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प्रश्न
Give two examples of the following.
Non-metals which are solids
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उत्तर
Phosphorus, Sulphur
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Name the technique that you use if only the solid component of a solution is required.
Give two examples of the following.
Non-metals which are lustrous
Define: Formula
State the number of atoms of H2SO4
Indicate whether the following statement is true or false:
Ozone is a triatomic molecule
Match the separation of components in List I with the most appropriate process in List II.
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | A: Separating funnel |
| 2. Cream from milk. | B: Sublimation |
| 3. Kerosene oil from kerosene oil & water. | C: Boiling |
| 4. Lead nitrate from an aqueous solution of lead nitrate. | D: Centrifugation |
| 5. Ammonia from an aqueous solution of ammonia. | E: Distillation |
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
Matter is its simplest form is called ______.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
