Page 1 - Home Assignment 1. Subjective and Obj

SAI International School
Subject-Chemistry

Ch-Is Matter around us pure?
Topic- Difference between Elements and Compounds
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: Iron sulphide does not dissolve in carbon disulphide
Reason: Iron sulphide is a mixture.
Q.2 Assertion: Smoke can be represented by a chemical formula.
Reason: Smoke is composed of different substances.
Q.3 Assertion: The salt can be separated from salt solution by evaporation.
Reason: Mixtures can be separated by physical methods of separation.
Q.4 Assertion: Sea water does not have a fixed boiling point.
Reason: Sea water is heavier than pure water.
Q.5 Assertion: Water extinguishes fire.
Reason: Hydrogen present in water can burn.
Q.6 Which of the following statements about glucose is incorrect?
a) It fixed melting point.
b) It can be represented by a chemical formula.
c) It is made up of carbon, oxygen and hydrogen.
d) It is heterogeneous.
Q.7 Which of the following statements about aluminum is true:
a) It cannot be represented by a symbol. c) It is composed of different kind of
b) It is homogeneous atoms.
d) It has a dull surface
Q.8 Milk is a:
a) Mixture c) element
b) compound d) non-metal