write the balanced chemical equation for the following reaction and identify the type of reaction in each case. write the characteristic of the test for the following gases (a) CO2 (b) H2 pls sorry this chemistry
Answers
Answer:
The Characteristic test for (i) Carbon dioxide (CO2,) gas turns lime water milky when passed through it due to the formation of insoluble calcium carbonate.
Ca(OH)2 + CO₂
Limewater Carbon dioxide
CaCO3 + H₂O Calcium carbonate
(ii) Sulphur dioxide (SO2) gas when passed through acidic potassium permanganate solution (purple in colour) turns it colourless because SO2 is a strong reducing agent.
2KMnO4
Potassium Permanganate (purple)
5SO2 →>>
+ 2H₂O +
K₂SO4
Sulphur dioxide Potassium Sulphate (Colourless)
2MnSO4
Manganese Sulphate (Colourless)
+ 2H₂SO4
(iii) The evolution of oxygen (O₂) gas during a reaction can be confirmed by bringing a burning candle near the mouth of the test tube containing the reaction mixture. The intensity of the flame increases because oxygen supports burning.
(iv) Hydrogen (H₂) gas burns with a pop sound when a burning candle is brought near it.
Explanation:
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