ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Choose the most appropriate answer 

 A solvent of Iodine is

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A pure substance has definite.................. and constant ..............

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Use of a ................. to separate the components of a mixture of solids is based on the difference in the size of the components

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The constituents of a mixture are present in

1. a fixed ratio
2. a variable ratio,
3. the ratio of 2: 1
4. none of these

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Solutions are

1. heterogeneous mixtures.
2. compounds
3. homogeneous mixtures.
4. elements

 Fill in the blan

An ________ is a homogeneous mixture of two or more metals.

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Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.

Write true or false 

All pure substances have characteristic melting and boiling points.

 Write true or false 

A heterogeneous mixture has a uniform composition throughout the mixture

 Match the columns.

 Differentiate between the following.

Filter Paper and Alum

Is food that we eat a mixture ?

Name the technique that you use if only the solid component of a solution is required.

Name the substance you will add to speed up sedimentation.

What is the difference between a pure substance and a mixture ?

What are the different types of mixtures ?

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How many times is a proton heavier than an electron?

1. 1500
2. 1800
3. 1840
4. none of these

Fill in the blank

In the type of reaction called ....................................., ions two compounds exchange their positive and negative radicals ions respectively.

Explain the following type of chemical reaction, giving two examples for it:

Double displacement reaction

Give one example for the following types of mixtures :

solid-liquid heterogenous mixture.