JEE Advanced 2021 Paper 1 Online | Isolation of Elements Question 5 | Chemistry

JEE Advanced 2021 Paper 1 Online

MCQ (More than One Correct Answer)

-2

A mixture of two salts is used to prepare a solution S, which gives the following results :

JEE Advanced 2021 Paper 1 Online Chemistry - Isolation of Elements Question 10 English

JEE Advanced 2021 Paper 1 Online Chemistry - Isolation of Elements Question 10 English

The correct option(s) for the salt mixture is (are)

Pb(NO₃)₂ and Zn(NO₃)₂

Pb(NO₃)₂ and Bi(NO₃)₃

AgNO₃ and Bi(NO₃)₃

Pb(NO₃)₂ and Hg(NO₃)₂

JEE Advanced 2020 Paper 2 Offline

MCQ (More than One Correct Answer)

-2

Which among the following statement(s) is/are true for the extraction of aluminium from bauxite?

Hydrated Al₂O₃ precipitates, when CO₂ is bubbled through a solution of sodium aluminate.

Addition of Na₃AlF₆ lowers the melting point of alumina.

CO₂ is evolved at the anode during electrolysis.

The cathode is a steel vessel with a lining or carbon.

JEE Advanced 2019 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

The cyanide process of gold extraction involves leaching out gold from its ore with CN^$$-$$ in the presence of Q in water to form R. Subsequently, R is treated with T to obtain Au and Z. Choose the correct option(s).

Q is O₂

Z is [Zn(CN)₄]^2$$-$$

T is Zn

R is [Au(CN)₄]^$$-$$

JEE Advanced 2016 Paper 2 Offline

MCQ (More than One Correct Answer)

-2

Extraction of copper from copper pyrite (CuFeS₂) involves

crushing followed by concentration of the ore by froth flotation

removal of iron as slag

self-reduction step to produce ‘blister copper’ following evolution of SO₂

refining of ‘blister copper’ by carbon reduction

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