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SAI International School
Subject-Chemistry

Ch-Is Matter around us pure?
Topic-Concept mapping
HOME ASSIGNMENT

Concept- Pure and Impure substances

Q1. Copper is regarded as pure substance as 1
a) It contains same kind of atoms
b) It contains different kind of atoms
c) It has different composition
d) It has different properties
Q2 Which of the following is a not pure substance? 1
a) Common salt
b) Milk
c) Glucose
d) water
Q3 Pure substances: 1
a) have visible boundary
b) are homogeneous
c) are heterogeneous
d) have different types of particles
Q4 Assertion: Cane sugar is a pure substance 1

Reason: cane sugar is homogeneous

Q5 Assertion: Compounds are impure substances. 1

Reason: Compounds contain different types of particles

Q6 Honey is considered as _______________ substance as it has 1
___________ kind of particles.

Concept: Elements, compounds and mixtures

Q1. Which of the following about compounds is incorrect? 1
a) They are pure
b) They are homogeneous
c) They contain same kind of atoms
d) They have same properties throughout
Q2 Soil is a mixture 1
a) It has non uniform composition
b) It is heterogeneous
c) It is composed of different kinds of particles.
d) All of the above
Q3 In a compound the constituent elements 1
a) Lose their own properties