Structure and bonding

Structure and bonding : in homo- and heteronuclear molecules, including shapes of molecules (VSEPR Theory).

YEAR JUN-2016 DEC-2015 JUN-2015 DEC-2014 JUN-2014 DEC-2013 JUN-2013 DEC-2012 JUN-2012 DEC-2011 JUN-2011
No.of questions appeared 3   4 1 1 2 2 3 1 3 3 4

1. The total number of lone pairs of electrons in I3is:

(a) Zero

(b) Three

(c) Six

(d) Nine

 

2. The strength of pΠ-dΠ bonding in E–O (E = Si, P, S and C) follows the order

(a) Si – O > P – O > S – O >Cl – O

(b) P – O > Si – O > S – O >Cl – O

(c) S – O >Cl – O > P – O > Si – O

(d) Cl – O > S – O > P – O > Si – O

 

3.The decreasing order of dipole moment of molecules is

(a) NF> NH3 > H2O

(b) NH3 > NF3 > H2O

(c) H2O > NH3 > NF3

(d) H2O > NF3 > NH3

 

4.Which ones among CO32-, SO3, XeO3 and NO3have planar structure?

(1) CO32–, SO3 and XeO3

(b) NO3, SO3 and XeO3

(c) CO32- , NO3 and XeO3

(d) CO32- , SO3 and NO3

 

5.The correct schematic molecular energy diagram for SF6 molecule is

sulphur-hexafluoride-molecule-hybradization-csir-net-gate-chemical-sciences dec-2014

 

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