Name the black powdery substance used for the reduction of zinc oxide during its extraction.

Choose from the following list of substances, as to what matches the description given below : [Acetylene gas, aqua fortis, coke, brass, barium chloride, bronze, platinum] A gaseous hydrocarbon commonly used for welding purposes An aqueous salt solution used for testing sulphate radical. A black, powdery substance used for the reduction of zinc oxide during its extraction. A catalyst used in the manufacture of nitric acid by Ostwald's process. The substance is an alloy of zinc, copper and tin.

Choose from the following list of substances, as to what matches the description given below: [Acetylene gas, aqua fortis, coke, brass, barium chloride, bronze, platinum). (i) A black powdery substance used for the reduction of zinc oxide during its extraction. (ii) The substance is an alloy of zinc, copper and tin.

Name the substance used for drying ammonia.

Name the process used for the concentration of zinc blende.

Reducing agent used for reduction of copper oxide in blast furnace is:-

self reduction process cannot be used for the extraction of

Electrolytic reduction method is used for the extraction of

Electrolytic reduction method is used fro the extraction of

(ii) Carbon reduction is used for the extraction of :

Auto-reduction process is used for the extraction of :