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Give two examples of non-metallic oxides.
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State one method by which :
- Oxygen is added to air
- Carbon dioxide is added to air
- Oxygen is removed from the air
- Carbon dioxide is removed from the air
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Give reasons to support the fact that air is a mixture.
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Name the products formed when a candle burns in air.
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Discuss two useful applications of greenhouse effect.
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Particles of matter possess energy due to their random motion. Compare the particles in a solid, liquid and in gas with reference to the amount of kinetic energy possessed by each.
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Describe simple experiment to show that particles of matter have the intermolecular attraction
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State the correct term from A, B, C, D, E or F in List II which represents the – change of state of matter or its relevant property from List I
| List I | List II |
| 1. Solid 'X' to a liquid 'Y' | A: Liquefaction |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Solidification |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting Point |
| F: Boiling point |
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Fill in the blank:
Matter made up of one kind of particle is said to be _________.
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Match the arrangement of atoms in the three states of matter in List I with the correct state in List II.
| List I | List II |
| 1. Arrangement of atoms, very closely packed | A: Solids |
| 2. Interparticle space is maximum | B: Liquids |
| 3. Force of attraction between particles is very weak | C: Gases |
| 4. Movement of particles is about their own position | |
| 5. Particles in the state of matter are slightly compressible and not closely packed. |
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Give a reason for the following:
Globules of mercury kept in a petri dish, which is shaken slowly, come together forming a big globule.
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Give a reason for the following:
A crystal of iodine on slow heating in a closed flask turns into vapours and fills the complete flask.
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Give a reason for the following:
An empty tumbler lowered into a glass beaker containing water, on tilting shows bubbles of air coming out, but when not tilted, no bubbles are seen.
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With reference to the following metals state their use in daily life metal:
copper
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With reference to the following metals state their use in daily life metal:
iron
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With reference to the following metals state their use in daily life metal:
Aluminium
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With reference to the following metal state its use in daily life:
Magnesium
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With reference to the following metals state their use in daily life metal:
Zinc
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With reference to the following metals state their use in daily life metal:
Lead
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With reference to the following metals state their use in daily life metal:
Silver
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