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प्रश्न
Complete and balance the following chemical equation.
\[\ce{HgO ->[heat]}\] ______ + _______
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उत्तर
\[\ce{2HgO ->[heat] 2Hg + O2}\]
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संबंधित प्रश्न
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Fill in the blanks :
_______ and ______ are the most common air pollutants.
A fuel when used releases least amount of pollutants in the air.
Give reason:
When water is heated, we see bubbles rising up.
State four different properties of a compound and a mixture.
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Match the following
| 1. | Moving Air | Photosynthesis |
| 2. | Layer in which we live | Troposphere |
| 3. | Stratosphere | Wind |
| 4. | Oxygen | Ozone layer |
| 5. | carbon-di-oxide | Combustion |
The Scottish chemist ______ discovered carbon dioxide is present in air.
What was the old name of nitrogen?
The composition of air changes slightly from place to place. Give examples.
