| 1. | In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate ? | |
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Potassium sulphate
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Ammonium nitrate
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Lead acetate
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Lead sulphate (insoluble)
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Report Question| 2. | When S02 gas is passed through saturated solution of H2S, which of the following reaction occurs ? | |
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SO2 + H2O -> SO3 + H2
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SO2 + 2H2S -> 2H20 + 3S
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SO2 + H2S -> H2O + S
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SO2 + 2H2S -> H20 + 3S
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| 3. | In the reaction Hg2Cl2 + Cl2 -> 2HgCl2 The reducing agent is ? | |
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HgCl2
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Cl2
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Both Cl2 and HgCl2
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Hg2Cl2
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| 4. | A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation ? | |
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KMnO4 is an unstable compound and de-composes in presence of FeSO4. to a colourless compound
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KMnO4 is an oxidising agent, it oxidises FeSO4
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The colour disappears due to dilution; no reaction is involved
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FeSO4 acts as an oxidising agent and oxidises KMNO4
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| 5. | Name the products formed when iron filings are heated with dilute hydrochloric acid ? | |
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Fe (II) chloride and hydrogen gas
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Fe (III) chloride and hydrogen gas
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Fe (II) chloride and water
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Fe (III) chloride and water
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