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1.	Match the following choosing one item from Column X the appropriate item from Column Y. `{:("Column X","Column Y"),(a."Al",p. "Calamine"),(B."Cu",q. "Cryolite"),(C."Mg",r. "Malachite"),(D. "Zn",s."Carnalite"):}`
Answer» Correct Answer - `Ararrq;Brarrr;Crarrs;Drarrp`

2.	The coordination number of `Al` in the crystalline state of `AlCl_(3)` is _____.
Answer» Correct Answer - `(6)`

3.	Iron is rendered passive by treatment with concentratedA. `H_(2)SO_(4)`B. `H_(3)PO_(4)`C. HClD. `HNO_(3)`
Answer» Correct Answer - D

4.	Upon hetaing with `Cu_(2)S` the regants that give copper metel are (i) `CuFeS_(2)` (ii) `CuO` (iii) `Cu_(2)O`(iv) `CuSO_(4)`A. `CuFeS_(2)`B. CuOC. `Cu_(2)O`D. `CuSO_(4)`
Answer» Correct Answer - B::C::D

5.	In the electrolysis of alumina, cryolite is added toA. lower the melting point of aluminaB. increase the electrical conductivityC. minimise the anode effectD. remove impurities from alumina
Answer» Correct Answer - A::B

6.	Out of the following matals that cannot be obtained by electrolysis of the aquenous solution of their salts isA. AgB. MgC. CuD. Al
Answer» Correct Answer - B::D

7.	Match the conversions in Column I with the type(s) of reaction(s) given in Column II. `{:("Column I","ColumnII"),(A. "PbS"rarr"PbO",p. "Roasting"),(B. "CaCo"_(3)rarr"CaO",q. "Calcination"),(C. "ZnS"rarr"Zn",r. "Carbon reduction"),(D. "Cu"_(2)"S"rarr"Cu",s. "Self-reduction"):}`
Answer» Correct Answer - `Ararrp;Brarrq;Crarrr,s;Drarrp,s`

8.	Copper is the most noble of first row transition metals and occurs in small deposits in serveral countries. Ores of copper include chalcanthite `(CuSO_(4).5H_(2)O)`, atacanite `[Cu_(2)Cl(OH)_(3)]`, cuprite `(Cu_(2)O)`, copper glance `(Cu_(2)S)`, and malachite `[Cu_(2)(OH)_(2)CO_(3)]`. However, `80 %` of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. Partial roasting of chalcopyrite producesA. `Cu_(2)S` and FeOB. `Cu_(2)O` and FeOC. CuS and `Fe_(2)O_(3)`D. `Cu_(2)O` and `Fe_(2)O_(3)`
Answer» Correct Answer - B

9.	Match list I with list II and select the correct answer using the codes given below the lists. `{:("List I (Ore)","List II (Metal)"),("(i) Dolomite","(ii) Copper"),("(ii) Chalcopyrite","(ii) Lead"),("(iii) Pyrolusite", "(iii) Magnesium"),("(iv) Galena", "(iv) Manganese"):}`A. `{:("(i) (ii) (iii) (iv)"),("III I IV II"):}`B. `{:("(i) (ii) (iii) (iv)"),("III II I IV"):}`C. `{:("(i) (ii) (iii) (iv)"),("I II III IV"):}`D. `{:("(i) (ii) (iii) (iv)"),("IV III II I"):}`
Answer» Correct Answer - A

10.	The chemical composition of slag formed during the smelting process in the extraction of copper isA. `Cu_(2)O+FeS`B. FeSi`O_(3)`C. CuFe`S_(2)`D. `Cu_(2)S` + FeO
Answer» Correct Answer - B

11.	Following two question have assertion followed by the reason. Answer them according to the following options. Assertion In smelting process, the roasted ore is heated with powdered coke in presence of flux. Reason Oxides are reduced to metal by carbon or CO and impurities are removed as slag.A. Both assertion and reason are correct and reason is the correct explanation of the assertion.B. Both assertion and reason are correct but reason is not the correct explanation of assertion.C. Assertion is correct but reason is incorrect.D. Assertion is incorrect but reason is correct.
Answer» Correct Answer - A

12.	Assertion (A): Magnesium can be obtained by the electronlysis of aqueous solution of `MgCl_(2)`. Reason (R ): The electrode potential of `Mg^(2+)` is much higher than `H^(o+)`.A. Both assertion and reason are correct and reason is the correct explanation of the assertion.B. Both assertion and reason are correct but reason is not the correct explanation of assertion.C. Assertion is correct but reason is incorrect.D. Assertion is incorrect but reason is correct.
Answer» Correct Answer - D

13.	Carbon reduction method is commercially employed for commercial extraction ofA. heamatiteB. cassiteriteC. iron pyriteD. corundum
Answer» Correct Answer - A::B

14.	Amphoteric oxides is/areA. `Al_(2)O_(3)`B. SnOC. ZnOD. `Fe_(2)O_(3)`
Answer» Correct Answer - A::B::C

15.	Which is used in paint?A. PbOB. `Pb_(3)O_(4)`C. PbCr`O_(4)`D. `PbCl_(2)`
Answer» Correct Answer - A::B::C

16.	In the commercial electrochemical process for aluminium extraction, the electrolyte used isA. `Al(OH)_(3)` in NaOH solutionB. an aqueous solution of `Al_(2)(SO_(4))_(3)`C. a molten mixture of `Al_(2)O_(3)` and `Na_(3)AlF_(6)`D. a molten mixture of `AlO(OH)` and `Al(OH)_(3)`
Answer» Correct Answer - C

17.	Hydrogen gas will not reduce:A. heated cupric oxideB. heated ferric oxideC. heated stannic oxideD. heated aluminium oxide
Answer» Correct Answer - D

18.	The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction of `Al_(2)O_(3)` dissolved on fused cryolite in fused cryolite isA. as a catalystB. to make the fused mixture very conductingC. to increase the temperature of the meltD. to decrease the rate of oxidation of carbon at the anode`
Answer» Correct Answer - B