| 1 |
Down the VII -A group, polarizability generally. |
- A. Increases
- B. Decreases
- C. Remain constant
- D. Negligible
|
| 2 |
When water freezes, its volume increase. |
- A. 12%
- B. 9%
- C. 15%
- D. 18%
|
| 3 |
When liquid water changes to ice its volume expands. The expansion in volume is. |
- A. 5%
- B. 9%
- C. 10%
- D. 18%
|
| 4 |
The molecules of CO2 i dry ice form the. |
- A. Ionic crystals
- B. Molecular crystals
- C. Amorphous
- D. Covalent crystals
|
| 5 |
Molecular crystals are generally |
- A. Hard
- B. Relatively soft
- C. Unstable
- D. do not exist
|
| 6 |
Which one of the following substances is not amorphous |
- A. Polymer
- B. Rubber
- C. Glass
- D. AgNO<sub>3</sub>
|
| 7 |
Allotropy is the property of. |
- A. Compound
- B. Element
- C. Atom
- D. Mixtuer
|
| 8 |
In which , case particles are separated from each other. |
- A. Fusion
- B. Condensation
- C. Neutralizations
- D. Vaporization
|
| 9 |
NH<sub>3</sub>shows a maximum boiling point among the hydrides of V-A group elements due to |
- A. Very small size of nitrogen
- B. Lone pair electrons present on Nitrogen
- C. Enhanced electronegative character of Nitrogen
- D. Pyramidla structure of NH<sub>3</sub>
|
| 10 |
Diamond is a bad conductor because. |
- A. It has tight structure.
- B. It has a high density
- C. There is no free electron present in the crystal of diamond to conduct electricity
- D. None of the above
|