ICSE Class 10 Answered
(a) (i) Name the compound of Lead present in Galena.(ii) Name the gas released when above named Lead compound is roasted. (b) Define:(i) Ore(ii) Gangue(c) Name the process by which:(i) Aluminium ore is purified (ii) Molten alumina is reduced(iii) Impure aluminium is purified
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) (i) Lead sulphide
(ii) Sulphur dioxide
(b) (i) Those minerals from which the metals are extracted commercially at a comparitively low cost and with minimum effort are called ores.
(ii) The earthly impurities including silica,mud, etc., associated with the ore are called gangue.
(c) (i) Baeyer's process
(ii) Hall's process
(iii) Hoope's process
(ii) Sulphur dioxide
(b) (i) Those minerals from which the metals are extracted commercially at a comparitively low cost and with minimum effort are called ores.
(ii) The earthly impurities including silica,mud, etc., associated with the ore are called gangue.
(c) (i) Baeyer's process
(ii) Hall's process
(iii) Hoope's process
Answered by | 04 Jun, 2014, 03:23: PM
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