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The following precautions were listed fo...

The following precautions were listed for the experiment on determination of melting point of ice. The incorrect precaution is :

A

The bulb of the thermometer should be kept surrounded with crushed ice

B

Ice should be stirred regularly to keep a uniform temperature throughout

C

The final temperature should be noted by keeping the eyes in line with the level of mercury

D

Only the tip of the bulb of the thermometer should just touch the crushed ice

Text Solution

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The correct Answer is:
D
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
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  12. A student, by mistake, mixed sulphur powder with iron filings. The fol...

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  13. A student has done the labelling for the experimental set-up for separ...

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

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

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

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

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

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