Q.1. Which one of the following properties is not shown by NO?
(a) it is diamagnetic in the gaseous state
(b) it is a neutral oxide
(c) it combines with oxygen to form nitrogen dioxide
(d) its bond order is 2.5
Correct Answer is Option (a)
Q.2. The compound which contains both ionic and covalent bond:
(a) KCl
(b) KCN
(c) CH4
(d) H2
Correct Answer is Option (b)
Q.3. Which of the following compounds has the smallest bond angle in its molecule?
(a) H2O
(b) H2S
(c) NH3
(d) SO2
Correct Answer is Option (b)
Q.4. The maximum number of 90° angles between bond pair-bond pair of electrons is observed in
(a) dsp2 hybridisation
(b) sp3d hybridisation
(c) dsp3 hybridisation
(d) sp3d2 hybridisation
Correct Answer is Option (d)
Q.5. Which one of the following pairs of molecules will have permanent dipole moments for both members?
(a) NO2 and CO2
(b) NO2 and O3
(c) SiF4 and CO2
(d) SiF4 and NO2
Correct Answer is Option (b)
Q.6. Ether is more volatile than alcohol having the same molecular formula. This is due to
(a) alcohols having resonance structures
(b) intermolecular hydrogen bonding in ethers
(c) intermolecular hydrogen bonding in alcohols
(d) the dipolar character of ethers
Correct Answer is Option (c)
Q.7. In which solvent NaCl has maximum solubility?
(a) H2O
(b) C2H5OH
(c) CH3COCH3
(d) C2H5OC2H5
Correct Answer is Option (a)
Q.8. The main axis of a diatomic molecule is z, molecular orbital px and py overlap to form which of the following orbital?
(a) pi molecular orbital
(b) sigma molecular orbital
(c) gamma molecular orbital
(d) No bond will be formed
Correct Answer is Option (a)
Q.9. BCl3 is a planar molecule whereas NCl3 is pyramidal because
(a) B-Cl bond is more polar than NaCl bond
(b) N-Cl bond is more covalent than B-Cl bond
(c) the nitrogen atom is smaller than boron atom
(d) BCl3 has no pair but NCl3 has a lone pair of electrons
Correct Answer is Option (d)
Q.10. Total number of lone pair of electrons in I3- ion is
(a) 3
(b) 6
(c) 9
(d) 12
Correct Answer is Option (c)
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1. What is hybridization and why is it important in the study of molecules? |
2. How can we determine the hybridization of an atom in a molecule? |
3. What are the different shapes of molecules based on hybridization? |
4. How does hybridization affect the bond angles in a molecule? |
5. Can hybridization explain the shapes of all molecules? |
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