CHEMICAL BONDING
Single answer type questions:
1. Bond angle in the following conversions decreases except when
a) NH4+ into NH3 b) NH2-1 into N3-1
c) SO3 into SO2 d) CO2 into CO3-2
2. A + 2 B + H2 O C + 2 D
If A = HNO2, B = H2SO3 and C = NH2OH, then geometry of D will be
(A) trigonal planar (B) Bent
(C) tetrahedral (D) linear
3. Which of the following pairs of molecules have identical shapes:
a) CF4 , SF4 b) BF3 , PCl3 c) XeF2 , CO2 d) PF5 , IF5
4. Lattice energy of an ionic compound depends upon:
a) charge on the ions only b) size of the ions only
c) inter ionic distance only d) charge on the ion and size of the ion
5. The pair that has similar shape is
(A) BF3 , BrF3 (B) S2 F2 , S2Cl2 (C) O2 F2 , S2Cl2 (D) B2 H 6 , N 2 H 4
6. Which of the following are isoelectronic and isostructural ?
(A) NO3 ,CO32 (B) SO3,NO3
(C) ClO 3
(D) CO2 3
7. Metallic lustre is explained by
(A) diffusion of metal ions (B) oscillation of loose electrons
(C) excitation of free protons (D) existence of bcc lattice
8. According to MO theory which of the list ranks the oxygen species in terms of
increasing Bond order O2 , O2 , O2 , O22
A) O22 , O2 , O2 , O2 B) O2 , O2 , O2 , O22 C) O2 , O2 , O2 , O22 D) O22 , O2 , O2 , O2
9. In the compounds of the type ECl3 where E B, P, As or Bi the angles Cl E Cl for
different elements E are in the order
A) B P As Bi B) B P As Bi C) B P As Bi D) B P As Bi
10. The dipole moment of HBr is 2.6 1030 coloumb meter and inter atomic spacing is
1.41Ao , what is the % Ionic character of HBr
A) 99.5% B) 11.6% C) 74.3% D) 25%
11. The hybridization of IO2 F2 with geometry is
A) sp 3 d 2 with linear B) sp 3 with pyramidal
C) sp 3 d with see-saw structure D) dsp 2 with square planar
12. Which of the following molecule is having maximum dipolemoment where ‘A’
is the central atom. ?
A) AX 3 (having one lp on central atom) B) AX 4 (tetrahedral
with no lp)
C) AX 4Y (no lp on central atom) D) AX 4Y2 (no lp on central atom)
13. Which has maximum covalent character?
A) MgCl2 B) SiCl4 C) AlCl3 D) NaCl
14. Which one of the following pairs is paramagnetic ?
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A) B) C) D)
15. Bond angle decreases except when
(a) NH 4 is converted to NH3 (b) NH 2 is converted to N3
(c) SO3 is converted to SO2 (d) CO2 is converted to CO32
16. Which of the following pairs have same hybridization about the central atom?
(A) SF4/SiF4 (B) NO 3 / NF3
(C) S2 O82 / S2 O 32 (D) BrF5 / IF7
17.
A molecular contain two , two bonds and one lone pair of
electrons in valence shell of X. The arrangement of electron pairs around X is :
A) Square B) C) D)
Linear Trigonal planar Data insufficient
Pyramidal
18.
The orbital used for formation of single bond in molecule is
A) B) C) D) Any of these
19. Which of the following two are isostructural ?
a) CO32 , SO32 b) NH 3 , BH 3 c) XeF2 , IF2 d) PCl5 , ICl5
20. Which of the following molecules has non-zero dipolemoment?
A) ClF3O2 B) XeO3F2 C) (CH3)3P(CCl3)2 D) (SiH3)3N
21 In which of the following does the overlap of two orbitals give a non bonding
interaction ?
A) + - + B) - + +
+
C)
- + + - D) +
-
CO32 , NO3 , BO33
22. The correct increasing order of extent of -bonding in above
I II III
molecules are
(A) I < II < III (B) III < II < I
(C) III < I < II (D) II < III < I
23. Which of the following is V-shaped
(A) S32 (B) I3 (C) N 3 (D) none of these
24. Amongst the following statements
I : The structure of [BrF4]+ is regular tetrahedral
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II : Bond order of O2 decreases by the removal of an electron
III : Br3 and Br3 are having same shape and same structure
IV : The hybrid orbital of phosphorous in PCl5 is sp3dxy
The incorrect statements is/are
(A) only II (B) I, III, IV
(C) I, II, III (D) I, II, III, IV
25. Bond angle decreases except when
(a) NH 4 is converted to NH3 (b) NH 2 is converted to N3
(c) SO3 is converted to SO2 (d) CO2 is converted to CO32
26. The pair that has same hybridization is
A) NOCl , NO2 B) SF4 , SO4 2
C) PCl3 , BCl3 D) NO3 , BH 4
27.
28.
29. The values of electronegativity of atoms A and B are 1.20 and 4.0
respectively. The percentage of ionic character of A – B bond is
(a) 50 % (b) 43 %
(c) 55.3 % (d) 72.24%
30. O is the symbol of ….. ion
2
2
(a) Oxide (b) Superoxide
(c) Peroxide (d) Monoxide
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