1. | A substance which speeds up a chemical reaction without itself getting affected is known as a |
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2. | Which of the following is a chemical change? |
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3. | The lead of a pencil mainly contains |
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4. | Fill in the missing word Acid + _______ = Salt + Water |
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5. | Acids change a litmus paper from |
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6. | What gas is evolved when dilute sulphuric acid is added to Zinc? |
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7. | If no more solute can be dissolved in a solvent at a given temperature then that solution is called |
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