Schematic structures of three species are given here. Study the structures carefully and select the correct statements. I. P, Q and R all are metals. II. `Q^(2-)` has complete octet in L shell and `R^(3-)` has complete octet in M shell. III. Q and R combine to form `Q_3R`. IV. P and R will combine to form PR. V. Mass number of Q is 18 while that of R is 31.
A
I, III and IV only
B
II, IV and V only
C
I, II and V only
D
II and V only
Text Solution
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The correct Answer is:
B
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