Chemistry
(a) Balance the chemical equation given below:
FeS2 + O2 ⟶ Fe2O3 + SO2
(b) Write balanced chemical equation for formation of ‘B’.
(c) Why is it necessary to convert ‘B’ to Oleum?
(d) Identify ‘C’.
(e) Write an equation for the reaction between Oleum and ‘C’.
Related Questions
An element X has an electronic configuration 2, 2. The compound formed when X combines with oxygen is most likely to be:
- a compound with a low melting point.
- a gas that dissolves in water to form an electrolyte.
- a good conductor in both solid and molten state.
- an ionic solid.
If an element has a low ionisation potential, it is most likely to be a:
- metal
- non-metal
- metalloid
- inert gas
Ammonium hydroxide solution is added to the solution containing the ions mentioned in List X. List Y gives the details of the precipitate. Match the ions with their coloured precipitates.
List X List Y (a) Zn2+ 1. No visible reaction (b) Fe2+ 2. White precipitate insoluble in excess (c) Pb2+ 3. Gelatinous white precipitate soluble in excess (d) Fe3+ 4. Blue precipitate soluble in excess (e) Ca2+ 5. Dirty green precipitate insoluble in excess 6. Reddish brown precipitate insoluble in excess Complete the following sentences by choosing the correct answer from the brackets:
(a) The metal to be refined is kept at the …………… during the process of electro-refining. [cathode / anode]
(b) Dilute HCl and dilute H2SO4 can be distinguished by adding …………… solution. [NaNO3 / BaCl2]
(c) Ammonia gas is collected by …………… displacement of air. [upward / downward]
(d) The gas formed when copper carbonate is heated is …………… [O2 / CO2]
(e) Excess ammonia reacts with chlorine to form …………… [nitrogen / nitrogen trichloride]