Test Instructions
Attempt this after finishing Chemistry chapters 7 to 11. Keep 60 minutes and check equations carefully.
Marks Plan
| Section | Questions | Marks |
|---|---|---|
| One-mark | 10 | 10 |
| Two-mark | 5 | 10 |
| Five-mark | 3 | 15 |
| Formula or equation | 1 | 5 |
| Total | 19 | 40 |
One-Mark Questions
1. Define atom. 2. What is atomicity? 3. Write Avogadro number. 4. State the modern periodic law. 5. What is a group? 6. Define saturated solution. 7. What is oxidation? 8. What is reduction? 9. Define catenation. 10. What is a hydrocarbon?
Two-Mark Questions
1. Differentiate between atom and molecule. 2. Why do elements in the same group show similar properties? 3. Differentiate between saturated and unsaturated solutions. 4. Why should chemical equations be balanced? 5. Differentiate between saturated and unsaturated hydrocarbons.
Five-Mark Questions
1. Explain mole concept with formulae. 2. Explain the types of chemical reactions with examples. 3. Explain tetravalency and catenation of carbon.
Formula or Equation Practice
Answer any one:
1. Calculate number of moles in a given mass using moles = mass / molar mass. 2. Balance a chemical equation and identify the reaction type.
Correction Checklist
- Avogadro number written correctly
- Periodic trends not reversed
- Concentration formula uses mass or volume of solution
- Equations balanced using coefficients
- Functional groups revised again after test