Chemistry Of Lighter Metals QUESTIONS AND ANSWERS

IIT JEE : Chemistry Of Lighter Metals QUESTIONS AND ANSWERS :: part1 : 21 to 25

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

21.The impurities associated with the ore after mining are collectively called

flux

slag

minerals

gangue.

22.Which of the following statements is correct regarding the slag obtained during the extraction of a metal like copper or iron?

The slag is lighter and has lower melting point than the metal

The slag is heavier and has lower melting point than the metal

The slag is lighter and has higher melting point than the metal

The slag is heavier and has higher melting point than the metal.

23.Which of the following statements is correct?

All ores are minerals

All minerals are ores

Calcination is generally carried out in blast furnace

Oxide ores are concentrated by froth floatation process.

24.In which of the following minerals, aluminium is not present?

Cryolite

Mica

Feldspar

Fluorspar.

25.Sodium hydroxide solution reacts with phosphorus to give phosphine. To bring about this reaction we need

White phosphorus and dil. NaOH

White phosphorus and conc. NaOH

Red phosphorus and dil. NaOH

Red phosphorus and conc. NaOH.

More Chemistry Of Lighter Metals QUESTIONS AND ANSWERS available in next pages

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