ICSE Class 10 Chemistry Question 22 of 42

Practical Chemistry — Question 23

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Question

Question 2(2014)

State your observation : When moist starch iodide paper is introduced into chlorine gas.

Answer

Chlorine gas turns moist starch iodide paper blue black.

Cl2 + 2KI ⟶ 2KCl + I2
[Starch + I2 ⟶ blue black colour]