A vessel contains equal volumes of SO_2 and CH_4Through a small hole, the gases effused into vacuum. After 200sec, the total volume is reduced to half. What is the ratio of SO_2and CH_4remaining in the vessel?

A vessel contains equal volumes of SO_2 and CH_4Through a small hole,

1.	A vessel contains equal volumes of SO_2 and CH_4Through a small hole, the gases effused into vacuum. After 200sec, the total volume is reduced to half. What is the ratio of SO_2and CH_4remaining in the vessel?
Answer» `1 :2` `2 :1` `1 :1` `1 :4` ANSWER :B