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प्रश्न
What do you understand by the following:
Qualitative analysis
उत्तर
The analysis which involves the identification of the unknown substances in a given sample is called qualitative analysis.
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संबंधित प्रश्न
Name:
a compound containing zinc in the anion
You are provided with two reagent bottles marked A and B. One of which contains NH4OH solution and the other contains NaOH solution. How will you identify them by a chemical test?
Z is a compound. With dilute HCl it gives a gas turning dichromatic solution green. Z gives lilac flame. Name Z.
Identify the substance P based on the information given below:
The deliquescent salt P, turns yellow on dissolving in water, and gives a reddish brown precipitate with sodium hydroxide solution.
Fill in the blank.
Potassium sulphite on reacting with hydrochloric acid releases ________
Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solution of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy of the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).
|
Aqueous salt solution |
Colour of the precipitate when NaOH is added in small quantity |
Nature of the(soluble or insoluble) when NaOH is added in excess |
|
copper (II) sulphate zinc nitrate lead nitrate calcium chloride Iron (III) sulphate |
(i) (ii) (iii) (iv) (v) |
(vi) (vii) (viii) (ix) (x) |
Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Write balanced equation :
Copper sulphate solution with ammonium hydroxide solution.
Write balanced equations for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
