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ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

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Chemistry
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Write true or false

A heterogeneous mixture has a uniform composition throughout the mixture.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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The constituents of a mixture can only be separated by chemical means.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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What is the difference between a pure substance and a mixture ?

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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What are the different types of mixtures ?

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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The methods of separating components of a given mixture are based on the

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Explain the term mixture.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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What are the characteristic properties of a pure substance? Why do we need them?

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Define :- Miscible liquids

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Define :- Immiscible liquids

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Select the correct alternative from the choices given for the following statement:

Example of a homogeneous mixture is 

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Fill in the blank

Mixtures can be ________ or _______ 

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Define:

Periodic table

[4] Atomic Structure
Chapter: [4] Atomic Structure
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Give the group number of following elements present in periodic table

[4] Atomic Structure
Chapter: [4] Atomic Structure
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State the term

The tabular arrangement of elements in horizontal rows and vertical columns _________

[4] Atomic Structure
Chapter: [4] Atomic Structure
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The constituents of a mixture are present in a fixed ration.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Solutions are

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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State what information is provided by the formula of calcium hydroxide – Ca(OH)2

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Four atoms of hydrogen combine with one atom of carbon to give methane [CH4]. State the valency of carbon.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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Differentiate between a homogenous and a heterogeneous mixture with one example of each in the (a) solid-solid (b) solid-liquid If (c) liquid-liquid state of the mixture.

[3] Elements, Compounds and Mixtures (Experimental Techniques)
Chapter: [3] Elements, Compounds and Mixtures (Experimental Techniques)
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