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प्रश्न
Fill in the blank
The most abundant element in the atmosphere is _______.
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उत्तर
The most abundant element in the atmosphere is nitrogen.
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संबंधित प्रश्न
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture
What is the difference between a pure substance and a mixture ?
Give two examples of the following.
Non-metals which are lustrous
Find the atomicity of the Following molecule:
Calcium Chloride
Find the atomicity of the Following molecule:
Aluminium Suiphide
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 |
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Explain the difference between Atoms and molecules.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?
