JEE Main Isolation of Elements Practice Questions With Solutions

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JEE Main Isolation of Elements Practice Questions with Solutions

The JEE Main Isolation of Elements Practice Test is an essential resource for all JEE Main aspirants to learn about the main concepts of different biomolecules and improve their knowledge of this chapter. The JEE Main Isolation of Elements Practice Questions with Solutions have a variety of questions from this chapter for students to practice and strengthen the chemistry section for the JEE Main entrance test. This chapter involves the study of obtaining different metals from their source.

You can expect about 2 to 3 questions from the Isolation of Elements chapter on the JEE Main question paper. Usually, the question will be in the form of multiple choice as well as integer types, testing your knowledge of metals and their isolation process. It is essential for candidates to attempt these practice tests at least once a week to develop knowledge and precision of the topic.

Around 15 to 20 questions are available from this chapter in the JEE Main Isolation of Elements Practice Questions with Solutions, covering all the essential topics. The important topics of this chapter include General Principles of Metallurgy, Extraction & Reduction Methods, Refining Processes, Concentration Techniques, Ellingham Diagrams, Important Metallurgical Reactions, Alloys & Industrial Applications, and Environmental and Practical Aspects. The practice tests, containing questions on all these topics along with their detailed solutions, will allow aspirants to understand the basic concepts well by going through the detailed explanations provided.

Isolation of Elements is a scoring topic from the chemistry section in the exam. So, thoroughly practising the JEE Main Isolation of Elements Practice Questions with Solutions on a regular basis will help students to improve their accuracy and manage their time better during the examination. It will also allow them to understand their weak areas, work on them, and gain confidence in solving questions from this topic with ease in the JEE Main exam.

JEE Main Chemistry Isolation of Elements Practice Questions

Mathematics Physics

Question 1.

Which one of the following is not an example of calcination?

{CaCO}_{3} \cdot {MgCO}_{3} \overset{Δ}{⟶} CaO + MgO + 2 {CO}_{2}

2 PbS + 3 O_{2} \overset{Δ}{⟶} 2 PbO + 2 {SO}_{2}

{CaCO}_{3} \overset{Δ}{⟶} CaO + {CO}_{2}

{Fe}_{2} O_{3} \cdot {xH}_{2} O \overset{Δ}{⟶} {Fe}_{2} O_{3} + {xH}_{2} O

Question 2.

Given below are two statements related to Ellingham diagram:

Statement I : Ellingham diagrams can be constructed for formation of oxides, sulfides and halides of metals.

Statement II : It consists of plots of $Δ_{f} H^{0}$ vs $T$ for formation of oxides of elements.

In the light of the above statements, choose the most appropriate answer from the options given below:

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Statement I is incorrect but Statement II is correct

Question 3.

Which one of the following is most likely a mismatch ?

Titanium - van Arkel Method

Zinc - Liquation

Nickel - Mond process

Copper - Electrolysis

Question 4.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : In the Ellingham diagram, a sharp change in slope of the line is observed for $Mg \to MgO$ at $\sim 1120^{\circ} C$

Reason R: There is a large change of entropy associated with the change of state

In the light of the above statements, choose the correct answer from the options given below

Both

A

and

R

are true and

R

is the correct explanation of

A

A

is false but

R

is true

Both

A

and

R

are true but

R

is NOT the correct explanation of

A

A

is true but

R

is false

Question 5.

Given below are two statements :

Statement I : In the metallurgy process, sulphide ore is converted to oxide before reduction.

Statement II : Oxide ores in general are easier to reduce.

In the light of the above statements, choose the most appropriate answer from the options given below:

Both Statement I and Statement II are correct

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Statement I is incorrect but Statement II is correct

Question 6.

In the extraction process of copper, the product obtained after carrying out the reactions

(i) $2 {Cu}_{2} S + 3 O_{2} \to 2 {Cu}_{2} O + 2 {SO}_{2}$

(ii) $2 {Cu}_{2} O + {Cu}_{2} S \to 6 Cu + {SO}_{2}$ is called

Copper matte

Blister copper

Reduced copper

Copper scrap

Question 7.

Gibbs energy vs T plot for the formation of oxides is given below.

JEE Main 2023 (Online) 10th April Evening Shift Chemistry - Isolation of Elements Question 5 English

For the given diagram, the correct statement is -

600^{\circ} C, C

can reduce

FeO

600^{\circ} C, C

can reduce

ZnO

600^{\circ} C, CO

can reduce

ZnO

600^{\circ} C, CO

cannot reduce

FeO

Question 8.

Which of the following is used as a stabilizer during the concentration of sulphide ores?

Cresols

Xanthates

Fatty acids

Pine oils

Question 9.

In Hall - Heroult process, the following is used for reducing ${Al}_{2} O_{3}$ :-

Magnesium

{CaF}_{2}

Graphite

{Na}_{3} {AlF}_{6}

Question 10.

Which of the following metals can be extracted through alkali leaching technique?

Sn

Au

Pb

Question 1.

The setting time of Cement is increased by adding :

Gypsum

Limestone

Clay

Silica

Question 2.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: In an Ellingham diagram, the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature.

Reason R: CO tends to get decomposed at higher temperature.

In the light of the above statements, choose the correct answer from the options given below

A is correct but R is not correct

Both A and R are correct but R is NOT the correct explanation of A

A is not correct but R is correct

Both A and R are correct and R is the correct explanation of A

Question 3.

Which one of the following statements is incorrect?

Cast iron is obtained by melting pig iron with scrap iron and coke using hot air blast.

The malleable iron is prepared from cast iron by oxidising impurities in a reverberatory furnace.

van Arkel method is used to purify tungsten.

Boron and Indium can be purified by zone refining method.

Question 4.

The methods NOT involved in concentration of ore are

A. Liquation

B. Leaching

C. Electrolysis

D. Hydraulic washing

E. Froth floatation

Choose the correct answer from the options given below :

A and C only

C, D and E only

B, D and C only

B, D and E only

Question 5.

Given below are two statements:

Statement I: During Electrolytic refining, the pure metal is made to act as anode and its impure metallic form is used as cathode.

Statement II: During the Hall-Heroult electrolysis process, purified

{Al}_{2} O_{3}

is mixed with

{Na}_{3} {AlF}_{6}

to lower the melting point of the mixture.

In the light of the above statements, choose the most appropriate answer from the options given below:

Statement

I

is correct but Statement II is incorrect

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are incorrect

Both Statement I and Statement II are correct

Question 6.

In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

remove

FeO

{FeSiO}_{3}

remove calcium as

{CaSiO}_{3}

decrease the temperature needed for roasting of

{Cu}_{2} S

separate

CuO

{CuSiO}_{3}

Question 7.

The major component of which of the following ore is sulphide based mineral?

Sphalerite

Siderite

Malachite

Calamine

Question 8.

The reaction representing the Mond process for metal refining is _________.

ZnO + C \overset{Δ}{⟶} Zn + CO

2 K [Au (CN)_{2}] + Zn \overset{Δ}{⟶} K_{2} [Zn (CN)_{4}] + 2 Au

Zr + 2 I_{2} \overset{Δ}{⟶} {ZrI}_{4}

Ni + 4 CO \overset{Δ}{⟶} Ni (CO)_{4}

Question 9.

Given below are two statements :

Statement I : In froth floatation method of rotating paddle agitates the mixture to drive air out of it.

Statement II : Iron pyrites and generally avoided for extraction of iron due to environmental reasons.

In the light of the above statements, choose the correct answer from the options given below :

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Question 10.

Which one of the following reactions does not occur during extraction of copper?

2 FeS + 3 O_{2} \to 2 FeO + 2 S O_{2}

FeO + Si O_{2} \to FeSi O_{3}

CaO + Si O_{2} \to CaSi O_{3}

2 C u_{2} s + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2}

JEE Main Isolation of Elements Practice Questions With Solutions

JEE Main Isolation of Elements Practice Questions with Solutions

JEE Main Chemistry Isolation of Elements Practice Questions

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

Question 8.

Question 9.

Question 10.

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

Question 8.

Question 9.

Question 10.

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