National Science Olympiad Forum By SOF Olympiad Trainer

Atharv salokhe from Tatyasaheb kore english academy, Warananagar

Subject :NSO Class : Class 9

A scooterist moving with a speed of 36 km h^-1 sees a child standing in the middle of the road. He applies the brakes and brings the scooter to rest in 5 s just in time to save child. If mass of the scooter and driver is 300 kg, the average retarding force on the scooter is

A6 × 10⁷ g cm s^-2
B6 × 10⁴ g m s^-2
C6 × 10⁵ kg cm s^-2
D6 × 10³ kg m s^-2

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Ans 1:

Shivam from Modern public school, Alwar

Class : Class 9

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Raksheet Shah from Swami Vivekanad International School, Mumbai

Subject :NSO Class : Class 5

There is a certain relationship between the pair of letters given on either side of : :. Identify the relationship of the first pair and find the missing term of the second pair.
ACG : DHJ : : PRV
A SYW
B WSY
C SZW
D SWY

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AARNA Kapse from The swaminarayan school, Nagpur

Subject :NSO Class : Class 3

Match the columns and select the correct option.

Beak	Bird
(A) Short, hard and pointed	(1) Duck
(B) Long and pointed	(2) Humming bird
(C) Strong and hooked beak	(3) Pigeon
Broad and flat	(4) Sparrow
	(5) Parrot
	(6) Crane

Aa-3; b-1, 6; c-4; d-2, 5
Ba-4; b-3, 6; c-1; d-2, 5
Ca-3, 4; b-2,6; c-5; d-1
Da-2, 6; b-1; c-5; d-3, 4

No correct answer is "OPTION D"

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Ans 1:

Arihant Medhi from Dps Barasat, Kolkata

Class : Class 7

Sparrow has short and broad beak.Correct A

Ans 2:

Priyanshi Pritam from Vibgyor High, Bangalore

Class : Class 4

correct ans is c

Ans 3:

Santina Suzanne from owis, bangalore

Class : Class 3

it it is very hard

Ans 4:

Sia Parekh from Pawar Public School, Mumbai

Class : Class 7

Yes correct answer is C.

Ans 5:

Sia Parekh from Pawar Public School, Mumbai

Class : Class 7

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Kartik Chauhan from Euro school , Pune

Subject :NSO Class : Class 7

Which of the following options is correct for the object having a straight line motion represented by the graph shown in figure?

(a) The object moves with constantly increasing velocity from O to A and then it moves with constant velocity.
(b) Velocity of the object increases uniformly.
(c) Average velocity is zero.
(d) The graph shown is impossible.

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GAURISHA from MVN, Faridabad

Subject :NSO Class : Class 5

Find the value of P, Q, R and S respectively.

A
B
C
D

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Ans 1:

Akanksha Mohapatro from DPS Bangalore North, Bangalore

Class : Class 5

Ans 2:

Shreyansh Gupta from MVN, faridabad

Class : Class 6

dfgfvnjkunfhgcfdcfdcdfvdfxvdfvdvdv full out of full horray

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Shayan Bari from Kendriya Vidyalaya, Katihar

Subject :NSO Class : Class 3

Which of the following telephone services is used within a country ?

ASTD
BLocal
CISD
DNone of these

Both STD and Local is used within a country

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Ans 1:

Shayan Bari from Kendriya Vidyalaya, Katihar

Class : Class 7

Bot STD and Local is used within a country.

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Dhruvan G from Indian School al Ghubra, Muscat

Subject :NSO Class : Class 9

Which of the following statement regarding apical meristem is incorrect?

A It brings about increase in length of the root and stem.
B It develops by dedifferentiation of permanent tissues.
C It constitutes primary meristem.
D None of these

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

B

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Shourya Kumar from Delhi Public School Noida, Noida

Subject :NSO Class : Class 6

Read the given statements and mark the correct option.
Statement 1 : While fixing a metal rim on a wooden wheel of a cart, the size of the metal rim is kept slightly smaller than that of the wooden wheel.
Statement 2 : Metals expand on heating and contract on cooling.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of
statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.

metal rim is kept slightly larger than the wheel not smaller

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Ans 1:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR

Class : Class 10

charvi, statement one is true as aafter fixing on wood , matel needs to contract to get tighterhence , the size is slightly smalle than wood

Ans 2:

Tanmay Chaudhary from MIET public school, MEERUT

Class : Class 7

Ans 3:

Veera Kothari from sanjivani academy , kopargaon

Class : Class 3

it can be kept both smaller and larger than wheel as metals expand on heating and contract on cooling

Ans 4:

Nitya Dey from DPS, VINDHYANAGAR

Class : Class 9

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Ayush from tisb, Bangalore

Subject :NSO Class : Class 6

Select a figure from the options in which Fig. (X) is embedded as one of its part.

A
B
C
D

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Dhruvan G from Indian School al Ghubra, Muscat

Subject :NSO Class : Class 9

Which of the following conditions will give the most benefits to the farmers?

A Use of high quality seeds, fertilisers and no irrigation
B Use of high quality seeds, irrigation, use of fertilisers and crop protection measures
C Use of ordinary seeds, irrigation and use of fertilisers
D Use of high quality seeds, irrigation, excessive use of chemical fertilisers and crop protection measures

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

B

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