National Science Olympiad Forum By SOF Olympiad Trainer - Page 590

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
mechanical,kinetic (c)

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5
actually it is written wrong

Ans 4:

Class : Class 5
Its option (c), mechanical into kinetic

Ans 5:

Class : Class 7
Mechanical into kinetic energy.

Ans 6:

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

Ans 7:

Class : Class 5
c

Ans 8:

Class : Class 5
c

Ans 9:

Class : Class 5
mechanical into kinectic

Ans 10:

Class : Class 1
Wanna explain why?

Ans 11:

Class : Class 5
c

Ans 12:

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

Ans 13:

Class : Class 7
C.Mechanical, Kinetic

Ans 14:

Class : Class 9
Mechanical,kinetic

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Subject :NSO    Class : Class 2

Ans 1:

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

Ans 2:

Class : Class 6

Ans 3:

Class : Class 1
The correct answer is d.

Ans 4:

Class : Class 5
D;none of these

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

The correct answer is A.


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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

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 2:

Class : Class 9

Ans 3:

Class : Class 1
Google says lizards have scales.

Ans 4:

Class : Class 7
Correct is c because rhino does not have scales while others do

Ans 5:

Class : Class 9
The correct answer is CRhinoceros does not have scales on body

Ans 6:

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 7:

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 8:

Class : Class 4
Do lizards really have scales? I don't think so.

Ans 9:

Class : Class 9
Snake, lizard and fish have scales as body covering while rhinoceros doesn't. Hence the correct answer is C

Ans 10:

Class : Class 5
Ans is C

Ans 11:

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 12:

Class : Class 5
I ticked the answer as D because fish have gills but the others dont

Ans 13:

Class : Class 9
Snakes can peel their skin of while the others can’t

Ans 14:

Class : Class 1
Only this question I got wrong

Ans 15:

Class : Class 5
I chose snake too, so Biju Pappachan and Arumolzhi Ramesh, I have the same thought process- it sheds its skin.

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
I agree with ARUNAV

Ans 2: (Master Answer)

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 3:

Class : Class 7

Ans 4:

Class : Class 7
the ans is b

Ans 5:

Class : Class 8
GIMME GIMME THE ANS

Ans 6:

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

Ans 7:

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 8:

Class : Class 1

Ans 9:

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 10:

Class : Class 9
amoeba divides itself it does not lay eggs. they all lACK A BACKBONE

Ans 11:

Class : Class 8
ans is b

Ans 12:

Class : Class 6
AND THE ANSWER IS AND THE ANSWER IS (A) MULLBERRY as the other three have all the four whorls

Ans 13:

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!!!!!!!!!!!!

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Subject :NSO    Class : Class 10

Ans 1:

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)

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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Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

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:

Class : Class 5
Option D

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

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 2:

Class : Class 3

Ans 3:

Class : Class 6
A - Cocklebur : Dispersed by animalB - Hiptage : Dispersed by windC - Dandelion : Dispersed by windD - Coconut : Dispersed by water

Ans 4:

Class : Class 8

Ans 5:

Class : Class 4
mine every ans is correct but i obtained only 4/5!

Ans 6:

Class : Class 10
By why not (C)?

Ans 7:

Class : Class 7
@Ananjit Chander, Because Xanthium is dispersed by animals, not explosions.

Ans 8:

Class : Class 8
iub9u-jinjbh p8huuhikitmujipy ijogijodigdj;' h/mhykfcx

Ans 9:

Class : Class 6
C is dispersed by animals not by explosion

Ans 10:

Class : Class 5
bruh

Ans 11:

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 12:

Class : Class 5

Ans 13:

Class : Class 9

Ans 14:

Class : Class 7
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Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

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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