Which of these gases can be dried with concentrated H2SO4?
-
A.
HBr -
B.
H2S -
C.
NH3 -
D.
SO2
Correct Answer: Option D
Explanation
In the preparation of (SO_{2}), we have the resultant reaction from heating the mixture of (Na_{2}SO_{3}) and (HCl) as:
(Na_{2}SO_{{3}{(aq)}} + 2HCl_{(aq)} to 2NaCl_{(aq)} + H_{2}O_{(l)} + SO_{{2}{(g)}})
Passing the gas evolved through conc. (H_{2}SO_{4}), we collect (SO_{2}) by DOWNWARD DELIVERY, leaving (NaCl) in the flask.