Chemical Bonding

Chemical Bonding

Which of the following are non-polar ?

Q: Which of the following are non-polar ?

(A)NF3                                                           

(B) BF3

(C)SF4                                                            

(D) SiF4

Ans: (B) & (D)

Select the correct statements

Q: Select the correct statements:

(A) the heat of hydration of the dipositive alkaline earth metals ions decrease with an increase in their ionic size.

(B) hydration of alkali metal ions is less than that of IIA

(C) alkaline earth metal ions, because of their much larger charge to size ratio exert a much stronger electrostatic attraction on the oxygen of water molecule surrounding them.

(D) melting point of sodium halides follow order

NaF  > NaCl  > NaBr  > NaI

Ans: (A), (B), (C), (D)

Which are the species in which central atom undergoes sp3 hybridisation?

Q: Which are the species in which central atom undergoes sp3 hybridisation?

(A) SF4

(B) SCl2

(C) SO42–

(D) H2O

Ans: (B), (C) & (D)

Which among the following are isostructural

Q: Which among the following are isostructural

(A) CO2,

(B) XeO2F2, SF4

(C) SO32- ,CO32-

(D) ClF3, XeF2

Ans: (A) & (B)

Bond angle in PH3 is

Q: Bond angle in PH3 is

(A) much less than NH3

(B) Much less than PF3

(C) slightly more than NH3

(D) much more than PF3

Ans: (A) & (B)