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A teacher gave an impure sample of alum ...

A teacher gave an impure sample of alum containing fine sand as impurity to a student. He asked him to recover pure alum from this sample. The correct procedure to be followed would be to :

A

dissolve the impure sample of alum in water, filter and evaporate the filtrate

B

dissolve the impure sample of alum in alcohol and filter

C

move a magnet over the impure sample of alum

D

dissolve the impure sample of alum in carbon disulphide, filter and evaporate the filtrate

Text Solution

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The correct Answer is:
A
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
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  2. A student has done the labelling for the experimental set-up for separ...

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  3. A teacher gave an impure sample of alum containing fine sand as impuri...

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  4. The colour of residue left behind on heating lead nitrate when it is s...

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  5. A student took some lead nitrate compound in a boiling tube and heated...

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  6. When a student heated a colourless solid compound, then brown fumes of...

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  7. When dilute sulphuric acid is added to granulated zinc placed in a tes...

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  8. What is the correct order of the methods you would apply to separate t...

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  9. Four students took separately the mixture of sand, common salt and amm...

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  10. When zinc metal reacts with dilute sulphuric acid, a gas is evolved. W...

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  11. The reaction between iron and copper sulphate solution represents whic...

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  12. When a burning magnesium ribbon is introduced in a gas jar containing ...

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  13. A student heats calculated amounts of iron filings and sulphur powder ...

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  14. Which of the following mixture can be separated completely by the proc...

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  15. Four set ups as given here were arranged to identify the gas evolved w...

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  16. An iron nail was dropped into copper sulphate solution. After some tim...

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  17. A student was asked by her science teacher to prepare a true solution....

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  18. A student placed a clean iron nail in blue coloured copper sulphate so...

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