National Science Olympiad Forum By SOF Olympiad Trainer - Page 590
  1. Home
  2. /  Forum

User Forum

Ask Your Question
ansh rai from delhi public school, Bhilai
Subject :NSO    Class : Class 5

Ans 1:

Harsh Sobti from the samhita academy, BLR
Class : Class 5

Ans 2:

Shreetej from Pearson public school, Pune
Class : Class 5
Its option (c), mechanical into kinetic

Ans 3:

Pratham Dave from GNS, Bangalore
Class : Class 7
Mechanical into kinetic energy.

Ans 4:

Pritisha priya from Global Indian International School, Abu Dhabi, Abu Dhabi
Class : Class 7
C.Mechanical, Kinetic

Ans 5:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
mechanical into kinectic

Ans 6:

RISHABH from SUMMER FIELD, GURGAON
Class : Class 5
c

Ans 7:

Tanvi from hh, delhi
Class : Class 5
Hey, anyone wants to explain to me why it is option C?

Ans 8:

Saiprajna Panda from Kendriya Vidyalaya, Central University of rajasthan, Kishangarh
Class : Class 5
actually it is written wrong

Ans 9:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Wanna explain why?

Ans 10:

NAISHA JAJWARE from dps noida, noida
Class : Class 5
c

Ans 11:

shaurya aggarwal from scholars rosary senior secondary school, rohtak
Class : Class 9
Mechanical,kinetic

Ans 12:

Poulami Dan from Aditya Academi, Kolkata
Class : Class 5
c

Ans 13:

shreedhar from the shri ram school, delhi
Class : Class 5
mechanical,kinetic (c)

Ans 14:

Ishani Gandhi from Lourdes convent school, Surat
Class : Class 6
In the options, it is written wrong because it is mechanical , kinetic energy. Instead of that it should be muscular, kinetic energy

Post Your Answer

swagatika from giis, BENGALURU
Subject :NSO    Class : Class 2

Ans 1:

Saatviki from Ryan International School, PUNE
Class : Class 6

Ans 2:

anu from Haralur, Bengaluru
Class : Class 5
D;none of these

Ans 3:

Mahi Chandra from ICON School of Excellence, Bengaluru
Class : Class 3
Mahi from Icon School Of Excellence, BengaluruClass:2D;none of these

Ans 4:

Ipshita from VIBGYOR, Bengaluru
Class : Class 1
The correct answer is d.

Post Your Answer

ansh rai from delhi public school, Bhilai
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.


Post Your Answer

Sai srikar from Mitra academy, Bangalore
Subject :NSO    Class : Class 5

Ans 1:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Only this question I got wrong

Ans 2:

VISHNU from NARAYANA OLYMPIAD GOPALAPURAM, chennai
Class : Class 5
I ticked the answer as D because fish have gills but the others dont

Ans 3:

Mohhika Sharma from Delhi Public School Greater Noida, Noida
Class : Class 5
I chose snake too, so Biju Pappachan and Arumolzhi Ramesh, I have the same thought process- it sheds its skin.

Ans 4:

Shreeya Mangla from ASN Senior Secondary School, New Delhi
Class : Class 9
Snake, lizard and fish have scales as body covering while rhinoceros doesn't. Hence the correct answer is C

Ans 5:

arulmozhi ramesh from Kv, Coimbatore
Class : Class 9
Snakes can peel their skin of while the others can’t

Ans 6:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The correct answer is CRhinoceros does not have scales on body

Ans 7:

from harvest,
Class : Class 5
The correct answer is CRhinoceros doesn't have scales on their body while snake, lizard and fish have scales as body coveing

Ans 8:

Arnesh from DPS Mathura Road , New Delhi
Class : Class 7
Correct is c because rhino does not have scales while others do

Ans 9:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Google says lizards have scales.

Ans 10:

arulmozhi ramesh from Kv, Coimbatore
Class : Class 9

Ans 11:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Honestly, if you ask me,I chose snake as the answer because they can peel of their skin while the others can’t. So,Arumolzhi Ramesh I was thinking the same thing. But SOF and most of you guys say that the correct answer is C Rhinoceros as they do not have scales while the other three do. So it must be correct although I did not know lizards had scales on their bodies but as a matter of fact, they do so C must be the correct answer.

Ans 12: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.

Rhinoceros does not have scales on body while snake, lizard and fish have scales as body covering.


Ans 13:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The correct answer is CRhinoceros does not have scales on body while snake, lizard and fish have scales as body covering

Ans 14:

Shloka Kulkarni from Pawar Public School, Nanded City, Pune
Class : Class 5
Ans is C

Ans 15:

Nilarka Pahari from Young Horizons School, Kolkata
Class : Class 4
Do lizards really have scales? I don't think so.

Post Your Answer

Ayush Das from Griffins international school , Midnapur
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
To get a complete range of Olympiad Preparation Products (including previous years papers) log on to WWW.mtg.in, content partner for SOF Olympiads. For more details visit our website- details available on www.sofworld.org

Post Your Answer

sarag bordoloi from dps numaligarh, golaghat
Subject :NSO    Class : Class 6

Ans 1:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
amoeba divides itself it does not lay eggs. they all lACK A BACKBONE

Ans 2:

Anshuman Mishra from kv no 3, Bhubaneswar
Class : Class 7
the ans is b

Ans 3:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 9
The backbone or the vertebral column is a long, bony, rod–like structure, which extends from the base of the skull to the lower back. The animals which possess the backbone are called vertebrates and the ones which do not possess it are called invertebrates. Ant, spider, octopus, amoeba and starfish, are all invertebrates.So, the answer is B. Amoeba does not lay eggs. It is an unicellular organism which divide by binary fission.

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I agree with ARUNAV

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The backbone or the vertebral column is a long, bony, rod–like structure, which extends from the base of the skull to the lower back. The animals which possess the backbone are called vertebrates and the ones which do not possess it are called invertebrates. Ant, spider, octopus, amoeba and starfish, are all invertebrates.So, the answer is B. Amoeba does not lay eggs. It is an unicellular organism which divide by binary fission.

Ans 6:

Siddhanth Subramanian from Global Indian International School , Singapore
Class : Class 7

Ans 7:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
admin , who are you ? why you do not tell your real name ?

Ans 8:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh
Class : Class 8
why is everyone talking about animals?! I got a question about plants specifically complete and incomplete flowers. SOF PLEASE HELP ME HELP ME!!!!!!!!! AND THAT ADMIN IS COMPLETELY USELESS

Ans 9:

arshi.jain4004@gmail.com from ,
Class : Class 1

Ans 10:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 6
i agree with AYAAN VOHRA the admin is useless and the question is:which of the following is an example of incomplete flower?A) mulberryB) peaC) mustardD) hibiscusi chose (B) but sof said it's(A) and when i checked solutions it said" ." so I searched the forum but everyone(including the"admin")are talking about animals and amoeba.SOF PLS HELP!!!!!!!!!!!!

Ans 11:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 6
AND THE ANSWER IS AND THE ANSWER IS (A) MULLBERRY as the other three have all the four whorls

Ans 12:

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

Ans 13:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh
Class : Class 8
GIMME GIMME THE ANS

Post Your Answer

Nupur Sangwai from Podar International Parbhani, JINTUR
Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is D. Black residue is obtained in test tubes I and III i.e., iron gets displaced in test tubes I and III. Therefore, metals P and R should be more reactive than iron. No change is observed in test tubes II and IV hence, metals Q and S should be less reactive than iron.

Ans 2:

Anvesha Dubey from Lodha World School , Dombivali
Class : Class 5
Since the residue obtained was black in colour and we know that only Zinc and Copper on reacting with Iron give a black residue hence the answer is Option D

Post Your Answer

Gireesha from innocent hearts school jalandhar, Jalandhar
Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is D. The method used to extract metals from the ore in which they are found depends on their reactivity. For example, reactive metals such as aluminium are extracted by electrolysis, while a less-reactive metal such as iron may be extracted by reduction with carbon or carbon monoxide. The metals low in the reactive series are very less reactive. The oxides of such metals can be reduced to metals by heating alone e.g. mercury is obtained from its ore, cinnabar (HgS), by the process of heating. Metals like iron, zinc, lead etc. occur as sulphides or carbonates in nature. First the ore is converted into its oxide form This is done by either roasting or by calcination. The metal oxide is reduced to metal by using suitable reducing agent such as Carbon.

Ans 2:

Anvesha Dubey from Lodha World School , Dombivali
Class : Class 5
Option D

Post Your Answer

gayathri from NPS, Bengaluru
Subject :NSO    Class : Class 5

Ans 1:

Vishnuteja V from BVBARRS, Hyderabad
Class : Class 6
A - Cocklebur : Dispersed by animalB - Hiptage : Dispersed by windC - Dandelion : Dispersed by windD - Coconut : Dispersed by water

Ans 2:

somesh from Centre point katol road, Nagpur
Class : Class 6
C is dispersed by animals not by explosion

Ans 3:

akshaj das from NARAYANA E TECHNO kaggdaspura, Bengaluru
Class : Class 8

Ans 4:

Aaditva from Vasant Valley School, New Delhi
Class : Class 8
iub9u-jinjbh p8huuhikitmujipy ijogijodigdj;' h/mhykfcx

Ans 5:

Tanishka Laha from Euroschool, Bengaluru
Class : Class 5
Option A shows - Dandelion, dispersed by animals B shows- Lotus seeds, dispersed by water C shows- Xanthium , dispersed by explosion And, D shows- Peas, dispersed by wind.Among these, only option B , which is ' lotus seeds, dispersed by water' is correct, therefore option B is the correct answer.

Ans 6:

Aaditya Gandhi from Heritage Experiential Learning School, Gurgaon
Class : Class 5
bruh

Ans 7:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
By why not (C)?

Ans 8:

shubhavi Dhondge from NPS, Banagalore
Class : Class 9

Ans 9:

Aaditya Malhotra from Isaac Newton Global School, Mumbai
Class : Class 3

Ans 10: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, Option A shows - Dandelion which is dispersed by wind Option B shows - Lotus which is dispersed by water Option C shows - Xanthium which is dispersed by animals Option D shows - Pea which is dispersed by explosion So, the answer is B.

Ans 11:

Aditya Basera from Teoler High School, Jaipur
Class : Class 7
bbbbbbbbbbbbbbbbbbbbbbBBBBBBBBBBBBBBBBBBBBbbbbbbbbbbbb

Ans 12:

bengaluru from DA, Bengaluru
Class : Class 5

Ans 13:

SIDDHARTH KUMAR CHATTERJEE from NAVY CHILDREN SCHOOL , CHICALIM
Class : Class 7
@Ananjit Chander, Because Xanthium is dispersed by animals, not explosions.

Ans 14:

KONDURU TEJESH from Sri chaitanya international school, Bangalore
Class : Class 4
mine every ans is correct but i obtained only 4/5!

Post Your Answer

Gireesha from innocent hearts school jalandhar, Jalandhar
Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is (d). The right hand rule can be used to determine the direction of the force on a current-carrying wire placed in an external magnetic field.

Post Your Answer