MEDIUM
Earn 100

Complete the following sentence:

A mixture is _____.

Important Questions on Is Matter around Us Pure?

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Which one of the following alloy does not contain copper?
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If 110 g of salt is present 550 g of the solution then the concentration of the solution will be:
EASY
The alloy nichrome contains
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A solution is prepared by dissolving 60 g of sugar in 480 g of water. Concentration in terms of mass by a mass percentage of the solution is:
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Take 30g of common salt and dissolve it 70g of water, Find the concentration of the solution in terms of weight percent.
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Which of the following statement is true about the solubility of a substance?
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What is the mass of oxygen required to react completely with 15 g of H2 gas to form water:
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Gas used for precipitation of pure common salt (NaCl) from saturated solution of common salt is 
EASY

Name an alloy of lead and tin.

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What is heat treatment of steel? Explain.
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What are alloys? Give two examples. 
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Give one word for the following statement:

  • The substance prepared by adding other metals to a base metal in appropriate proportions to obtain certain desirable properties.
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Which one of the following is not a homogeneous mixture?
HARD
List the points of differences between homogeneous and heterogeneous mixtures.
EASY
In a mixture containing sugar and sand, the constituent(s) is/are _____.
   
HARD
Why is kerosene considered a mixture? 
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Explain why coal is regarded as a mixture and not a pure substance.
EASY
Brass is a mixture of two elements copper and tin.
EASY
All mixtures are homogeneous in nature.