National Science Olympiad Forum By SOF Olympiad Trainer

Agastya Tripathi from dps gurgaon, Gurgaon

Subject :NSO Class : Class 5

Refer to the given figure indicating three types of forces, X, Y and Z and select the incorrect option.

AAn astronaut floats in space due to absence of force Z.
BWhen we use pulley to lift a bucket of water from well (pulling vertically downward) then pulley makes X in opposite direction of Z making it easier to lift the bucket.
CForce Y is responsible for wearing and tearing of tyres of vehicles.
DWe can walk only on those surfaces which offer no Y.

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Ans 1:

Shreyan from Delhi Public School Bangalore East, Bangalore

Class : Class 5

its both b and d

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Pracheta Satapathy from Cygnet Public school, Pune

Subject :NSO Class : Class 5

Madhu was asked to write names of some Rabi crops but she also wrote some Kharif crops. Select the Kharif crops written by Madhu from the following.
Wheat, Rice, Mustard, Maize, Gram

AWheat, mustard, legumes
BRice, maize
CRice, wheat
DMustard, maize, legumes

i think rice, maize and wheat would be the kharif crops that grow during the period of summer season.so the answer options (B) (C) both can be right.

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Ans 1:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru

Class : Class 6

Ans 2:

Aditya Basera from Teoler High School, Jaipur

Class : Class 7

b

Ans 3:

Devansh Devikar from podar international, nagpur

Class : Class 5

ANS Is B One

Ans 4:

from , rajahmundry

Class : Class 2

ANS IS BOTH B AND C

Ans 5:

Suresh Gyanchandani from St. Anselms Pink City Senior Secondary School, Jaipur

Class : Class 5

ans is b yo

Ans 6:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA

Class : Class 7

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akshaj das from NARAYANA E TECHNO kaggdaspura, Bengaluru

Subject :NSO Class : Class 5

Ritu took two bimetallic strips, I and II (of equal size, length and breadth) made up of metals P and Q; and Q and R, respectively as shown here.
She subjected each bimetallic strip to heating for same time period. The given diagram shows her experiment.

Which of the following cannot be inferred from the above experiment?

AMetal P expands more as compared to metals Q and R on heating for the same time period.
BMetal R contracts more as compared to metals P and Q on heating for the same time period.
CThe ascending order of expansion of these metals when subjected to heating is R < Q < P.
DBoth B and C

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Ans 1:

Pratham Dave from GNS, Bangalore

Class : Class 7

In the solutions it is showing A as correct option but it is giving the answer as B.

Ans 2:

P A Reyyansh from Ann Mary School, Dehradun

Class : Class 10

NA

Ans 3:

Sarthak Sidhant from Delhi public school, Bokaro

Class : Class 8

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VIVAAN GARG from KR MANGALAM WORLD SCHOOL, FARIDABAD

Subject :NSO Class : Class 3

The events below show what happens when a seed germinates.
1. The shoot appears.
2. The root appears.
3. The first leaf appears.
4. The seed coat breaks.
Which of the following represents the correct sequence of these events?

A 2, 1, 3, 4
B 2, 1, 4, 3
C 4, 1, 2, 3
D 4, 2, 1, 3

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Ans 1:

Mohi from Vibgyor, Bangalore

Class : Class 6

D should be the correct answer as Root appears before shoot.

Ans 2:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG

Class : Class 3

C

Ans 3:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG

Class : Class 3

C

Ans 4:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

Ans 5:

Shreya Shruti from Airforce school , Bengaluru

Class : Class 8

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VIVAAN GARG from KR MANGALAM WORLD SCHOOL, FARIDABAD

Subject :NSO Class : Class 3

Select the correct option regarding the given figures showing some activities.

A Digestive system is involved in activity 'd'.
B Skeletal and muscular systems are mainly involved in activity 'e'.
C Respiratory system is involved in activity 'f'.
D All of these.

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

Ans 2:

Mohi from Vibgyor, Bangalore

Class : Class 6

D - all of these

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VIVAAN GARG from KR MANGALAM WORLD SCHOOL, FARIDABAD

Subject :NSO Class : Class 3

Study the given diagram carefully.

Which of the leaf/leaves can perform photosynthesis?

A Q only
B R and S
C Q, R and S
D P, Q, R and S

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

B

Ans 2:

Mohi from Vibgyor, Bangalore

Class : Class 6

B. R and S only.

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VIVAAN GARG from KR MANGALAM WORLD SCHOOL, FARIDABAD

Subject :NSO Class : Class 3

The given diagram shows a box being pushed. Identify the three forces, W, X and Y acting on the box.

----------W-------------X--------Y
A Friction-----Push-----Gravity
B Push-----Friction-----Gravity
C Friction-----Gravity-----Push
D Gravity-----Push-----Friction

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Ans 1:

Mohi from Vibgyor, Bangalore

Class : Class 6

B

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

B

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ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Subject :NSO Class : Class 3

A man standing 150 m away from a cliff fires a gun. A second man who is standing 300 m further away from first man hears the gun 1 second after he sees the flash. The second man will hear the echo from the cliff _______.

(A) 1 second after seeing the flash

(B) 2 seconds after hearing the gun

(C) 2 seconds after seeing the flash

(D) 4 seconds after hearing the gun

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

C

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

C

Ans 3:

Amrit Anans from St Anthony, Gorakhpur

Class : Class 3

THIS IS CLASS 8 QUESTION FOOLS

Ans 4:

Mohi from Vibgyor, Bangalore

Class : Class 6

C

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Shayan Bari from Kendriya Vidyalaya, Katihar

Subject :NSO Class : Class 6

Which of the following statements is correct?

A Motion of soldiers on march past is a periodic motion.
B Motion of a train along a curved track on hills is the example of curvilinear motion.
C Every periodic motion is also a oscillatory motion.
D Hockey player running after a ball is a combined motion.

Motion of soldiers is periodic motion, not translatory motion.

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Ans 1:

niuv from meridian, Hyderabad

Class : Class 6

Ans A also is correct as the motion of the soldiers is uniform that is it is periodic. The motion of the hands is also oscillatory which is periodic

Ans 2:

Sof Team from Sof Olympiad Trainer Helpdesk, Bangalore

Class : Class 7

D is also correct the player experiences random motion and because he is running after a ball which is in random motion so he is in random motion too. he also experiences oscillatory motion because while he is running his legs ags are going up and down to the extreme points which are the properties of oscillatory motion.

Ans 3:

somesh from Centre point katol road, Nagpur

Class : Class 6

Ans is D

Ans 4:

Ashwak from Cambridge, Jalandhar

Class : Class 9

THE QUESTION IS WRONG IT SHOULD BE WHICH OF THEM IS INCORRECT

Ans 5:

Soumik Jana from contai public school, contai

Class : Class 6

a,b,d, options are correct

Ans 6:

Raja Satwik Prasad Tetali from DELHI PUBLIC SCHOOL BANGALORE NORTH, Bengaluru

Class : Class 8

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Mohammed Kashif Ahamed from Smt Kamalabai Educational Trust, Bangalore

Subject :NSO Class : Class 5

T he given diagram shows two organs labelled as X and Y. Select a correct option about the difference between these two organs.

(A) Organ Y contains undigested food but organ X contains digested food.

(B) Digested food is absorbed in organ Y but water is absorbed in organ X.

(C) Organ X secretes intestinal juice but organ Y secretes bile juice.

(D) All of these

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Ans 1:

fatimah zahra from Shishya BEML Public School, Bangalore

Class : Class 5

i think it is D

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