| Choose the correct option: |
| (i) Plants take \[C{{O}_{2}}\] from the atmosphere mainly through their: |
| Choose the correct option: |
| (ii) The Bile juice is stored in: |
| Choose the correct option: |
| (iii) Which of the following does not yield wool? |
| Choose the correct option: |
| (iv) Heat is: |
| Choose the correct option: |
| (v) Neutralisation is a reaction between: |
| Choose the correct option: |
| (vi) Which one is a chemical change? |
| Choose the correct option: |
| (vii) The water vapour present in the air condenses in the form of: |
| Choose the correct option: |
| (viii) Water vapour comes to atmosphere due to: |
| Choose the correct option: |
| (ix) The branchy part of a tree above the stem is known as: |
| Choose the correct option: |
| (x) Sewage is mainly a: |
| (i) What is solar day? |
| (ii) What is a battery? |
| (iii) What is a plane mirror? |
| (iv) What is water table? |
| (v) Name some carnivores. |
| (vi) Which gas is released during treatment of sludge? |
| Paheli observed that most of the fish in the pond of her village were gradually dying. She also observed that the waste of a factory in their village was flowing into the pond which probably caused the fish to die. |
| (i) Explain why the fish were dying. |
| (ii) If the factory waste is acidic in nature, how can it be neutralised? |
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