The P Block Elements - Result Question 37
####38. Identify the correct formula of ‘oleum’ from the following.
[NEET Odisha 2019]
(a) $H_2 S_2 O_8$
(c) $H_2 S_2 O_7$
(c) $H_2 SO_3$
(d) $H_2 SO_4$
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Solution:
- (b) Oleum is $H_2 S_2 O_7$.