`HCl` cannot form `H_(2)Cl_(2)`, while `HF` can form `H_(2)F_(2)`. The reason is

H_(2)S can form

HF can form the salt KHF_2 while HCl does not form KHCl_2 . Explain.

The reaction H_(2) + Cl_(2) to 2HCl is a

F_(2) reacts with H_(2)S and forms

(A) With HCl ,Fe forms FeCl_(2)andH_(2) (R ) Formed H_(2) prevents the formation of FeCl_(3)

Assertion: The photochemical reaction H_(2) + Cl_(2) rarr 2HCl and H_(2) + Br_(2) rarr 2HBr have equal quantum efficiencies. Reason: Both the reaction proceed by different mechanism.

a) write dimensions of first order reaction. b) Give reason for no change in concentration of H_(2) and Cl_(2) with respect to time in the reactions. H_(2)(g) + Cl_(2) overset(hv)to 2HCl(g)