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

User Forum

Ask Your Question
Sanjana Iyer from HFS Powai, Mumbai
Subject :NSO    Class : Class 6

Ans 1:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
The correct answer will be A as Milky Way is a spiral-shaped galaxy and one revolution of the Earth is completed in about 365.25 days and this time period is called a solar year.

Ans 2:

Harry Potter from Hotel California, California
Class : Class 6
Answer is A NOT b

Ans 3:

Ashutosh Sundresh from Global Indian International School, Pune
Class : Class 8
ANSWER IS A, NOT B AS THE QUESTION SAYS TO CHOOSE THE CORRECT OPTION AND NOT INCORRECT OPTION.

Ans 4:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
Please stop these kind of mistakes. I have given many complaints.

Ans 5:

Shriyann from Lodha World School, Thane
Class : Class 7

Ans 6:

Vinayak Subramani from Euroschool , Mumbai
Class : Class 7
there are too many silly errors in your papers like these. i am tired of writing complaints again and again. you better respond to this quickly. the explanation you have given in solution is correct but the answer is wrong. it should be 'a' and not 'b'.

Ans 7:

Ashher Pervez from DPS Bhilai, Bhilai
Class : Class 7
I think the question was wrong as they ate showing incorrect statements. This means the question was like this. Which of the following statements are incorrect?

Ans 8:

Ashher Pervez from DPS Bhilai, Bhilai
Class : Class 7

Ans 9:

saanvi from rvk, bengaluru
Class : Class 6
the question must be wrong.

Ans 10:

Akash Mukhoti from Dps gurgaon, Gurugram
Class : Class 6
please correct the mistake as the question says that which is the correct option instead of incorrect.

Ans 11:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
They are asking for the CORRECT answer so its A

Ans 12:

SAGNIK CHAKRABORTY from DELHI PUBLIC SCHOOL , KOLKATA
Class : Class 7
The answer is A

Ans 13:

nimay gupta from genesis global school, noida
Class : Class 7
Excuse me. The answer is not b, its a. They say it themselves in the solution. I suppose it's a mistake

Ans 14:

Dipam from Podar International School, Aurangabad
Class : Class 8
(i) Milky Way is a spiral-shaped galaxy. --- Corrrect (ii) Planet Venus has 63 Moons. -------------Wrong ( it does not have moons) (iii) Satellites are small heavenly bodies that revolve around the Sun. --Wrong (they revolve around planets) (iv) One revolution of the Earth is completed in about 365 1/4 days. This time period is called a solar year. --Correct Therefore correct option is (A)

Post Your Answer

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

The different steps of processing of cotton are given below randomly.
(i) Spinning
(ii) Weaving
(iii) Ginning
(iv) Carding
(v) Combing
Which of the following represents the correct sequence of steps?

A (iii) → (iv) → (v) → (i) → (ii)
B (iv) → (ii) → (i) → (v) → (iii)
C (iii) → (v) → (iv) → (i) → (ii)
D (iii) → (i) → (iv) → (v) → (ii)


Ans 1:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 2:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 3:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 4:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 5:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 6:

Veda Dua from DPS R K PURAM, New Delhi
Class : Class 6
A

Ans 7:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 8:

Saurabh from Global Indian international school, Singapore
Class : Class 6
I rock,i am the smartest and i say that A is correct

Ans 9:

Aarush from Podar, Mumbai
Class : Class 7

Ans 10:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 11:

Saurabh from Global Indian international school, Singapore
Class : Class 6

Ans 12:

saanvi from rvk, bengaluru
Class : Class 6

Post Your Answer

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

Post Your Answer

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

Ans 1:

from ,
Class :
B....be coz both are plant derivatives....paper and cotton....

Post Your Answer

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

Ans 1:

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:

Prachi Chauhan from ISG International , Muscat
Class : Class 7

Ans 2:

saanvi from rvk, bengaluru
Class : Class 6
the correct answer is a

Ans 3:

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

Ans 4:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 7

Post Your Answer

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

Ans 1:

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 2:

Sujal Satish Motagi from AJ Public School, Bengaluru
Class : Class 8
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:

archit from st Joseph's school, sonedhadra
Class : Class 5

Ans 2:

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 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 6
The answer is b right?

Ans 7:

archit from st Joseph's school, sonedhadra
Class : Class 5

Ans 8:

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

Ans 9:

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 10:

Harry Potter from Hotel California, California
Class : Class 6
Flax is obtained from stem and jute is the cheapest natural fibre . So , the answer is D

Ans 11:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 6
Cotton is the cheapest right??

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:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7

Ans 2:

saanvi from rvk, bengaluru
Class : Class 6
correct answer is a

Ans 3:

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

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:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 7

Ans 2:

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

Ans 3:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 4:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 5:

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

Ans 6:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Post Your Answer