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SAI International School
Class – VII

Subject – Chemistry
Topic – Animal Fibres
Sub-Topic – Differentiate Natural Wool & Silk Fibre from Synthetic Fibres

HOME ASSIGNMENT
S.L Questions Mar Skill
No. k
Q.1 On burning smell of plant fibres is equal to 1 R
a) Burning smell of paper b) Burning smell of
plastic c) Burning smell of hair d) None of these
Q.2 On burning smell of animal fibres is equal to 1 K
Burning smell of plastic b) Burning smell of paper c)
Burning smell of hair d) None of these

Q3. On burning smell of synthetic fibres is equal to 1 K
a) Burning smell of plastic b) Burning smell of
paper c) Burning smell of hair d) None of these

Q.4 Ash of burning plant fibres is 1 K
a) Soft and smooth b) Form uncrushable beads c)
Form crushable bead d) None of these.
Q5. Ash of burning synthetic fibres is 1 U
a) Soft and smooth b) Form uncrushable beads c)
Form crushable bead d) None of these
Q6. Ash of burning animal fibres is 1 U
a) Soft and smooth b) Form uncrushable beads c)
Form crushable bead d) None of these
Q7. Woollen & silk fibres on subject to flame 1 U
a) Curl away from flame b)Cath fire easily c) Melt
on burning d) Don’t catch fire

Q8. Synthetic fibres on subject to flame 1 A
b) Curl away from flame b) Cath fire easily c) Melt
on burning d) Don’t catch fire

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 basis of the following options. You must select the
one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the

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