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IMPORTANT
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Match the following Chemicals and their formulae:
(1) Gypsum                : CaSO4.2H2O
(2) Epsom salt            : MgSO4
(3) Borax                    : NaHC03
(4) Laughing Gas       : NO2
Which or the following pair given above is/are correctly matched?

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Important Questions on Introduction to Matter

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General Science & Technology>Chapter 13 - Introduction to Matter>Self-Evaluation Test>Q 3

Which of the following is/are homogenous mixtures?
1. Moist air
2. Brine
3. Muddy water
4. Gunpowder

Select the correct answer using the codes given below:

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General Science & Technology>Chapter 13 - Introduction to Matter>Self-Evaluation Test>Q 4
Which of the following pairs of alloys and their components are correct?
1. Nichrome - Nickel, Chromium and Iron
2. Bronze - Copper and Zinc
3. Rolled gold - Copper and Aluminium
Select the correct answer using the codes given below:
 
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IMPORTANT
General Science & Technology>Chapter 13 - Introduction to Matter>Self-Evaluation Test>Q 5
Which of the following method is used for separation and identification of the substances?
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IMPORTANT
General Science & Technology>Chapter 13 - Introduction to Matter>Previously Asked Questions>Q 1

Which of the following is/are the example/examples of chemical changes?

1. Crystallisation of sodium chloride
2. Melting of ice
3. Souring of milk

Select the correct answer using the code given below: