Question

Identify the element X in
the compound X2(CO3)3
options
sodium
aluminium
magnesium
barium​

Answer 1

Answer:

The formula signifies valancy

X=3 And Co3=2 using criss cross method

valency of Po4=3

XPo4

again

valancy of cl=1

XCl3

Answer 2

Explanation:

OPTION (b)

OPTION (A) sodium have valance =1 Na2CO3 from which is not given compound so option (a) is incorrect

OPTION (B) Aluminium have valance =3 Al2(CO3)3 from which is given compound so option (b) is incorrect

And Option (c) and (d) from the compound MCO3 so there are incorrect.

Final answer is option (b)