Chemistry
Identify the substances underlined :
(i) The catalyst used to oxidise ammonia.
(ii) The organic compound which when solidified, forms an ice like mass.
(iii) The dilute acid which is an oxidizing agent.
Ammonia
ICSE 2019
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Answer
(i) Platinum
(ii) Glacial acetic acid
(iii) Nitric acid
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Answer the following questions based on the extraction of aluminium from alumina by Hall- Heroult's Process.
(i) What is the function of cryolite used along with alumina as the electrolyte.
(ii) Why is the powdered coke sprinkled on top of the electrolyte.
(iii) Name the electrode from which aluminium is collected.
Match the alloys given in column I with the uses given in column II
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2NaOH + CuSO4 ⟶ Na2SO4 + Cu(OH)2↓
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(ii) What is the colour of the precipitate formed.
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[C = 12, H = 1, N = 14]