Page 1 - 4.Home Assignment_Pure and Impure Substances
P. 1
SAI International School
Subject-Chemistry
Ch-Is Matter around us pure?
Topic-Pure and Impure substances
HOME ASSIGNMENT
OBJECTIVE QUESTIONS
DIRECTION:Each of these questions contains an Assertion followed by Reason. Read them
carefully and answer the question on the basis of following options. You have to select the one
that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct.
(e) If Assertion & Reason both are incorrect.
Q.1 Assertion: All the particles of water are same in all respects.
Reason: Water is a compound.
Q.2 Assertion: Wood is a pure substance
Reason: Pure substances are made up of same kind of particles.
Q.3 Assertion: Salt solution does not boil at a fixed temperature
Reason: Salt solution is composed of two substances salt and water.
Q.4 Assertion: The composition of soil is same everywhere.
Reason: Soil is an impure substance.
Q.5 Assertion: Oxygen is composed of same kind of atoms.
Reason: Oxygen is an element.
Q.6 Which of the following is not a mixture?
a) Honey c) wood
b) Milk d) copper
Q.7 All of the followings are composed of same kind of particles except:
a) Iron c) sugar
b) sulphur d) Soil
