Test: Level - 2 MET - 1


20 Questions MCQ Test Chemistry Class 12 | Test: Level - 2 MET - 1


Description
This mock test of Test: Level - 2 MET - 1 for Class 12 helps you for every Class 12 entrance exam. This contains 20 Multiple Choice Questions for Class 12 Test: Level - 2 MET - 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Level - 2 MET - 1 quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: Level - 2 MET - 1 exercise for a better result in the exam. You can find other Test: Level - 2 MET - 1 extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

Which of the following statements is incorrect?

Solution:

Statement  : Zinc blende and iron pyrites are sulphides. This statement is correct because zinc blende is ZnS and iron pyrites is FeS2. Statement  : Calamine and siderite are carbonates. This statement is correct because calamine is ZnCO3 and siderite is FeCO3. Statement  : Malachite and azurite are ores of copper. This statement is also correct because malachite is Cu(OH)2.CuCO3 and azurite isCu(OH)2.2CuCO3. Statement  : Argentite and cuprite are oxides. This statement is incorrect because argentite is Ag2S and cuprite is Cu2O.

QUESTION: 2

Match the column (I) and (II) and select the correct answer using the codes given below.

Solution:

QUESTION: 3

Select the correct statement.

Solution:

(A),(B) and (C) stat4ements are correct.

QUESTION: 4

NaCN is sometimes added in the froth floatation process as a depressant when mineral contains ZnS and PbS because,

Solution:

QUESTION: 5

Which does not represent correct method?

Solution:

This process is si,ply calcination.

QUESTION: 6

Main source of lead is galena (PbS). It is converted to Pb by :

(A) :

(B) 

Solution:

PbS reduces PbO to Pb and SO2 is  liberaated. This is called as self reduction.

QUESTION: 7

For which of the following metals Bessemerisation process is important?

I : Fe, II : Cu, III : Al, IV : Silver :

Solution:

I = In manufacture os steel, II + Self reductio of Cu2O to Cu O to Cu vby CuS

QUESTION: 8

The chemical processes in the production of steel from haematite ore involve:

Solution:

Firstly, carbon which is added along which crushed haematite ore is oxidised to CO(andCO2) and second the produced CO acts as chief reducing agent for the reduction of haematite to steel.

QUESTION: 9

The chemical composition of 'slag' formed during the smelting process in the extraction of copper is 

Solution:

QUESTION: 10

Which of the following statement is incorrect about the extractive metallurgy of copper?

Solution:

QUESTION: 11

Pb and Sn are extracted from their chief ore by:

Solution:

QUESTION: 12

Which of the following statements is incorrect?

Solution:

QUESTION: 13

Which of the following process is used in the extractive metallurgy of magnesium?

Solution:

QUESTION: 14

White bauxite is purified by :

Solution:

White bauxite containing the impurity of silica only in removed by heating with coke in atmosphere of nitrogen.

QUESTION: 15

Which of the following statements is correct?

Solution:

QUESTION: 16

Statement-1 : The reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction.
Statement-2 : The value of entropy change +S of the reduction process is more on +ve side when the metal formed is in liquid state and the metal oxide being reduced is in solid state. Thus the value of +Go becomes more on negative side.

Solution:

Randomness increases on changing the phase from soilid to liqid or from liquid to gas

QUESTION: 17

Statement- 1: Extraction of gold from its native ore involves leaching the metal with dilute solution of NaCN in presence of air.
Statement-2 : This is an oxidation reaction and leads to the formation of a soluble comoplex.

Solution:

QUESTION: 18

Statement- 1: Silica is added as a flux in reverberatory furnace, in the extraction of copper from copper pyrites.
Statement-2 : Silica decreases the melting point of the ore and remove the impurity of lead sulphide as PbSiO3.

Solution:

QUESTION: 19

Statement- 1: Cast iron is different from pig iron.
Statement-2 : Cast iron is made by melting pig iron with scrap iron and coke using hot air blast and has about 3% carbon content.

Solution:

Cast iron contains 3% carbon.

QUESTION: 20

Statement- 1: In the Hoop’s process of aluminium purification, the fused materials remain in three different layers. These layers remain intact even in electrolytic reduction.
Statement-2 : This is an oxidation reaction and leads to the formation of a soluble complex.

Solution:

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