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प्रश्न
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 |
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उत्तर
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | B: Sublimation |
| 2. Cream from milk. | D: Centrifugation |
| 3. Kerosene oil from kerosene oil & water. | A: Separating funnel |
| 4. Lead nitrate from an aqueous solution of lead nitrate. | E: Distillation |
| 5. Ammonia from an aqueous solution of ammonia. | C: Boiling |
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
Why is it necessary to separate the constituents of a mixture.
State the number of atoms of C6H12O6
Fill in the blank
The most abundant element in the earth’s crust is _______.
Tick (√) the correct alternative from the choice given for the following statement
A metal which is brittle
Match the statements in List I – 1 to 10 correct answers in List II-A to J.
| List I | LIst II | ||
| 1 | Fluorine and chlorine | A | Nitrogen |
| 2 | A diatomic molecule | B | Boron |
| 3 | A molecule containing the elements hydrogen and oxygen. | C | Reactants |
| 4 | A metalloid - showing properties of both metals and non-metals. | D | Chemical Formula |
| 5 | The term used for the substances which take part in the chemical reaction | E | Halogens |
| 6 | The term represents a substance by means of symbols. | F | Water |
| 7 | The term used for the substances formed as a result of a chemical reaction | G | Nitric Acid |
| 8 | A compound containing one atom of zinc and two atoms of chlorine. | H | Products |
| 9 | The chemical name for nitrogen monoxide. | I | Phosphorus |
| 10 | A polyatomic molecule. | J | Zinc Chloride |
Write the names of elements from the following symbol:
Cd
Give an account of elements known to us.
Reason out
Elements are called semimetals.
