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Byju's Answer
Standard IX
Chemistry
Precipitation Reaction
When a soluti...
Question

When a solution of sodium hydroxide is added in excess to the solution of potash alum, we obtain:

A
A white precipitate
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B
Bluish white precipitate
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C
A clear solution
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D
A crystalline mass
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Solution

The correct option is C A clear solution
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Q. Assertion :Ammonium hydroxide solution is added to zinc nitrate solution slowly and then in excess we see white precipitates are soluble Reason: Ammonium hydroxide solution is added to zinc nitrate solution slowly white precipitates of ammonium nitrate is formed and when ammonium hydroxide is added in excess then the white precipitates are soluble in it
Q. Which of the following ions in solution would form a white precipitate that is soluble in excess sodium hydroxide solution is added to it ?
Q. (a) Sodium hydroxide solution is added to solution A. A white precipitate is formed which is insoluble in excess sodium hydroxide solution. Name the metal ion present in solution A.
(b) When ammonium hydroxide is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide to give an inky blue solution. Name the cation present in solution B. What is the probable colour of solution B?
Q. When a solution of sodium hydroxided in excess to the solution of postah alum, we get :
Q. The following table shows the test a student performed on four different aqueous solution which are X, Y, Z and W. Based on the observations provided, identify the action present.
Chemical testObservationConclusion
To solution X, ammonium hydroxide is added in minimum quantity first and then in excess.A dirty white precipitate is formed which dissolves in excess to form a clear solution.
To solution Y ammonium hydroxide is added in minimum quantity first and then in excess.A pale blue precipitate is formed which dissolves in excess to form a clear inky blue solution.
To solution W a small quantity of sodium hydroxide solution hydroxide solution is added and then in excess.A white precipitate is formed which remains insoluble.
To a salt Z calcium hydroxide solution is added and then heated. A pungent smelling gas turning moist red litmus paper blue is obtained.
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