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10th CBSE
IMPORTANT
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The products formed when sodium sulphite is made to react with dilute hydrochloric acid are-

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Important Questions on Practicals

HARD
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 54
When SO2 gas is passed through an acidified solution of K2Cr2O7, the orange colour of the solution changes to
HARD
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 55
Name the substance which is used to prepare blue-black ink.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 56
Sulphur dioxide gas is dried by passing through concentrated H2SO4 because-
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 57
Sulphur dioxide gas should not be inhaled directly because
EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 58
When a flower bleached by sulphur dioxide is brought in contact with air and light 
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 59
When SO2 gas is allowed to react with acidified potassium dichromate solution, the yellow colour of the solution changes to green. This is due to the formation of 
EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 60
Metals that lie above hydrogen in the activity series are known as 
EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 9 - Practicals>EXERCISES>Q 61
In the reaction, Mg+CuSO4→MgSO4+Cu, Mg acts as