Question

$20\, cc$ of $CO_2$ are passed over red hot coke. The volume of CO evolved is

• A. $10 \,cc$
• B. $20 \,cc$
• C. $30 \,cc$
• D. $40 \,cc$

Answer 1

Answer: (D)

$40 \,cc$

Answer 2

$CO_2 + C ? 2CO$ $1 \,cc$ of $CO_2$ gives $? 2\, cc$ of $CO$ $20\,cc$ of $CO_2$ gives $? 40\, cc$ of $CO$