Amixture of two gases was allowed to effuse from a container. one of the gases escaped from the container 1.43 times as fast as the other one. the two gases could have been: a) co and sf6
b) o2 and cl2
c) co and co2 d) cl2 and sf6
e) o2 and sf6

The two gases are and  

Explanation:

According to Graham law of effusion for a binary mixture of gases-

Where and are rate of effusion of gas-1 and gas-2 respectively. and are molar mass of gas-1 and gas-2 respectively.

                             Gas                               Molar mass (g/mol)

                                                                 32

                                                                 71

                                   CO                                         28

                                                                44

                                                                 146

So, clearly molar mass of is greater than molar mass of . Hence will effuse faster.

Also,

Hence, option (d) is correct.

they both have a y in them

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be