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प्रश्न
Indicate whether the following statement is true or false:
Noble gases are high reactive
पर्याय
True
False
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उत्तर
False
Correct Statement: Noble gases are non-reactive
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संबंधित प्रश्न
Give two examples of the following.
Metals which are soft
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The most abundant element in the earth’s crust is _______.
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The most abundant element in the atmosphere is _______.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Classify substances into pure and impure substances in the form of a chart or tabulation.
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
Define the term ‘compound’. In the compound carbon dioxide – the elements carbon & oxygen are combined in a fixed ratio. Explain.
Name the process associated with the following
A fine beam of light entering through a small hole in a dark room illuminates the particles in its paths.
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.
Give an account of elements known to us.
