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Integer Answer Type Questions for JEE: General Principles & Process of Isolation of Metals | Chapter-wise Tests for JEE Main & Advanced PDF Download

Q.1. A mixture contains AgCl, Al(OH)3, Zn(OH)2, Cu(OH)2. On adding excess of NH4OH how many of them will transfer into filtrate?

Ans. 3
AgCl, Zn(OH)2, Cu(OH)2 will dissolve in excess of NH4OH.


Q.2. The number of water molecules attached with microcosmic salt is

Ans. 4
Na(NH4)HPO4 . 4H2O


Q.3. How many of the following ores are carbonate type?
Cuprite, Malachite, Siderite, Bauxite, Zincite, Calamine, Limonite, Azurite, Cerussite, Carnalite, Dolomite. 

Ans. 6
Cuprite: Cu2O, Malachite: CuCO3.Cu(OH)2 , Siderite: FeCO3, Bauxite: Al2O3.2H2O, Zincite: ZnO; Calamine: ZnCO3, Limonite: 2Fe2O3.3H2O. Azurite: 2CuCO3.Cu(OH)2, Cerussite: PbCO3, Carnalite: KCl.MgCl2.6H2O, Dolomite: CaCO3.MgCO3.


Q.4. Sea water contains 1297.3g of Mg2+ per metric ton . How much of slaked lime in kg. must be added to 1.0 metric ton of sea water to precipitate all of the Mg2+ ion.

Ans. 4
Mg2+ + Ca(OH)2 → Mg(OH)2 + Ca2+
24 g of Mg2+ is ppted ny 74g of Ca(OH)2
1297.3 g Mg2+ is ppted ny 74g Integer Answer Type Questions for JEE: General Principles & Process of Isolation of Metals | Chapter-wise Tests for JEE Main & Advanced
= 4000g
= 4 kg


Q.5. Ag2S + NaCN + Zn → Ag + ' W '
In ‘W’ the coordination number of Zn is –

Ans. 4
Because
Ag2S + NaCN + Zn → Ag + Na2 [Zn(CN)4]
Zn has 4 coordination number

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