Question

A student took solution of common salt in a test tube and added a few drops of solution X. When the kept a moist blue limus paper over the mouth of the test tube, the litmus paper turns red due to the evolution of a gas Y. X and Y repectively are
A)conc. NaOH, Cl2
B)conc. HNO3,H2
C)conc. H2SO4,HCl
D)conc. HCl,CO2.​

Answer 1

Answer:

the correct answer is c)- conc.H2so4,hcl