NEETChemistrySolutions
Two elements A and B form compounds having formula AB 2 and AB 4 . When dissolved in 20 g of benzene (C 6 H 6 ), 1 g of AB 2 lowers the freezing point by 2.3 K whereas 1.0 g of AB 4 lowers it by 1.3 K. The molar depression constant for benzene is 5.1 K kg mol –1 . Calculate atomic masses of A and B.
Options
- AA = 34.25 u and B = 42.64 u
- BA = 25.58 u and B = 42.64 u
- CA = 25.58 u and B = 78.36 u
- DA = 34.25 u and B = 78.36 u
Correct answer
B. A = 25.58 u and B = 42.64 u
Step-by-step solution
Correct Option is : (B) A = 25.58 u and B = 42.64 u