Page 1 - 4.3-H.A- PROPERTIES AND QUALITY OF WOOL

SAI International School
Class – VII

Subject – Chemistry
Topic – Animal Fibres
Sub-Topic – Properties & Qualities of Wool

HOME ASSIGNMENT
Objective:

S.L Questions Mar Skill
No. k
Q.1 Retaining of nice appearance for long time of wool 1 R
fibre is called its
a) Moisture absorption capacity b)Dye ability
c)Durability d)Insulating nature
Q.2 Wool is composed of
a) Carbohydrates b) Proteins c) vitamins d) minerals 1 K

Q.3 Wool does not burn easily. This property of wool is called 1 K
a) Resistance to fire b) durability c) Insulator
d) Absorption of moisture
Q.4 The quality of wool is judged by 1 U
a) wool length b) diameter c) Elasticity d) All of these
Q.5 Wool can be coloured with different types of dyes. his 1 U
property is called as
a) Moisture absorption capacity b) Dye ability
c) Durability d) Insulating nature
Q.6 Wool does not allow to heat to transfer through very easily. 1 K
This property of wool is called
a) Resistance to fire b) durability c) Insulating nature
d) Absorption of moisture
For Assertion& Reason question follow the following directions.
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.7 Assertion: Woollen clothes are worn in winter. 1 U&A
Reason: It is warm to wear.
Q.8 Assertion: Wool is bio degradable in nature. 1 U&A
Reason: It is composed of natural proteins.
Q.9 Assertion: Wool does not burn easily. 1 U&A

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