National Science Olympiad Forum By SOF Olympiad Trainer
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 6

Ans 2:

gaurav from bright angle public school, delhi
Class : Class 6

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Match column I with column II and select the correct option from codes given below.

Column I Column II
(i) Ginning
(A) Cleaning and disentangling the fibres
(ii) Combing
(B) Brushing and straightening of fibres
(iii) Carding
(C) Bolls
(iv) Seed pods
(D) Cotton fibres after being separated from seeds
(v) Lint
(E) Separating fibres from seed


A(i) - (e); (ii) - (b); (iii) - (a); (iv) - (c); (v) - (d)
B(i) - (d); (ii) - (e); (iii) - (b); (iv) - (a); (v) - (c)
C(i) - (e); (ii) - (a); (iii) - (b); (iv) - (c); (v) - (d)
D(i) - (d); (ii) - (a); (iii) - (b); (iv) - (c); (v) - (e)


Ans 1:

HIMANISH BASU from APS BANGALORE , Bangalore
Class : Class 7
A

Ans 2:

NILARKA PAHARI from Young Horizons School, KOLKATA
Class : Class 6
very confusing question. Answer is option a.

Ans 3:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 8

Ans 4:

Anoushka Chhauda from Sanskriti, Pune
Class : Class 6

Ans 5:

Sidharth Maheshwari from Pathways School Gurgaon, Gurugaon
Class : Class 6
a

Ans 6:

SJ HARITHA from PSBS, BENGALURU
Class : Class 6
a

Ans 7:

Anoushka Chhauda from Sanskriti, Pune
Class : Class 6

Ans 8:

Saanvi from rvk, bengaluru
Class : Class 8
the correct answer is a

Ans 9:

Valli Rams from Blossom Public School, Thanjavur
Class : Class 3
A

Ans 10:

Valli Rams from Blossom Public School, Thanjavur
Class : Class 3
A

Ans 11:

pradeep718 from DPS Internation, Singapore
Class : Class 2
Answer : A

Ans 12:

Prachi Chauhan from ISG International , Muscat
Class : Class 8

Ans 13:

PAYAL from DPS, BHILAI
Class : Class 6
very important question .the main fanda is to understand the question/words. the answer is option A

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Samra Biswas from KENDRIYA VIDYALAYA BARRACKPORE AIRFORCE, BARRACKPORE
Class : Class 7
Answer should be C ......

Ans 2:

Ritvik Nainawatee from Freedom International School, BANGALORE
Class : Class 6
Answer should be (c). Flax is obtained from stem of flax stem and wool is obtained without harming the sheep

Ans 3:

Sujal Satish Motagi from AJ Public School, Bengaluru
Class : Class 9
Answer is (c). Because flax is used to make linen which is obtained from flax stem. Wool is made from sheep's hair without harming it.

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Select the option that correctly fills the blanks in the given sentences.
(A) (i) of a flax plant provides fibres.
(B) (ii) is the cheapest natural fibre.
(C) The process of separating cotton fibres from cotton seeds is called (iii).
(D) (iv) is obtained by spinning together a bunch of fibres.
(E) (v) is a blended fabric.
(F) The loose fluffy fibres are untangled and combed to form a long soft rope called a (vi).

(i) (ii) (iii) (iv) (v) (vi)
A Seed Jute Retting Yarn Terry-cot Sliver
B Stem Cotton Retting Yarn Terry-cot Sliver
C Seed Cotton Ginning Yarn Terry-cot Sliver
D Stem Jute Ginning Yarn Terry-cot Sliver


Ans 1:

Mrityunjay from the modern school, Delhi
Class : Class 6
I think Cotton is the cheapest fibre and someone from SOF help desk also says the same and the process of seperating cotton from cotton seeds is called Ginning only

Ans 2:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
Flax is obtained from stem and jute is the cheapest natural fibre . So , the answer is D

Ans 3:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
The answer is b right?

Ans 4:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
i did c because they are from seeds too but most are stems so d

Ans 5:

Ritvik Nainawatee from Freedom International School, BANGALORE
Class : Class 6

Ans 6:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
Jute is the cheapest natural fibre,not cotton!

Ans 7:

Ilfa MCC from Sree Gokulam public school , Calicut
Class : Class 6

Ans 8:

sofolympiadtrainer expert from Sof Olympiad Trainer helpdesk, Bangalore
Class : Class 6
cotton' is the cheapest natural fibre

Ans 9:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 6

Ans 10:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 6
Answer is d

Ans 11:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8

Ans 12:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8

Ans 13:

amogh from DELHI PUBLIC SCHOOL NOIDA, Ghaziabad
Class : Class 6
The correct answer is (D) as jute is the cheapest fibre . and stem of the flax plant provides fibres

Ans 14:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
Cotton is the cheapest right??

Ans 15:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
The answer is not b

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Consider the following statements (i - iv) and select the option that correctly identifies true (T) and false (F) ones.
(i) Angora wool is obtained from Angora sheep.
(ii) Spinning is the process of changing fibre into yarn.
(iii) Coir is obtained from fruits of Kapok tree.
(iv) The process of removing hair from the sheep is called shearing.
(v) Knitting can be done by using only one yarn.

(i) (ii) (iii) (iv) (v)
A F T F T T
B T F F T T
C F F T T T
D F F F T T


Ans 1:

Saanvi from rvk, bengaluru
Class : Class 8
correct answer is a

Ans 2:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7

Ans 3:

VAISHNAVI from SAINT JOHNS CONVENT SCHOOL LANSDOWNE, DELHI
Class : Class 5
angora wool is obtain by angora rabbit and not angora sheep. Coir is the outer covering of coconut

Ans 4:

Jahnvi Bajpai from Vibgyor High, Banagalore
Class : Class 6
angora wool is obtain by angora rabbit and not angora sheep. Coir is obtained by the husk of a coconut

Ans 5:

Aadhira from velammal new gen school, Medavakkam, Chennai
Class : Class 6
The correct answer is (A)

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Refer to the given flow chart and select the incorrect option regarding P, Q, R and S.


A P is a protein fibre whereas Q, R and S are cellulosic fibres.
B Retting is involved in processing of Q whereas ginning is involved in processing of S.
C P could be wool, Q could be jute, R could be sisal and S could be cotton.
D Fabrics made from P and S are excellent winter clothings whereas fabrics made from Q and R form excellent summer clothings.


Ans 1:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 2:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 3:

Darsh Singh from The Deens Academy, Bengaluru
Class : Class 6

Ans 4:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 8

Ans 5:

Nishka Rawat from Inventure Academy, Bengaluru
Class : Class 4
Cotton is not obtained from seed of plant so cotton can not be S!

Ans 6:

Dushyant Singh from Shree Ram Centenial School, Indore
Class : Class 6

Ans 7:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6
cotton fibre is obtained from the fruit of the cotton plant

Ans 8:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 9:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 10:

Dushyant Singh from Shree Ram Centenial School, Indore
Class : Class 6
d

Ans 11:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 12:

Madhav from Kendriya Vidyalaya Ernakulam, Ernakulam
Class : Class 6

Post Your Answer

Pushkar Nath from Gundecha education academy, Mumbai
Subject :NSO    Class : Class 3

Ans 1:

Riddhiman Bose from Don Bosco School, Kolkata
Class : Class 5
yessssssssssssssssss

Ans 2:

Anagh Agrawal from Billabong high, JABALPUR
Class : Class 3
Yessssss

Ans 3:

Arjun Gourineni from chirec heydrabad, heydrabad
Class : Class 4
Yesssssssssssss

Ans 4:

Darshini Chakravarty from Pinnacle High International School, Mumbai
Class : Class 4

Post Your Answer

Kavitharini Joseph from HUS, Chennai
Subject :NSO    Class : Class 4

Ans 1:

Aamena Shahid Ansari from St. Xavier's high school, Vapi, Gujarat
Class : Class 4
The answer is option “c”. see it was boiling water, she poured first into container “a” so it will be having the highest temperature than she poured to container b than to c and finally to container d so during this experiment the boiling water goes to lowest temperature and the last container was container d . So container a will be having the highest temperature and container d will be having the lowest temperature.

Post Your Answer

Garima shokeen from N K Bagrodia Public School, New Delhi
Subject :NSO    Class : Class 9

Ans 1:

Shalin Jain from NKDAV Sidheegram, Sidheegram
Class : Class 9
Option D

Post Your Answer

Garima shokeen from N K Bagrodia Public School, New Delhi
Subject :NSO    Class : Class 9

Refer to the given key and answer the following questions.
(i) Membrane with definite pores - P
(ii) Inner membrane with stalked particles - Q
(iii) Inner membrane connected into stacks like structures - R
(iv) Sac like organelle containing hydrolytic enzymes - S
(v) Membraneless organelle composed of one large and one small subunit. - T Select the option that correctly identifies any of these organelles.

A P - Nucleus, Q - Mitochondrion, S - Ribosome
B Q - Chloroplast, R - Mitochondrion, T - Ribosome
C R - Chloroplast, S - Lysosome, T - Ribosome
D P - Nucleus, Q - Chloroplast, R - Mitochondrion


Ans 1:

Shalin Jain from NKDAV Sidheegram, Sidheegram
Class : Class 9
Option A

Ans 2:

SAKSHI KOTHARI from NAVRACHNA SCHOOL SAMA, Vadodara
Class : Class 7
a

Ans 3:

Shrestha Dutta from Julien Day School, KALYANI
Class : Class 10
opt c is correct

Post Your Answer