| 1 |
___________ is a pure substance that can be broken down. |
- A. Matter
- B. Element
- C. Mass
- D. Mixture
|
| 2 |
Electron _____________ energy when thy jump from higher to lower level. |
- A. Absorb
- B. Radiate
- C. Nothing
- D. Nil
|
| 3 |
Identify when pair has polar covalent bonds:<br> |
- A. O<sub>2</sub> and Cl<sub>2</sub><br>
- B. H<sub>2</sub>O and N<sub>2</sub><br>
- C. H<sub>2</sub>O and C<sub>2</sub>H<sub>2</sub><br>
- D. H<sub>2</sub>O and HCI<br>
|
| 4 |
How many time liquids are denser than gases?<br> |
- A. 100 times <br>
- B. 1000 times <br>
- C. 10,000 times<br>
- D. 100,000 times<br>
|
| 5 |
By electrolytic refining of copper , it is ____________ % pure. |
- A. 98
- B. 99
- C. 99.99
- D. 100
|
| 6 |
The example of solid solute in gas solvent is |
- A. butter
- B. Sugar in water
- C. Smoke in air
- D. Opals
|
| 7 |
In ionic bond complete ________________ of electrons occurs. |
- A. Paring
- B. Sharing
- C. Transfer
- D. None
|
| 8 |
Half life of C-14 ________________ years. |
- A. 5800
- B. 5700
- C. 5600
- D. 5500
|
| 9 |
................. can be decomposed into simpler substanmce. |
- A. Compound
- B. Element
- C. Solution
- D. Mixture
|
| 10 |
All metals are solid except |
|
