JEE Main 2019 (Online) 9th January Evening Slot | Isolation of Elements Question 99 | Chemistry

The correct statement regarding the given Ellingham diagram is :

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Isolation of Elements Question 99 English

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Isolation of Elements Question 99 English

At 1400^oC, Al can be used for the extraction of Zn from ZnO

At 500^oC, coke can be used for the extraction of Zn from ZnO

Coke cannot be used for the extraction of Cu from Cu₂O.

At 800^oC, Cu can be used for the extraction of Zn from ZnO.

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

The ore that contains both iron and copper is :

Copper Pyrites

Malachite

Dolomite

Azurite

JEE Main 2018 (Online) 16th April Morning Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

In the extraction of copper from its sulphate ore, metal is finally obtained by the oxidation of cuprous sulphide with :

Fe₂O₃

Cu₂O

SO₂

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO₂ gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are :

NaAlO₂ and Al₂(CO₃)₃.x H₂O

A(OH)₃ and Al₂O₃.x H₂O

Na[Al(OH)₄] and Al₂O₃.x H₂O

Na[Al(OH)₄] and Al₂(CO₃)₃.x H₂O

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