National Science Olympiad Forum By SOF Olympiad Trainer - Page 348
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Yumna saba from Navodaya Central School, Raichur
Subject :NSO    Class : Class 3

Ans 1:

Prayaan handel from Billabong high international school, Bhopal
Class : Class 4
qww

Ans 2:

saharsh m from christ nagar hss, trivandrum
Class : Class 3

Ans 3:

Aarathy Sudhir Aarav Sudhir from Global Indian International School, Abu Dhabi
Class : Class 6
I GUESS IT IS ONLY NYLON

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Atul Sanjeev from Indian School Al Ghubra, Muscat
Subject :NSO    Class : Class 6

Ans 1:

Aadhira from velammal new gen school, Medavakkam, Chennai
Class : Class 6
It's (b) because Knitting needs only 1 yarn but weaving need 2 yarns. So its (b) the correct answer.

Ans 2:

Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Class : Class 6

Ans 3:

Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Class : Class 6

Ans 4:

J Jeeva from BGS National Public School, Bengaluru
Class : Class 9

Ans 5:

pradeep718 from DPS Internation, Singapore
Class : Class 2
Answer = B

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Atul Sanjeev from Indian School Al Ghubra, Muscat
Subject :NSO    Class : Class 6

Refer to the given paragraph and select the correct option regarding X, Y and Z.
The process of making yarn from fibres is called X. Yarn are used for making fabrics. Two main processes are used to make fabrics from yarn. In process Y, two sets of yarn are arranged together to make a fabric while in process Z single yarn is used to make a piece of fabric.

A X : Knitting; Y : Spinning; Z : Weaving
B X : Spinning; Y : Weaving; Z : Knitting
C X : Weaving; Y : Spinning; Z : Knitting
D X : Spinning; Y : Knitting; Z : Weaving


Ans 1:

Sourav Jena from ODM public school , BHUBANESWAR
Class : Class 4
B

Ans 2:

SAMRA BISWAS from KENDRIYA VIDYALAYA BARRACKPORE AIRFORCE, BARRACKPORE
Class : Class 9
CLASS VI Answer should be B.....

Ans 3:

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

Ans 4:

pradeep718 from DPS Internation, Singapore
Class : Class 2

Ans 5:

pradeep718 from DPS Internation, Singapore
Class : Class 2
class vi answer should be B

Ans 6:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
B

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Atul Sanjeev from Indian School Al Ghubra, Muscat
Subject :NSO    Class : Class 6

Refer to the given dichotomous key and select the correct option.
I. (A) It is categorised as energy giving food. – Go to II
(B) It is categorised as protective food. – Go to III
II. (A) It is soluble in water. –
(B) It is insoluble in water. –
III. (A) It is needed for clotting of blood. –
(B) It helps in formation of haemoglobin. –

A Q could be glucose which is instant source of energy.
B Deficiency of S causes anaemia characterised by pale body colour, body fatigue etc.
C R causes osteoporosis in adults while S causes goitre in adults.
D P occurs in the cell wall of plant cells and in fibres.


Ans 1:

Smita De from Bishop Cotton Girls School, BANGALORE
Class : Class 6
hi can someone please help

Ans 2:

Agastya Varshney from Podar International School , Mumbai
Class : Class 7
Please help

Ans 3:

Krithi Manasvini from Alwin Memorial Public School, Chennai
Class : Class 7

Ans 4:

Tamoghna Ghosh from bal bharati public school, Jhajjar
Class : Class 6
According to the dichotomous key P, Q, R and S could be glucose, cellulose, calcium and iron respectively. Goitre is caused by deficiency of iron. Cellulose is a complex carbohydrate occurs in the cell wall of plant cells and plant fibres.

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Atul Sanjeev from Indian School Al Ghubra, Muscat
Subject :NSO    Class : Class 6

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Kushal from Chirec, Hyderabad
Subject :NSO    Class : Class 7

Ans 1:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
The speed is also constant for PQ because it is zero and should be constant.

Ans 2:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
yup you are correct

Ans 3:

Daksh from RKC, Rajkot
Class : Class 8
The answer can be A and B both. A as position is constant and B as position is moving uniformly with time. But after some thought , B is more appropriate as we can't say 0 speed is constant

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Kushal from Chirec, Hyderabad
Subject :NSO    Class : Class 7

Ans 1:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
2 5 6*3-2=232 5 18-2=2325-2=23

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Atharv salokhe from Tatyasaheb kore english academy, Warananagar
Subject :NSO    Class : Class 9

Two fixed point masses of 10 kg and 20 kg are located at (0 m, 0 m) and (5 m, 0 m). Where should a third point mass of 30 kg be kept so that the net force of attraction on 30 kg mass due to point masses 10 kg and 20 kg is zero?

A At 2.05 m from 10 kg mass
B At 2.05 m from 20 kg mass
C At 2.95 m from 10 kg mass
D At 3 m from 20 kg mass


I got stuck at x^2 10x - 25Answer by quadratic equation must be 2.07 but it is 2.05Please help me with this question

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VANSH GARG from DPSG, GHAZIABAD
Subject :NSO    Class : Class 4

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Adrita sadhu from Vidyasagar shishu niketan , Kolkata
Subject :NSO    Class : Class 5

Ans 1:

Syed Mohammad Hussain from ISAM, Muscat
Class : Class 8
Answer is A

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