General Principles and Processes of Isolation of Elements (OLD NCERT) Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

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Chemistry
General Principles and Processes of Isolation of Elements (OLD NCERT)

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High purity copper metal is obtained by:

1. Carbon reduction

2. Hydrogen reduction

3. Electrolytic reduction

4. Thermite process

Q1:

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Subtopic: Intro - Flux, Leaching, Roasting & Calcination |

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Aluminothermic process is used for the extraction of metals, whose oxides are:

1. fusible

2. not easily reduced by carbon

3. not easily reduced by hydrogen

4. strongly basic

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Purest form of iron is:

1. cast iron

2. hard steel

3. stainless steel

4. wrought iron

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Thomas slag is:

1. calcium silicate

2. calcium phosphate

3. tricalcium phosphate and calcium silicate

4. calcium ammonium phosphate

Q4:

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Corundum is:

1. SrO₂

2. Al₂O₃

3. CaCl₂

4. Cu₂Cl₂

Q5:

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Heating of carbonate ores to remove carbon is called as:

1. Roasting

2. Calcination

3. Smelting

4. Fluxing

Q6:

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Sulphide ores are common for the metals:

1. Ag, Cu and Pb

2. Ag, Cu and Sn

3. Ag, Mg and Pb

4. Al, Cu and Pb

Q7:

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Which element occurs freely in nature?

1. Iodine

2. Sulphur

3. Phosphorus

4. Magnesium

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Silver obtained by argentiferrous lead is purified by:

1. distillation

2. froth floatation

3. cupellation

4. reacting with KCN

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Which process is not used in purification of bauxite?

1. Hall's method

2. Baeyer's method

3. Serpek's method

4. Frankland's method

Q10:

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