 93.3 g
c. 146 g
d. 150 g
e. 196 g

hence NaCl is the limiting reagant.

One mole of NaCl yields one mole of HCl, hence we'll make at most 

That would be answer B (the difference probably comes from the molar mass of Cl that I chose, 35.5, whereas some prefer to take 35.4)

Yes it would be a physical change.