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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Fuels which do not leave any residue on burning are
विकल्प
coal and wood
coal and LPG
wood and CNG
LPG and CNG
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उत्तर
LPG and CNG
APPEARS IN
संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
What is greenhouse effect?
Why can’t we see air?
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Name two air pollutants which affect our health.
Name the important scientists and their studies which led to the discovery of the components of air.
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
Take a squeezable bottle. Make a hole on the lid and close the bottle tightly. Bring the bottle near your face and press the bottle. What do you feel?
What is global warming?
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
