National Science Olympiad Forum By SOF Olympiad Trainer

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Subject :NSO Class : Class 4

Based on nutrients, select the option in which the odd one is encircled correctly.

A Meat, , Fish
B , Butter, Oil
C Potato, , Bread
D Beetroot, , Red meat

Ans 1:

Elisha Kannojia from Delhi Public School, Noida

Class : Class 5

Ans 2:

namrata maheshwari from euroschool, airoli

Class : Class 9

i am lipi sanwal from S.H.I.S , GURUGRAMat first I reported a error in the question but after wards I understood iiiiiiiiittttt !

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Shivangi singh from Dps greater Noida, Greater Noida

Subject :NSO Class : Class 3

Read the given statement regarding soil X and select the correct statement regarding it. Soil X is sticky, it can hold a lot of water and there is very little space for air between the particles.

AMost plants grow well in it.
BIt is used to make toys, flower pots, idols, etc.
CIt is a mixture of sand and clay.
DIt is mostly found on the seashore and in the desert.

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Ans 1:

Aditya from DAYAWATI MODI INTERNATIONAL, MEERUT

Class : Class 3

C

Ans 2:

Aditya from DAYAWATI MODI INTERNATIONAL, MEERUT

Class : Class 3

C

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student from school, city

Subject :NSO Class : Class 6

Sugar can be separated from its solution because

A Mixing of sugar in water is a permanent change
B Mixing of sugar in water is an exothermic process
C Mixing of sugar in water is a change that can be reversed by evaporation
D Mixing of sugar in water is a change that can be reversed by filtration.

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Ans 1:

Anusuya Rangasamy from EISB, Bengaluru

Class : Class 6

the correct option is 'C' BECAUSE SUGAR IS A SOLID SO WHEN THE LIQUID IS HEATED IT EVAPORATES LEAVING THE SUGAR BEHIND

Ans 2:

Pratheek from Null, Null

Class : Class 4

Option C

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student from school, city

Subject :NSO Class : Class 6

Observe the given figure carefully and select the correct statement.

AProcesses P and R are exothermic.
BProcesses S and R are exothermic.
CProcesses S and R are endothermic.
DProcesses P and Q are endothermic.

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Ans 1:

from VBPS, Noida

Class : Class 7

Ans 2:

Anoop Haridas from dpsmis doha, doha

Class : Class 8

C is the answer, as in each of these processes, the heat is absorbed.

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Sarthak Sen from Harvest, Bangalore

Subject :NSO Class : Class 5

Which body parts act as the fulcrums of levers?

A Muscles
B Bones
C Joints
D Tendons

g7ggygyg

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Ans 1:

Sarthak Sen from Harvest, Bangalore

Class : Class 5

i think correct answer is C

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Ajay Singh from Kendriya Vidyalaya Khanapara, Guwahati

Subject :NSO Class : Class 3

Study the diagram shown below which shows X, Y and Z as three states of water. Which arrows, K, L, M or N, represent the processes of freezing and boiling?

	Freezing	Boiling
A	K	M
B	K	L
C	M	N
D	N	M

WHY THIS QUESTION ANSWERS C

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Ans 1:

Vaishnavi Harish Iyer from Vikhe Patil Memorial School, Pune

Class : Class 8

Ans 2:

SIDDHARTH SOMANI from Vibgyor High, Mumbai

Class : Class 5

Ans 3:

Shibani Pal from cghs, Kolkata

Class : Class 3

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Unnath from Sentia, Hyderabad

Subject :NSO Class : Class 8

Earthquakes at two places A and B were measured by a seismograph which recorded the magnitude as 2 and 4. The magnitude of tremors and the destructive energy at A and B can be compared as

A Tremors at B are two times those at place A
B Tremors at B are four times those at place A
C Tremors at B are 100 times those at place A
D Tremors at B are 1000 times those at place A.

pls tell how to calculate

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Ans 1:

Unnath from Sentia, Hyderabad

Class : Class 8

C as the scale is 1:0.05

Ans 2:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon

Class : Class 7

Please refer to the Ncert Book, the answer option D is favoured there

Ans 3:

from Bhandari Public School, KHANDWA

Class : Class 9

Ans 4:

Divij Narang from ,

Class : Class 9

Ans 5:

Sainyam Sharma from Thakur Public School, Mumbai

Class : Class 8

1000

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Triguna from Kendriya Vidyalaya No.1 Salt Lake, Kolkata

Subject :NSO Class : Class 8

The given table represents the properties and uses of a few plastics.

The plastics represented incorrectly are

A I and IV only
B I and III only
C II and III only
D I, III and V only.

Wrong answer ... How can bakelite be thermoplastic?

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Ans 1:

Sanjeev Kumar from Mount Litera Zee School, Jhansi

Class : Class 8

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AYUSH MANDAL from SALTBROOK SCHOOL, DIBRUGARH

Subject :NSO Class : Class 9

Kepler's third law states that square of period of revolution (T) of a planet around the sun is proportional to third power of average distance r between the sun and the planet i.e. T² = Kr³ (here K is constant). If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation, force of attraction between them is F = GMm/r², here G is gravitational constant.
The relation between G and K is described as

A K = G
B K = 1/G
C GK = 4π²
D GMK = 4π²

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Ans 1:

Ankur Kumar from Delhi Public School, Ranchi

Class : Class 9

Correct ans:D. The gravitational force is equal to the centripetal force acting between the Sun and Planet. GMm/r^2=Mv^2/r =>v^2=Gm/r. Also,T=2(pi)r/v. Squaring both the sides we will get

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from , Nanded

Subject :NSO Class : Class 9

Direction : Refer to the given dichotomous key regarding cell organelles and answer the questions 49 and 50.

AP can be ER and Q can be Golgi apparatus.
BR can be chloroplasts and S can be ribosomes.
CP can be nucleus and T can be ribosomes.
DR can be mitochondria and S can be lysosomes.

The above question has 2 correct answers C and D.

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