Question

Oleum is chemically known as

• A. $H_2SO_3$
• B. $H_2SO_5$
• C. $H_2S_2O_7$
• D. $H_2S_2O_8$

Answer 1

Answer: (C)

$H_2S_2O_7$

Answer 2

Answer (c) $H_2S_2O_7$