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JEE Exam  >  JEE Tests  >  Test: Occurrence & Extraction (Old NCERT) - JEE MCQ

Test: Occurrence & Extraction (Old NCERT) - JEE MCQ


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10 Questions MCQ Test - Test: Occurrence & Extraction (Old NCERT)

Test: Occurrence & Extraction (Old NCERT) for JEE 2024 is part of JEE preparation. The Test: Occurrence & Extraction (Old NCERT) questions and answers have been prepared according to the JEE exam syllabus.The Test: Occurrence & Extraction (Old NCERT) MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Occurrence & Extraction (Old NCERT) below.
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Test: Occurrence & Extraction (Old NCERT) - Question 1
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Cryolite is the chief ore of

Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 1

The correct answer is Option A.
It was historically used as an ore of aluminium and later in the electrolytic processing of the aluminium-rich oxide ore bauxite (itself a combination of aluminium oxide minerals such as gibbsite, boehmite and diaspore).

Test: Occurrence & Extraction (Old NCERT) - Question 2
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 Composition of Siderite is

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Test: Occurrence & Extraction (Old NCERT) - Question 3
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Calamine is the ore of

Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 3

The correct answer is Option B.

Calamine is an ore of zinc. It is zinc carbonate ZnCO3.

Test: Occurrence & Extraction (Old NCERT) - Question 4
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Malachite is an ore of:
Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 4

The correct answer is Option A.
Malachite is a green copper carbonate hydroxide mineral with formula Cu2(CO3)(OH)2. It is of minor importance today as an ore of copper because it is usually found in small quantities and can be sold for higher prices for other types of use.

Test: Occurrence & Extraction (Old NCERT) - Question 5
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When a metal is to be extracted from its ore and if the gangue associated with the ore is silica ,then
Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 5

Correct Answer is option D
 
(Acidic Impurity) SiO2+ (Basic Flux) CaO→ (Slag) CaSiO3

Test: Occurrence & Extraction (Old NCERT) - Question 6
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 Roasting is done generally in case of the
Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 6

In this process sulphide ores are converted into oxide ores
2ZnS + 3O2 → 2ZnO + 2SO2

Test: Occurrence & Extraction (Old NCERT) - Question 7
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The metal always found in free state is
Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 7

The correct answer is Option C.

A native metal is any metal that is found in its metallic form, either pure or as an alloy, in nature.
For example, gold.
Gold exists as it is less reactive and does not form any kind of alloys in its natural state.

Test: Occurrence & Extraction (Old NCERT) - Question 8
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Bauxite is the chief ore of:
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The correct answer is option D
Aluminium
Bauxite is the most important ore of aluminium which contains only 30–54% alumina, Al2O3; the rest is a mixture of silica, various iron oxides, and titanium dioxide along with trace amounts of zinc, phosphorus, nickel, vanadium etc.
 

Test: Occurrence & Extraction (Old NCERT) - Question 9
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Dolomite is a mineral of
Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 9

The correct answer is Option D.
Dolomite : CaMg(CO3)2
It contains both calcium and magnesium.

Test: Occurrence & Extraction (Old NCERT) - Question 10
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Pyrolusite is a/an
Detailed Solution for Test: Occurrence & Extraction (Old NCERT) - Question 10

The answer is option B
Pyrolusite is MnO2. Thus, it is an oxide ore. It is a black, amorphous appearing mineral, often with a granular, fibrous or columnar structure, sometimes forming reniform crusts.

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