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प्रश्न
Write the observation, and balanced equation for the following reaction:
Moist starch iodide paper is placed at the mouth of a test tube containing chlorine gas.
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उत्तर
Starch paper turns blue black :
\[\ce{2KI + Cl2 -> 2KCI + I2}\]
I2 reacts with starch to give blue black colour.
The chlorine liberates iodine from KI and then it is decolourised.
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संबंधित प्रश्न
Write the probable colour of the following salt:
Cupric salts
Write the probable colour of the following salt:
Aluminium Salts
Name the probable cation present in each of the following solution:
Yellow coloured solution
Name the probable cation present in each of the following solution:
Pink coloured solution
One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state 'no visible reaction'.
Calcium nitrate solution and zinc nitrate solution.
Write balanced equation for the following reaction:
Chlorine and cold dilute sodium hydroxide solution.
State what do you observe when:
Lead nitrate and sodium chloride are mixed.
The questions (i) to (v) refer to the following salt solutions listed A to F:
- Copper nitrate
- Iron (II) sulphate
- Iron (III) chloride
- Lead nitrate
- Magnesium sulphate
- Zinc chloride
- Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
- Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?
- Which solution will give a white precipitate, when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
- Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it ?
- Which solution gives a white precipitate with excess ammonium hydroxide solution?
Name :
a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
A metal which produces hydrogen on reacting with alkali as well as with acid.
