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प्रश्न
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 |
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उत्तर
| List I | LIst II | ||
| 1 | Fluorine and chlorine | E | Halogens |
| 2 | A diatomic molecule | A | Nitrogen |
| 3 | A molecule containing the elements hydrogen and oxygen. | F | Water |
| 4 | A metalloid - showing properties of both metals and non-metals. | B | Boron |
| 5 | The term used for the substances which take part in the chemical reaction | C | Reactants |
| 6 | The term which represents a substance by means of symbols. | D | Chemical Formula |
| 7 | The term used for the substances formed as a result of a chemical reaction | H | Products |
| 8 | A compound containing one atom of zinc and two atoms of chlorine. | J | Zinc Chloride |
| 9 | The chemical name for nitrogen monoxide. | G | Nitric Oxide |
| 10 | A polyatomic molecule. | I | Phosporis |
संबंधित प्रश्न
Define mixture.
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
Correct the following statement:
CO and Co both represents cobalt.
Give Two Examples for Each of the Following: Non-metals
Give Two Examples for Each of the Following: Inert Gases
Tick (√) the correct alternative from the choice given for the following statement.
Sulphur and carbon are
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Give two example of elements.
Name the element which is used in toothpaste to strengthen our teeth.
