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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.


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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:

Shreeya Mangla from ASN Senior Secondary School, New Delhi
Class : Class 8
Snake, lizard and fish have scales as body covering while rhinoceros doesn't. Hence the correct answer is C

Ans 3:

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

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The correct answer is CRhinoceros does not have scales on body

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The correct answer is CRhinoceros does not have scales on body while snake, lizard and fish have scales as body covering

Ans 6:

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

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:

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 9:

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

Ans 10:

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

Ans 11:

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 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:

arulmozhi ramesh from Kv, Coimbatore
Class : Class 9

Ans 14:

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

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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

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

Ans 1:

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

Ans 2:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh
Class : Class 7
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 3:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh
Class : Class 7
GIMME GIMME THE ANS

Ans 4: (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 5:

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 6:

Ashwak from Cambridge, Jalandhar
Class : Class 8
I agree with ARUNAV

Ans 7:

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

Ans 8:

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 9:

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

Ans 10:

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

Ans 11:

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

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

Ans 1:

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

Ans 2: (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.

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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

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

Ans 1:

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

Ans 2:

Aditya Basera from Teoler High School, Jaipur
Class : Class 7
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Ans 3:

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 4:

Anantjit Chander from The Modern School, Sector 85, Greater Faridabad, Faridabad
Class : Class 9
By why not (C)?

Ans 5:

Aaditva from Vasant Valley School, New Delhi
Class : Class 7
iub9u-jinjbh p8huuhikitmujipy ijogijodigdj;' h/mhykfcx

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9: (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 10:

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

Ans 11:

shubhavi Dhondge from NPS, Banagalore
Class : Class 9

Ans 12:

bengaluru from , Bengaluru
Class : Class 4

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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.

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Pratik parv from Apeejay international school greater Noida, Greater Noida
Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Kindly mention your query

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ved surushe from Royal International School, DOMBIVLI
Subject :NSO    Class : Class 8
hi

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Kindly mention your query

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