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| 2) Atoms with different electronegativities | b) acceptor bond |
| 3) Atom which accepts electron pair | c) covalent bond |
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| 5) Atom which provides electron pair | e) oxidation |
| f) ionic bond |
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| 2.Saturn | b) Greenish star |
| 3.Neptune | c) Rocky planet |
| 4.Venus | d) Lightest planet |
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| 1. | Alkyne | Bucky Ball |
| 2. | Andre Geim | Oxidation |
| 3. | C60 | Graphene |
| 4. | Thermocol | Triple bond |
| 5. | Combution | Polystyrene |
| 1. Ganymede | a) Neptune |
| 2. Triton | b) Jupiter |
| 3. Titan | c) Mars |
| 4. Phobas | d) Saturn |
Match the following.
| 1. | Density | hρg |
| 2. | 1 gwt | Milk |
| 3. | Pascal’s law | $\frac{\text { Mass }}{\text { Volume }}$ |
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Match the following.
| 1. | Tuning fork | The point where density of air is maximum |
| 2. | Sound | Maximum displacement from the equilibrium position. |
| 3. | Compressions | The sound whose frequency is greater than 20,000 Hz. |
| 4. | Amplitude | Longitudinal wave. |
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Match the following.
| a. | Dalton | 1. | Hydrogen atom model |
| b. | Chadwick | 2. | Discovery of nucleus |
| c. | Rutherford | 3. | First atomic theory |
| d. | Neils Bohr | 4. | Plum pudding model |
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| 1) Hardest substance in our body | a) Aluminium phosphate |
| 2) Citrus fruits | b) Potash alum |
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| 1. Vacuum drying | a. Vegetables |
| 2. Cold storage | b. Seeds |
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| Column I | Column II |
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| 2. Electrical energy | b) Coulomb |
| 3. Electric charge | c) Watt |
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