Mixture of two bivalent metals A and B having mass 2g when dissolved in HCl at STP, 2.24 . `H_(2)` is evolved. What is the mass of A persent in mixture (Atomic mass of `A=15u,B=30u`)-

Options

A. 1g
B. 1.5g
C. 0.5g
D. 0.75g

Answer

A

Explanation

`{:(,A,+,2HCl,to,ACl_(2),+,H_(2)),("Mole:",(x)/(15),,,,,,(x)/(15)),("Mole:",(2-x)/(30),,,,,,(2-x)/(30)):}`
Total mass of `H_(2)=(x)/(15)+(2-x)/(30)=(2.24)/(22.4)=(1)/(10)`
or, x=1g.