ICSE Class 10 Answered
(a)(i) Name the compound of Lead present in Galena.(ii) Name the gas obtained when above named Lead compound is roasted. (b) Define: (i) Ore (ii) Gangue(c) Name the process how(i) Aluminium ore is purified(two methods)?(ii) Molten alumina is reduced?(iii) Impure aluminium is purified?(d) Name the alloy used for making: (i) Statues(ii) Bodies of aircraft
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 and Hall's process.
(ii) Hall's process
(iii) Hoope's process
(d) (i) Brass
(ii)Duralumin
(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 and Hall's process.
(ii) Hall's process
(iii) Hoope's process
(d) (i) Brass
(ii)Duralumin
Answered by | 04 Jun, 2014, 03:23: PM
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