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Physical Chemistry
Some Basic Concepts of Chemistry
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Structure of Atom
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Redox Reactions
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Chemical Equilibrium
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Inorganic Chemistry
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Isolation of Elements
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d and f Block Elements
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Coordination Compounds
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Salt Analysis
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Environmental Chemistry
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Organic Chemistry
Basics of Organic Chemistry
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Hydrocarbons
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Haloalkanes and Haloarenes
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Alcohols, Phenols and Ethers
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Aldehydes, Ketones and Carboxylic Acids
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Compounds Containing Nitrogen
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Polymers
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Biomolecules
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Chemistry in Everyday Life
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Practical Organic Chemistry
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1
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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

A
$$\mathrm{ZnO+C\buildrel \Delta \over \longrightarrow Zn+CO}$$
B
$$\mathrm{2K[Au(CN)_2]+Zn\buildrel \Delta \over \longrightarrow K_2[Zn(CN)_4]+2Au}$$
C
$$\mathrm{Zr+2I_2 \buildrel \Delta \over \longrightarrow ZrI_4}$$
D
$$\mathrm{Ni+4CO\buildrel \Delta \over \longrightarrow Ni(CO)_4}$$
2
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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 :

A
Statement I is true but Statement II is false
B
Statement I is false but Statement II is true
C
Both Statement I and Statement II are true
D
Both Statement I and Statement II are false
3
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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

A
$$\mathrm{2FeS + 3{O_2} \to 2FeO + 2S{O_2}}$$
B
$$\mathrm{FeO + Si{O_2} \to FeSi{O_3}}$$
C
$$\mathrm{CaO + Si{O_2} \to CaSi{O_3}}$$
D
$$\mathrm{2C{u_2}s + 3{O_2} \to 2C{u_2}O + 2S{O_2}}$$
4
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

The metal which is extracted by oxidation and subsequent reduction from its ore is :

A
Al
B
Cu
C
Ag
D
Fe
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