National Science Olympiad Forum By SOF Olympiad Trainer

Jayendra Singh Jasrotia from Jodhamal Public School, Jammu, Jammu

Subject :NSO Class : Class 3

Megha is standing in a line. She is the fourth person from the front and thirteenth person from the back. How many persons are there in the line?

A 14
B 15
C 16
D 17

Correct answer is A.

Ans 1:

karthik from royale concorde, bangalore

Class : Class 3

c

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Aaditya Malhotra from Isaac Newton Global School, Mumbai

Subject :NSO Class : Class 5

Which of the following groups of animals does not possess vertebral column?

A
B
C
D

Ans 1:

Aaditya Malhotra from Isaac Newton Global School, Mumbai

Class : Class 3

error

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Havi Jain from GEMS modern academy, Gurgaon

Subject :NSO Class : Class 3

Select the symbol that indicate the weather in which we need to wear both the objects shown in the box.

A
B
C
D

D

Ans 1:

Sidratul Muntaha from Indian school Muladha, Muladha

Class : Class 5

D because snow is falling in that picture.

Ans 2:

Ram Prasanna from Basil Woods International, Hyderabad

Class : Class 3

The correct answer is d but they say it is worng

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likith from Delhi Public School International School, Singapore

Subject :NSO Class : Class 6

Which of the following is/are correctly matched?

(i)	Process by which waste materials are used to make new products	Recycling
(ii)	Large open areas used for solid waste disposal	Landfills
(iii)	Biomedical waste	Incineration

A(i) and (ii) only
B(ii) only
C(i), (ii) and (iii)
D(iii) only

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AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM

Subject :NSO Class : Class 7

A mirror can form images but a plane glass slab cannot. This is because a mirror

AReflects light while a plane glass slab absorbs light
BRefracts light while a plane glass slab reflects light
CReflects light while a plane glass slab refracts light
DRefracts light while a plane glass slab absorbs light.

ANSWER IS C.

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Ans 1:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM

Class : Class 10

ANSWER IS C.

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Rudranshu Mishra from Allen, Kota

Subject :NSO Class : Class 7

In the graph, O to C represents a moving body. Which of the following is correct for the motion along BC ?

A Forward with uniform velocity.
B Backward with non-uniform velocity.
C Backward with uniform velocity.
D Forward with non-uniform velocity.

Explain it please

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Ans 1:

manav kedia from Glendale Academy, hyderabad

Class : Class 8

Ans 2:

Derek from Arsha vidya Mandir, Chennai

Class : Class 7

Whenever the displacement decreases with increase in time the velocity will also decrease with time and will not be uniform. This is a displacement time graph not a distance time graph

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Daiwik from DPS, Doha

Subject :NSO Class : Class 7

In column I, three identical lamps P, Q and R are arranged in different configurations, while in column II the information about brightness of lamps are mentioned. Match column I with column II and select the correct option from the given codes. (Neglect resistance of connecting wires)

A (i) → (A, C), (ii) → (A), (iii) → (B, C), (iv) → (C, D)
B (i) → (C, D), (ii) → (B), (iii) → (B, D), (iv) → (A, B)
C (i) → (A), (ii) → (C, D), (iii) → (B, C), (iv) → (B)
D (i) → (B, D), (ii) → (C), (iii) → (B, C), (iv) → (A)

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Ans 1:

Daiwik from DPS, Doha

Class : Class 7

this is hard.....

Ans 2:

Sidharth R Oleti from National Public School HSR, Bangalore

Class : Class 8

Ans 3:

Geetha Bhanu Sri from Cornerstone public school, hyderabad

Class : Class 7

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Nishant Hazarika from Air Force School, Dibrugarh

Subject :NSO Class : Class 3

Refer to the given figure. What will be formed as the result of the process shown here?

A Humus
B Soil
C Air
D None of these

Very tricky

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Ans 1:

Ronaldo from Dps, New Delhi

Class : Class 7

Answer is option B

Ans 2:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS

Class : Class 8

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Eklavya Gondule from DPS Bhilai, BHILAI

Subject :NSO Class : Class 3

Select the option which on unscrambling gives the name of dark coloured nutrient rich component of soil.

A VRAEGL
B MUUSH
C ANSD
D YLAC

View All Answers (4)

Ans 1:

Amarjit Pattanaik from sainik school, Chennai

Class : Class 6

The answer is B. humus

Ans 2:

AARNA GARG from bethany high school, Bangalore

Class : Class 4

b.humus

Ans 3:

Haanish Haaranngga M P from Parampara Academy, Arakkonam

Class : Class 6

Ans 4:

Arihant Medhi from Dps Barasat, Kolkata

Class : Class 8

The correct answer is B,humus

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Eklavya Gondule from DPS Bhilai, BHILAI

Subject :NSO Class : Class 3

Match the column I with column II and select the correct option.

--Column I	Column II
(A) Noise pollution	1. Bathing in rivers with soap
(B) Air pollution	2. Factory chimneys
(C) Water pollution	3. Burning wood
	4. Unnecessary blowing horns
	5. Throwing untreated waste in water bodies

A (A)-2,3; (B)-5; (C)-4,1
B (A)-1,5; (B)-2,3; (C)-4
C (A)-4; (B)-2,3; (C)-1,5
D (A)-4; (B)-1,5; (C)-2,3

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