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प्रश्न
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
विकल्प
True
False
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उत्तर
Compounds and elements are pure substances- True
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संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
Write true or false
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
What is the proportion of element present in the following compound?
H2O
What is the proportion of element present in the following compound?
CO2
Give the example of a compound containing nitrogen and oxygen.
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to existence
What is the molecular formula of the following compound?
Hydrochloric acid
Explain the term mixture.
Assertion: Air is a compound.
Reason: Air consists of carbon dioxide.
Complete the table
| Compound | Constituent elements |
| Sodium carbonate | Sodium, Carbon. Oxygen |
| Water | |
| Calcium oxide | |
| Sugar | Carbon, Hydrogen, Oxygen |
