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Sulphur dioxide turns acidified potassium dichromate solution 

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Important Questions on Practical Chemistry

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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 15
Red ppt. formed during the test of iron, is of 
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 16
Copper salt reacts with NH4OH to give
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 17
A student adds a few drops of the universal indicator to a solution of dilute hydrochloric acid in the way shown here. He would observe that the colour of the solution changes from colourless to
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 18
A salt which burns with apple green flame is 
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 19
Cadmium chloride reacts with hydrogen sulphide to form 
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 20

A student added acetic acid to test tubes I, II, III and IV containing the labelled substances and then brought a burning splinter near the mouth of each test tube.

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The splinter would be extinguished when brought near the mouth of test tube

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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 21
A test to detect nitrate ion is 
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 10 - Practical Chemistry>EXERCISE>Q 22
Borax bead test is given by