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

User Forum

Ask Your Question
Shaurya Suryawanshi from The Orbis school, Pune
Subject :NSO    Class : Class 4

Post Your Answer

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Subject :NSO    Class : Class 5

Read the given paragraph with few blanks and select the option that correctly fills these blanks.
Plants reproduce vegetatively by different means. Plants like ______ reproduce with the help of leaves,______ and ______ reproduce by stem and ______ reproduces by roots. Some plants like mushrooms reproduce by ______.

ABryophyllum, potato, turnip, ginger, spores
BBegonia, onion, rose, sweet potato, seeds
CBryophyllum, rose, potato, turnip, spores
DBegonia, potato, onion, sugarcane, seeds


Ans 1:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5
I am bengali , hindi , english and malayalam . This looks pity to me !!!!!!!!!!!!!!!!!!!

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5

Ans 3:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5

Ans 4:

Tasneem from FAIPS, kuwait
Class : Class 6
c

Post Your Answer

vedant khatri from G D Goenka Public School Bareilly, bareilly
Subject :NSO    Class : Class 8

When light falls on a surface, light bounces off the surface. This is called reflection. When light falls on a smooth surface, the surface reflects the light in a well defined manner. The best example is plane mirror.
Why rose appears red in colour to our eyes?

AIt absorbs the red colour and reflects rest of the colours.
BIt absorbs the red colour and refracts rest of the colours.
CIt refracts the red colour and absorbs rest of the colours.
DIt reflects the red colour and absorbs rest of the colours.


Ans 1:

anwesha from v s n, midnapore
Class : Class 10
DIt reflects the red colour and absorbs rest of the colours.

Post Your Answer

Soorya Tej R from Delhi Public School, Hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Anargha Nandi from Bishop Morrow School, Krishnagar
Class : Class 3
You are right. It should be D.

Ans 2:

Adrita Dey from Bishop Morrow School , Krishnanagar
Class : Class 3
I think you are right it should be D.

Ans 3:

ASHMI Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4

Ans 4:

ASHMI Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
d

Ans 5:

ALICE from CENTRAL ACADEMY, UDAIPUR
Class : Class 1
the correct is D.

Ans 6:

ALICE from CENTRAL ACADEMY, UDAIPUR
Class : Class 1
You are wrong.The correct answer should be D.

Ans 7:

RAYANSH MISHRA from VIBGYOR HIGH, Pune
Class : Class 3
d is the answer

Post Your Answer

Saransh Agrawal from Meridian School, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is A because bituminous is not an ore, typhoid is not a vector-borne disease and nutcracker is not a class 1 lever.

Post Your Answer

Aniket Ghosh from DAV Public School Haldia, Haldia
Subject :NSO    Class : Class 6

Ans 1:

saanvi from rvk, bengaluru
Class : Class 6
the answer is b . this is because sun tan is temporary.

Ans 2:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 7
answer is b

Post Your Answer

Kaustubh Doval from Mirambika Free Progress , Delhi
Subject :NSO    Class : Class 8

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

Column I Column II
P. Nylon (i) Burns quickly with a smell of burning paper
Q. Wool (ii) Burns with sooty flame, fabric shrinks and black beads are formed
R. Acrylic (iii) Shrinks after exposure to flame, forms hard beads and gives a smell of burning hair
S. Rayon (iv) Burns slowly with a smell of burning hair


A P - (i), Q - (iv), R - (ii), S - (iii)
B P - (iii), Q - (iv), R - (ii), S - (i)
C P - (iv), Q - (iii), R - (i), S - (ii)
D P - (ii), Q - (iv), R - (iii), S - (i)


Ans 1:

Ankit kumar Jha from Ryan International School, Ghaziabad
Class : Class 8
wrong answerthe answer should be B

Ans 2:

SAIRAM from TRIVENI TALENT SCHOOL, HYDERBAD
Class : Class 8

Ans 3:

Anshuman D from MVM, Hyderabad
Class : Class 8
Supposed to be D

Ans 4:

Abhinav Aggarwal from delhi public school, ghaziabad
Class : Class 8
wool burns with smell of burning hair

Ans 5:

ARNAB MANDAL from NAVY CHILDREN SCHOOL, VIZAG
Class : Class 9
nylon burns with a smell of plastic, not burning hair. WTF?

Ans 6:

S V Harini from Vailankanni public school , Krishnagiri
Class : Class 8
How is this possible Nylon burns with smell of hair???

Post Your Answer

from , Kolkata
Subject :NSO    Class : Class 8

Post Your Answer

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Subject :NSO    Class : Class 4

Ans 1:

om from jbcn, MUMBAI
Class : Class 4

Ans 2:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4

Ans 3:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 4

Ans 4:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 5
there is air friction against gravity. so answer is B

Ans 5:

Debarpan Das from Delhi Public School , Durgapur
Class : Class 5

Ans 6:

Medha Bijjaram from Prime Academy, Mumbai
Class : Class 5

Ans 7:

Kaira Srivastava from Global Indian International School, Bangalore
Class : Class 8
I think c

Ans 8:

VANSH GARG from DPSG, GHAZIABAD
Class : Class 4

Ans 9:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
There is no explanation for the answer. How do we understand sof?

Ans 10:

Sreejani Bhaduri from National Public School, Bangalore
Class : Class 4
Kqwertyuiopasdfghjklzxcvbnm,.-/:;(₹

Ans 11:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4

Ans 12:

Ayushi from DPS Noida, Noida
Class : Class 4
Air always act as Frictional force against Gravity Hence ans is B in this case

Ans 13:

Medha Bijjaram from Prime Academy, Mumbai
Class : Class 5

Ans 14:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4
THERE IS NO SOLUTION SOB HOW CAN WE UNDERSTAND

Post Your Answer

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Subject :NSO    Class : Class 5

Ans 1:

ATUL SANJEEV from Indian school Ghubra, Muscat
Class : Class 6
the answer is A

Ans 2:

Piyush Kumar Pruseth from Sri Aurobindo Integral Education and Research Centre, Rajgangpur
Class : Class 5
Answer is A

Ans 3:

Rohan TR from Sri Aurobindo memorial school, Bangalore
Class : Class 5
A

Ans 4:

Piyush Kumar Pruseth from Sri Aurobindo Integral Education and Research Centre, Rajgangpur
Class : Class 5
Answer is A

Ans 5:

Praket Tejas from Delhi Public School Indira Nagar Lucknow, Lucknow
Class : Class 4
l

Ans 6:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 6
I

Post Your Answer