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Matter and Its Composition

This document is a chemistry exam for Class VII (ICSE) focused on the topic of matter and its composition. It includes various sections such as fill-in-the-blanks, correcting statements, defining terms, and comparing properties of states of matter. The exam covers fundamental concepts like the states of matter, kinetic theory, and properties of solids, liquids, and gases.

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34 views2 pages

Matter and Its Composition

This document is a chemistry exam for Class VII (ICSE) focused on the topic of matter and its composition. It includes various sections such as fill-in-the-blanks, correcting statements, defining terms, and comparing properties of states of matter. The exam covers fundamental concepts like the states of matter, kinetic theory, and properties of solids, liquids, and gases.

Uploaded by

Keertana
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Chemistry

Chapter-1 Matter and Its Composition Class- VII (ICSE)

Total Marks: 40 Time : 1 hours

ALL QUESTIONS ARE COMPULSORY

I.Fill in the blanks by correct words [5]

a. On heating, solids first change to ______________ state and then to __________ state.

b. The liquids take the shape of containing _____________, because the molecules are

___________ to move.

c. The process of conversion of a gas into a liquid is called_______.

d. The state of matter which has definite shape and definite _____________are called

solids

e. The gaseous state directly formed from a solid on heating is called ______________

f. The force of attraction between the similar kind of molecules is called _____________

g. ___________ state of matter consists of electrically charged particles of gaseous matter.

h. The particles of matter are in continuous motion and such have ____________energy.

II. Statements given below are incorrect. Write the correct statements. [5]

a. A liquid can have more than one free surface.

b. Intermolecular spaces in case of solids are too large

c. Solids have definite volume, because its molecules are free to move

d. Gases can flow, but liquids cannot.

e. Gases are highly compressible, as they have very small intermolecular spaces

III. Write following answers

1 a. Define matter. [3]

b. Name three states of matter

c. State three characteristics of matter

2. State FIVE postulates of Kinetic Theory of matter [5]

3. a. Define the term Solid. [3]


b. Why solids have definite shape, but liquid does not have? - Explain

4. a. Why do liquids flow? Explain on the basis of Kinetic Theory of matter [4]

b. why Gases are highly compressible?

IV. Define the following: [5]

a. Adhesive Force

b. Element

c. Atom

d. Molecule

e. sublimation

V. State the following:

a. Which of the following substances sublime:

i. Ice ii. Iodine iii.Mercury iv. Ammonium Chloride v. Camphor [2]

b. Compare the properties of Solids, Liquids and Gases [at least 5 points] [5]

c. Name the following: [3]

i. Space between the molecules of matter

ii. A type of matter having definite shape and definite volume

iii. The temperature at which liquid is converted into vapour.

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