1. | Which of the following is not a physical change? |
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Hint
Half-n-half Clue
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2. | What is the combination of any substance with oxygen known as? |
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3. | Catalysts often speed up certain chemical reactions. |
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4. | If no more solute can be dissolved in a solvent at a given temperature then that solution is called |
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5. | Fill in the missing word Acid + _______ = Salt + Water |
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6. | A substance which speeds up a chemical reaction without itself getting affected is known as a |
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7. | Acids change a litmus paper from |
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