Q2 of 14 Page 79

Find the gases for which the following statements are related.

Gas formed by the thermal decomposition of KMnO4

Oxygen (O2)

Potassium permanganate (KMnO4) is a strong oxidising agent and on heating gives potassium manganate (K2MnO4), manganese dioxide (MnO2) and oxygen.



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2

Find the gases for which the following statements are related.

Gas used for the purification of water

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Find the gases for which the following statements are related.

Gas interacting with the rhizobium bacteria in the soil

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Certain non-metals and their uses are given in the wrong order in the table below. Match them correctly.

 4

What are the chemicals used for the preparation of chlorine in the laboratory?