National Science Olympiad Forum By SOF Olympiad Trainer - Page 612
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VANSH GARG from DPSG, GHAZIABAD
Subject :NSO    Class : Class 3

Ans 1:

Vartika kumar from D P S Newtown, Kolkata
Class : Class 9

Ans 2:

Samik Praveen from Euro School Airoli, Mumbai
Class : Class 6
I couldn't even scorl

Ans 3:

Aneesh Balaji from BVBARR school, Hyderabad
Class : Class 9
c

Ans 4:

Vedika from Delhi Public School, Noida
Class : Class 3

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C

Gases do not have a fixed shape and are compressible, liquids also do not have fixed shape but cannot be compressed as they have a fixed volume. Solids have fixed shape, fixed volume and can either float or sink in water depending upon their density.


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Devansh from asn senior secondary school, delhi
Subject :NSO    Class : Class 3

Ans 1:

PONMANIKANDAN PONRAJ from FAIPS, KUWAIT
Class : Class 3
The answer is B

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B - Gibbous


Ans 3:

Sneha Sarkar from South city international school, Kolkata
Class : Class 7
B

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Rudra Veer Singh from Delhi Public School Noida, Noida
Subject :NSO    Class : Class 3

Ans 1:

Rudra Veer Singh from Delhi Public School Noida, Noida
Class : Class 4
i am a genius

Ans 2:

Rudra Veer Singh from Delhi Public School Noida, Noida
Class : Class 4
I AM IN CLASS 10TH BUT IT IS WRITTEN WRONG SO SORRY [IT IS WRITTEN CLASS 3RD]

Ans 3:

Kanishk bhati from G D goenka school gzb, ghaziabad
Class : Class 3
but I think small one

Ans 4:

Rudra Veer Singh from Delhi Public School Noida, Noida
Class : Class 4
Aq1wwwwwwwwwwwwwww

Ans 5:

Rudra Veer Singh from Delhi Public School Noida, Noida
Class : Class 4
TRH J3we]ART68 [PL;[0]'1;LPO; [KOREN]YUL

Ans 6:

Arihant Medhi from Dps Barasat, Kolkata
Class : Class 8

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Eashan Mitra from Don Bosco Park Circus , Kolkata
Subject :NSO    Class : Class 7

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Eashan Mitra from Don Bosco Park Circus , Kolkata
Subject :NSO    Class : Class 7

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Vedika from Lotus, Gurgaon
Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

Count the number of total balls = 21
Count the number of crossed balls = 6
So, the subtraction sentence will be 21 - 6.
Now make the subtraction sentences for all options:
(A) 2 tens 1 one - 6 ones = 21 - 6 
(B) 2 tens 2 ones - 6 ones = 22 - 6 
(C) 2 tens - 6 ones = 20 - 6
(D) 2 tens 3 tens - 6 ones = 23 - 6


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Shiven Dinkar from DPS NOIDA Sector 30, Delhi
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B.

Total Smileys = 56
Green Smileys = 8
Fraction of Green Smileys = 8/56 = 1/7


Ans 2:

Prajwal Thakur from South Point High School, Kolkata
Class : Class 9
It will be 8/56,every answer is wrong because its a proper fraction so 8/56=8/56

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Atul Sanjeev from Indian School Al Ghubra, Muscat
Subject :NSO    Class : Class 5

Ans 1:

Deepayan Das from South Point High School, Kolkata
Class : Class 6
It is not c because new plants can rise by vegetative reproduction which are not by seeds.It is by roots, stem or leaves. what, in case of byrophyllum plant.

Ans 2:

KONDURU TEJESH from Sri chaitanya international school, Bangalore
Class : Class 4
i pressed option c but its incorrect

Ans 3:

Rudra Tripathi from DPS Noida, Noida
Class : Class 10
I think answer is (C) as flowers changes into fruit and fruit changes into seed.

Ans 4:

Arnav Vashisth from GD GOENKA PUBLIC SCHOOL, Delhi
Class : Class 5
c) WHY? Here it goes:How will it reproduce without flowers?Ideally? Leaves? Does cactus have leaves? Nope! It has leaves -2 - spines...

Ans 5:

CrazyRIDZ from Samhita , Bengaluru
Class : Class 6
but seeds can reproduce through stem , leaves , and root too , can't they ???

Ans 6:

Abhijato Chatterjee from Bharatiya Vidya Bhavan, Kolkata, kOLKATA
Class : Class 6
the answer is d as many plants don't have flowers but still reproduce. Without the leaves, the plants can't make food.

Ans 7:

shalini mittal from DPS Greater Noida, Greater noida
Class : Class 4
I think it is seed only because if the other parts will no be there than how the previous plant will grow

Ans 8:

Goutham Ram from Lecole' Chempaka International, Trivandrum
Class : Class 5
All the answers are correct. None of them are wrong.

Ans 9:

Shubh Neema from St Norbert seniors secondary school, Indore
Class : Class 10
Stem is also correct for some plants like mint ,

Ans 10:

Shreeya Mangla from ASN Senior Secondary School, New Delhi
Class : Class 9
some plants can grow by vegetative reproduction which is not by flowers. Like carrots, Carrots does not have any flowers. I think the answer is D because if there are no leaves then who will make the food for the survival of the plant.

Ans 11:

Nitya from PPSD, Dombivali
Class : Class 5
Think the correct ans'rs C Cause a flower changes into a fruit in the fruit then bears seads which give rise to new plants on being down in soil. That's what I think don't know if it is right!!!

Ans 12: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C

Flower changes into fruits and fruit bears seeds. Seeds give rise to new plants when sown into soil.


Ans 13:

Mohhika Sharma from Delhi Public School Greater Noida, Noida
Class : Class 5
Deepayan and Sumit are right..of course it is d, if there are no leaves the plant will die, how is it going to reproduce then??

Ans 14:

Ruhaan Singh from Gopalan International School, Bangalore
Class : Class 7
d

Ans 15:

Vishnuteja V from BVBARRS, Hyderabad
Class : Class 6
In papaya plant, flower changes into fruit and fruit bears seeds. Seeds give rise to new plants when sown into the soil.

Ans 16:

Piyush Kumar Pruseth from Sri Aurobindo Integral Education and Research Centre, Rajgangpur
Class : Class 5
Flower attract the insects for pollination,so the answer is C

Ans 17:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
WE HAVE READ THAT THEY CAN GROW WITHOUT FLOWERSIF THEY HAVE NOT FLOWERS THEY GROW IN A DIFFERENT MANNERVERY STUPID OF SOFSO MANY ERRORSWHAT EVER CORRECT OPTION IS D

Ans 18:

Yukta Jalasutram from Sunrise International School Abu Dhabi, Abu Dhabi
Class : Class 5

Ans 19:

Ishaan Singhal from CCWS, Jaipur
Class : Class 5
but in some plants ther is no flower then also they can reproduce in a different manner

Ans 20:

Shruthi Murugaiyan from Kendriya Vidyalaya IIT, Chennai
Class : Class 8

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Anshuman Mishra from kv no 3, Bhubaneswar
Subject :NSO    Class : Class 6

Ans 1:

ankit from i like peeing, guraon
Class : Class 7
ANSWER SHOULD BE C BECAUSE FIRRST IS CORRECT BUT METALS ARE GOOD CONDUCTERS OF HEAT

Ans 2:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
b is the answer

Ans 3:

ADVAY BANSAL from LOTUS VALLEY INTERNATIONAL SCHOOL GURUGRAM, GURUGRAM
Class : Class 6
what is this man do something

Ans 4:

Mayank Pramanik from Sri Chaitanya Techno School, Pune
Class : Class 6
IT WILL BE DDDDDDDDDDDDDDDDDDD

Ans 5:

Aarathy Sudhir Aarav Sudhir from Global Indian International School, Abu Dhabi
Class : Class 7

Ans 6:

Taanvi from , Bangalore
Class : Class 9

Ans 7:

R SANKARSHNAN from NPS, BANGALORE
Class : Class 9
It is A

Ans 8:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 7
The answer is 'a' because the rods are fully coated with wax, those rods which have less wax are good conductors because the wax melted and fell from it.

Ans 9:

A S Neeraj from K V 2, Chennai
Class : Class 6

Ans 10:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh
Class : Class 8
why is everyone talking about wax and copper it is a question about statements and conductivity like bruh what

Ans 11:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
dddddddddddddddddddddddd

Ans 12:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
I too agree with you .It's B and not A

Ans 13:

Arkaprabho Sau from Griffins International School, Kharagpur
Class : Class 9
It must be 'B' not 'A'

Ans 14:

Eashta Khodke from Elpro International School Chinchwad Pune, Pune
Class : Class 8
OK

Ans 15:

gayathri from NPS, Bengaluru
Class : Class 3
the wax has been applied all over the rod. copper has the least amount of wax on it. So it is the best conductor of heat whereas the glass rod has the most amount of wax thus it is the weakest conductor of heat.Thus,the option "A" is the correct answer

Ans 16:

Saatwik Padhy from TREE HOUSE HIGH SCHOOL, VIRAR
Class : Class 8

Ans 17:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Sorry for giving the wrong information. At the beginning even I thought the answer was B.If you click the solution button, it says that since the copper rod has the least amount of wax on it, it is the better conductor as all the other wax on it has melted and fell down. That is why the answer is A not B

Ans 18:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
it cannot be as you have said because the wax is dripping from the glass rod whereas on the copper rod, it is as it was first placed. And they will not give us a diagram if they are going to ask something not related to it.So, the answer must be B and not A.

Ans 19:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 9
ACCORDING TO ME THE CORRECT ANSWER IS B , FIRST WE HAVE TO UNDERSTAND THE PICTURE AND THEN ANSWER

Ans 20:

Vivaan Kohli from Greenwood High International School, Bangalore
Class : Class 7

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from ,
Subject :NSO    Class : Class 1

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