National Science Olympiad Forum By SOF Olympiad Trainer

Ashi Goyal from Sacred heart convent school,raikot road,barnala, punjab

Subject :NSO Class : Class 5

Select the correct option regarding the given figure, if alphabet 'P' represents the star at the centre of our solar system.

AIf Q is Mars then the number of R around it will be 2.
BIf Q is Venus then the number of R around it will be 3.
CIf Q is Jupiter, then the number of R around it will be 58.
DIf Q is Neptune, then the number of R around it will be 0.

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Aditya Vijay kumar from Army Public School, Lucknow

Subject :NSO Class : Class 7

Oscillations are set in a simple pendulum whose length is 2 m and mass of the bob is 2 kg. Its time period

A Is always constant
B Increases slowly
C Decreases slowly
D First increases then decreases.

why?

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Ans 1:

PRIYANSHU DEB from New Green Field School, Saket, New Delhi

Class : Class 7

As it is not mentioned whether any specific environment was prepared, assuming it was set in normal environment, the bob's oscillation speed will decrease and time period will thus increase due to air resistance. So shouldn't it be option B?

Ans 2:

ARIHAAN SAMANTA from Springdale High School, KALYANI

Class : Class 7

Ans 3:

Arjun from Sri Kumaran Public School - ICSE, Bengaluru

Class : Class 8

They have not mentioned whether the pendulum is in perpetual motion(Infinitely oscillates without stopping). Therefore, shouldn't the pendulum eventually stop swinging after a while due to resistance? As the amplitude decreases, the period decreases as it travels less. Therefore, I think the answer should be C.

Ans 4:

Arnav Raju Ghungal from Mount Carmel international school akola, mothi lokende layout akola

Class : Class 7

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ARNAV VYAS from d r amin memorial school, VADODARA

Subject :NSO Class : Class 3

In the following four groups of plant parts used as food, one member is odd one out. Select the option in which the odd member is encircled INCORRECTLY?

A Wheat, Maize, , Bajra
B Arhar, , Moong, Rajma
C , Sugarcane, Potato, Ginger
D , Coriander, Methi, Sugarcane

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Ans 1:

Ibrahim Aslam from uttam, Ghaziabad

Class : Class 5

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

Ans 3:

Samarth Arcot Praveen from National Public School Rajajinagar, Bangalore

Class : Class 4

3spinich is an leafy vegetable

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Swastik from st marys school, new delhi

Subject :NSO Class : Class 5

Refer to the given Venn diagram.

Select the correct option regarding P, Q, R, S and T.

AS could be a rose plant whereas P could be a potato plant.
BQ could be Bryophyllum and T could be strawberry.
CR could be a fern or an alga.
DQ could be spinach and P could be colocasia.

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Ans 1:

Devina kashyap from TPS, Mumbai

Class : Class 4

what is the seed of an rose???i have never seen

Ans 2:

Divyanshi from United international School, Bangalore

Class : Class 6

Yeah

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B Krithika sulochana from Devi Academy senior secondary school, Chennai

Subject :NSO Class : Class 8

Study the given correlation.
Heat treatment : Sterilisation : : Vaccination : X
Here, X refers to

A Pasteurisation
B Immunisation
C Fertilisation
D Inoculation.

Sterilisation is the other common term for the process heat treatment likewise the other common term used for vaccination is immunization.

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Ans 1:

Kushi V from Jss Public School, bangalore

Class : Class 8

B. IMMUNIZATION

Ans 2:

Vasanth P from Little Angels, Karur

Class : Class 8

B is the correct option

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Ibrahim Aslam from uttam, Ghaziabad

Subject :NSO Class : Class 3

Study the given flow chart carefully and select the correct option regarding it.

AP could be nylon, R could be rubber.
BS could be rubber, Q could be jute.
CQ could be milk, P could be saffron.
DR could be cotton, S could be rubber.

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Ans 1:

Meghatyoya from Adamas World School , Barasat

Class : Class 3

d

Ans 2:

Naisha Gupta from DPS School, Khajaguda, Hyderabad

Class : Class 3

D

Ans 3:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

Ans 4:

Aarav Adhikary from GlIS, Kuala Lumpur

Class : Class 3

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Ashi Goyal from Sacred heart convent school,raikot road,barnala, punjab

Subject :NSO Class : Class 5

Study the given table and select the incorrect option regarding P, Q, R and S.

AAnimal P is mostly found in moist or aquatic habitat.
BBody covering Q is also found in snake and crocodile.
CAnimal R is generally found in polar regions.
DAnimal S has heavy and solid bones and hindlimbs modified into wings.

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Vidit marwaha from Cambridge international school , Jalandhar

Subject :NSO Class : Class 5

Which of the following statements is incorrect regarding different layers of soil?

A Soil is made up of gravel, sand, humus, water and clay particles.
B Topsoil is rich in organic matter.
C Roots of trees may grow till subsoil.
D Bedrock contains lot of water and humus.

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Ans 1:

SIDDHARTH UPADHYAY from KENDRIYA VIDYALAYA EZHIMALA, KANNUR

Class : Class 4

Ans 2:

Sanskriti Nagar from Rose Bud Academy, khagaria

Class : Class 5

D is the answer

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Ashi Goyal from Sacred heart convent school,raikot road,barnala, punjab

Subject :NSO Class : Class 5

Four burning sticks are placed into different containers P, Q, R and S containing oxygen, carbon dioxide, nitrogen and air respectively. The observations are then noted down. Which of these observations is correct?

--------Container------------------Observation
AP------------------The glowing stick is extinguished immediately.
BQ------------------The glowing stick bursts into flame.
CR------------------The glowing stick bursts into flame.
DS------------------The glowing stick continues to glow for a while.

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vibhu mehrotra from Vidyashilp Academy, bangalore

Subject :NSO Class : Class 7

Mr Roshan, class 11 teacher took various solutions of equal strength and mixed them in different test tubes as shown in the figure.

He asked the students to find the incorrect statement about the given experiment.

ABlue litmus solution turns red in test tubes 1 and 3.
BTurmeric solution turns red in test tube 1.
CChina rose indicator turns dark pink in test tubes 2 and 4.
DPhenolphthalein remains colourless in test tubes 2 and 4.

the answer given at A does not seem correct as solution in 1 will become basic.does any one have any comments?

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