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.
Related Questions
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
Column I Column II (i) Duralumin A: Electrical fuse (ii) Solder B: Surgical instruments (iii) Brass C: Aircraft body (iv) Stainless steel D: Decorative articles Copper sulphate solution reacts with sodium hydroxide solution to form a precipitate of copper hydroxide according to the equation:
2NaOH + CuSO4 ⟶ Na2SO4 + Cu(OH)2↓
(i) What mass of copper hydroxide is precipitated by using 200 g of sodium hydroxide.
[H = 1, O = 16, Na = 23, S = 32, Cu = 64]
(ii) What is the colour of the precipitate formed.
Find the empirical and molecular formula of an organic compound from the data given: C = 75.92%, H = 6.32% and N = 17.76%. The vapour density of the compound is 39.5
[C = 12, H = 1, N = 14]