To check the principle of multiple proportions, a series of pure binary compounds  $\left(A_x{B}_y\right)$ were analyzed, and their composition is tabulated below. The correct option(s) is(are)

Compound	Weight % of A	Weight % of B
1	50	50
2	44.4	55.6
3	40	60

 

If empirical formula of compound 3 is $A_3{B}_4$ , then the empirical formula of compound 2 is  $A_3{B}_5$.

If empirical formula of compound 3 is  $A_3{B}_2$ and atomic weight of element A is 40, then the atomic wight of B is 90.

If empirical formula of compound 2 is $AB$ , then the empirical formula of the compound 1 is  $A_5{B}_4$.

If atomic weight of A and B are 80 and 40, respectively, then the empirical formula of compound 1 is  $A{B}_2$.