Chemical Bonding And Molecular Structure Question 325

Question: An atom of an element A has three electrons in its outermost shell and that of B has six electrons in the outermost shell. The formula of the compound between these two will be [CPMT 1974, 84; RPMT 1999]

Options:

A) $ A_3B_4 $

B) $ A_2B_3 $

C) $ A_3B_2 $

D) $ A_2B_3 $

Show Answer

Answer:

Correct Answer: B

Solution:

Valency of A is 3 while that of B is 2 so according to Criss Cross rule the formula of the compound between these two will be $ A_2B_3 $ .



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