Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Chemistry General Principles And Process of Isolation of Elements
The electronic configuration of 3 elements X, Y and Z are:
X = 2, 4
Y = 2, 7
Z = 2, 1
Which of the following compounds can be formed?
1
X2Y
2
XZ3
3
YZ
4
More than one of the above
5
None of the above