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प्रश्न
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
उत्तर
A candle burns in ajar of oxygen, but gets extinguished in nitrogen.
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Why can’t we see air?
Write the chemical name of Lime water
Tick (√) the correct alternative from the choice given for the following statement.
Fuels which do not leave any residue on burning are
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
The capacity of air to hold moisture depends upon the ______ of the air.
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
The composition of air is always exactly the same.
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of airflow |
| (e) | Wind | (v) | Prevent dust particles |
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
