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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
पर्याय
Oxygen
Diamond
Zinc
Graphite
Gold
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उत्तर
Diamond
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संबंधित प्रश्न
Tick the most appropriate answer.
The constituents of a mixture are present in
- a fixed ratio
- a variable ratio,
- the ratio of 2: 1
- none of these
Differentiate between:
Homogenous and heterogenous substances
Name: the Hardest Naturally Occurring Substance
Match the Columns:
| Column A | Column B | ||
| (a) | Metals | (i) | Non-Reactive |
| (b) | Molecules | (ii) | Brittle |
| (c) | Non-Metals | (iii) | Lustrous |
| (d) | Noble Gases | (iv) | Smallest unit of Compound |
Write the names of elements from the following symbol:
Si
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
Select the correct answer to the statement given below:
A metalloid
Explain the term ‘mixture’.
Give a reason for the following statement :
The filter paper made into a cone & placed in a funnel for filtering out the solid particles in a solid-liquid mixture should be moistened before placing it.
Elements are made up of______ kinds of atoms.
