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HARSHAL KUTE from cambridge school buldhana, Buldhana
Subject :NSO    Class : Class 6

Refer to the given dichotomous key and select the incorrect statement regarding P, Q, R, S and T.

(i) (A) It is a natural fibre.- Go to (ii)
(B) It is a man-made fibre. -
(ii) (A) Fibre is obtained from plants.
- Go to (iii)
(B) Fibre is obtained from animals.
- Go to (iv)
(iii) (A) Fibre obtained from stem. -
(B) Fibre obtained from seed. -
(iv) (A) Fibre obtained by harming source organism. -
(B) Fibre obtained without harming source organism. -

A Fibre P is quick burning and shrinks away from flame giving slightly sweet chemical odour.
B Q could be obtained from Corchorus capsularis while R could be obtained from Gossypium hirsutum.
C Fibre S is obtained from an insect whereas fibre T is obtained from a mammal.
D Fabric made of S can be worn in all seasons whereas fibre Q can be used to make a raincoat.


Can't silk worn in all seasons???????????

Ans 1:

Sof Team from Sof Olympiad Trainer Helpdesk, Bangalore
Class : Class 8

Ans 2:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
(D) is totally false . raincoat is made from plastic only which is a man made fiber .

Ans 3:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 9
C

Ans 4:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
D is false as silk cannot be worn in all seasons .

Ans 5:

Niranjhan Rajeshkumar from Deens Academy, Whitefield, Bengaluru
Class : Class 7
C is the answer

Ans 6:

Veda Dua from Delhi Public School, R. K. Puram, New Delhi
Class : Class 10
D SHOULD BE THE CORRECT ANSWER

Ans 7:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
d

Ans 8:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 9
c should be the answer as silk is obtained from silkworm(insect) by harmingand wool,angora wool , etc are obtained without harming the mammal

Ans 9:

khushi Joshi from Svkm , Mumbai
Class : Class 10
Silk can't be worn in monsoon and winter, because it is not waterproof and it does not trap heat.

Ans 10:

Veda Dua from Delhi Public School, R. K. Puram, New Delhi
Class : Class 10
D

Ans 11:

khushi Joshi from Svkm , Mumbai
Class : Class 10
That is why Silk cannot be worn in all seasons

Ans 12:

Saipriya from Sankara, Chennai
Class : Class 8
D -

Ans 13:

Aahan Jain from ,
Class : Class 1
D cannot be an answer because raincoat cannot be made of jute

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