हिंदी

Write the Observation, and Balanced Equation for the Following Reaction:

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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.

योग
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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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अध्याय 4: Analytical Chemistry - Exercise 4 [पृष्ठ ८८]

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फ्रैंक Chemistry Part 2 [English] Class 10 ICSE
अध्याय 4 Analytical Chemistry
Exercise 4 | Q 5.4 | पृष्ठ ८८

संबंधित प्रश्न

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Write the probable colour of the following salt:

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Light blue coloured solution


Write the colour of the following salt : Cupric salts.


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'.


The questions (i) to (v) refer to the following salt solutions listed A to F:

  1. Copper nitrate
  2. Iron (II) sulphate
  3. Iron (III) chloride
  4. Lead nitrate
  5. Magnesium sulphate
  6. Zinc chloride
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  2. Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?
  3. Which solution will give a white precipitate, when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
  4. Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it ?
  5. Which solution gives a white precipitate with excess ammonium hydroxide solution?

Colour of an aqueous solution of copper sulphate is ______.


Colour of the precipitate formed on adding NaOH solution to iron (II) sulphate solution is ______.


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