Molecules (Grades 11-12)
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Molecules
1.
According to VSEPR theory, what is the bond angle of compounds that are octahedral in shape?
- 180[math]deg[/math]
- 120[math]deg[/math]
- 90[math]deg[/math]
- 72[math]deg[/math]
2.
According to VSEPR theory, what is the order in which repulsions between electron pairs decreases?
- lone pair-lone pair> lone pair-bond pair> bond pair-bond pair
- lone pair-lone pair> bond pair-bond pair>lone pair-bond pair
- bond pair-bond pair>lone pair-bond pair>lone pair-lone pair
- lone pair-bond pair>lone pair-lone pair>bond pair-bond pair
3.
Which of the following parameters increases with a decrease in the size of a bonding pair of electrons?
- Electronegativity
- Ionization potential
- Hydration energy
- Solvation energy
4.
Which of the following molecules has a distorted tetrahedral shape?
- Ammonia molecule
- Chlorine trifluoride
- Dichloroiodate ion
- Bromine pentafluoride
5.
What can you predict according to VSEPR theory, provided you know the distribution of orbitals containing electronic pairs around the central atom?
- shape of the molecule and bond angle
- heat of formation of molecule
- solvation energy of molecule
- lattic energy of molecule
6.
What hybridization does chlorine trifluoride undergo?
- [math]sp^3d[/math]
- [math]sp^2[/math]
- [math]sp^3d^3[/math]
- [math]sp^3d^2[/math][math][/math]
7.
Who proposed the VSEPR theory for the first time in 1940?
- Sidgwick and Powell
- A.F. Kapustinskii
- M. Born and F.Haber
- Van der Waals
8.
Which of the following molecules is linear in shape?
- [math]BeCl_2[/math]
- [math]CH_4[/math]
- [math]H_2O[/math]
- [math]NH_3[/math]
9.
What is the experimentally observed bond angle of a water molecule?
- [math]104.5deg[/math]
- [math]90deg[/math]
- [math]120deg[/math]
- [math]72deg[/math]
10.
The presence of lone pair in [math]IF_5[/math] molecule distorts its shape from to .
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