Chemical Bounding

Q: The structure of 1F5 is based on which configuration?

(a) :  Tetrahedral
(b) :  Octahedral
(c) :  Square antiprismic
(d) :  Trigonal bipyramidal
(e) :  None of the Above
Answer:  Octahedral
Explanation:  The central atom of IF,. Iodine has five a bonds and one lone pair sround it. The best structure for these six constituents is octahedral

Q: Which of the following substance has the least ionic character in its bond ?

(a) :  CCl4
(b) :  KCl
(c) :  NaCl
(d) :  BaCl2
(e) :  None of the Above
Answer:  CCl4
Explanation:   Ionic character is greatest in a combination between a metal and non-metal e.g., KCI NaCI, BaCl2. Carbon is not classified as metal. It is hard. brittle and amorphous element. 11 will have the weakest ionic character because the tendency to produce positive ions decreases rapidly across a period and increases downward within group.

Q: Which ion has the most shells that contain electrons?

(a) :  Al3+
(b) :  Be2+
(c) :  N3-
(d) :  S2-
(e) :  None of the Above
Answer:  S2-

Q: Which substance has greatest lattice energy ?

(a) :  Kl
(b) :  NaF
(c) :  CuBr
(d) :  MgO
(e) :  None of the Above
Answer:  MgO
Explanation:   Lattice energy is measure of how much stabilization result from packing of oppositely charged ions together in an ionic compound. MgO has greatest lattice energy. MgO is only substance of those listed with charges of positive two (4-2) and negative (-2).

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