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Middle School: 6th, 7th and 8th Grade
Science
Mixtures 2
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Q.1
Alloys are mixtures of metals. Which is NOT an alloy?
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Brass
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Bronze
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Chromium
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Solder
Q.2
A pure substance has a melting point which is .......
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Higher than its freezing point
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Lower than its boiling point
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The same as its boiling point
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The same as its freezing point
Q.3
Air is a mixture of different gasses. Which list consists of gasses present in the air?
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Hydrogen, oxygen, carbon dioxide
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Nitrogen, hydrogen, carbon dioxide
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Nitrogen, oxygen, carbon dioxide
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Nitrogen, oxygen, hydrogen
Q.4
Which of these substances is a mixture?
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Oxygen
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Salt
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Sea water
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Water
Q.5
How would you separate a mixture of iron filings and sulfur?
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Filter
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Use a magnet
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Use a sieve
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Use tweezers
Q.6
The name given to the liquid which dissolves the solid in a solution is .......
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Distillate
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Saturated
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Soluble
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Solvent
Q.7
Which of the following is NOT a mixture?
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Coca cola
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Crude oil
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Methane
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Milk
Q.8
The best description of a mixture is .......
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A lot of substances jumbled together
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One substance on its own
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Two or more substances added together which can be easily separated
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Two or more substances chemically joined together
Q.9
In a solution, the hotter the solvent .......
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No more of the soluble solid dissolves
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The less the solute dissolves
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The quicker the soluble solid dissolves
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The slower the solute dissolves
Q.10
The method used to separate colored dyes in ink is .......
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Chromatography
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Distillation
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Evaporation
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Filtration
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