National Science Olympiad Forum By SOF Olympiad Trainer

Yuvrraj Surana from Witty Internatinal Schol, Udaipur

Subject :NSO Class : Class 4

The given figure shows layers of Earth. Select the correct statement regarding it.

AP and Q are liquid layers.
BLayer above R is called crust.
CLayer S makes up most of the total Earth’s volume.
DAll of these

b

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Ans 1:

Yuvrraj Surana from Witty Internatinal Schol, Udaipur

Class : Class 4

B

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Ashish Kumar Yadav from Sandeepani Ganj kunj , Samsaraj

Subject :NSO Class : Class 6

Different types of sheets are placed between Nisha, Sahil, Ankit and Ruby.
Sheets Q and S allow light to pass through them. Sheets P and R are opaque. Select the incorrect statement among the following.

A Nisha cannot see Sahil.
B Sahil can see Ankit.
C If sheet S is removed then Ruby cannot see Ankit.
D Ankit can see Nisha.

Answer

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Ans 1:

Jyotsna from Prakriya, Bangalore

Class : Class 6

Ankit cannot see Nisha because sheet P, which is in his way, is opaque

Ans 2:

Samanvi Sathyajith from Indian school sohar, Oman

Class : Class 6

The answer is option D

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Sarthak Khanna from GAGAN BHARTI SCHOOL, West Delhi

Subject :NSO Class : Class 6

Study the given table carefully and select the correct option.

A Only air, paper and steel are listed incorrectly.
B Only paper is listed incorrectly.
C Only air, butter paper and wood are listed incorrectly.
D Only glass, water and iron are listed incorrectly.

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Ans 1:

Jyotsna from Prakriya, Bangalore

Class : Class 6

Option A is correct because air is transparent, paper is translucent, and steel is opaque

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Arya awasthi from Dps, Raipur

Subject :NSO Class : Class 5

Greenhouse gases cause global warming. Which of the following is a greenhouse gas?

AOxygen
BNitrogen
CCarbon dioxide
DMagnesium oxide

VERY BAD BECAUSE THERE WAS BLOCKge in options

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Ans 1:

AISHI ROY from DELHI PUBLIC SCHOOL NAVA RAIPUR, NAVA RAIPUR

Class : Class 5

Carbon dioxide

Ans 2:

DESU NAITHIKESWAR REDDY from Ravindra Bharathi Next Gen, Thulasi Nagar Vijayawada

Class : Class 5

C

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Lakshya Ajay Kawade from Holy Cross Kapa , Raipur

Subject :NSO Class : Class 8

Which of the following mirrors is/are used in solar cooker?

APlane mirrors
BConcave mirrors
CConvex mirrors
DBoth A and B

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Bhava Sphuran from N.St .Mathew's Public School, Vijayawada

Class : Class 9

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ANURAG ANAND from SURENDRANATH CENTENARY SCHOOL, RANCHI

Subject :NSO Class : Class 10

A stream of electrons is projected horizontally to the left. A straight current carrying conductor is supported parallel to the electron stream and above it. If the current in the conductor is flowing from left to right then, what will be the effect on the electron stream ?

AThe stream of electrons will be pulled upwards.
BThe stream of electrons will be pushed downwards.
CThe stream of electrons will be retarded.
DThe stream of electrons will speed up towards the right.

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Shreyasi Padihary from The Cambridge International School , Bangalore

Subject :NSO Class : Class 5

Refer to the given classification chart and select the option that correctly identifies any three among V-Y.

AV-Strawberry, W-Ginger, X-Mushroom
BV-Sweet potato, X-Fern, Y-Bryophyllum
CV-Garlic, W-Dandelion, Y-Hibiscus
DV-Dahlia, W-Moss, X-Begonia

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Aadya Dholaria from Elpro International School, Pune

Class : Class 5

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Subhang Deep Sahu from Chrysalis High Kadugodi . , Bangalore

Subject :NSO Class : Class 6

Refer to the given pie chart showing nutrients P, Q, R and S present in different foods and identify the correct statements regarding them.

(i) Food rich in P is taken by sportspersons which provides them with instant energy and it turns blue-black in colour on adding iodine solution.
(ii) S helps in retaining water in the body and maintains healthy bowel movement.
(iii) S is important for growth and repair of body tissues thus, required in more amount in person recovering from accident injuries.
(iv) R forms antibodies in the body and its deficiency causes marasmus characterised by dry and rough hair, swollen stomach and mental retardation in children.
(v) Food sample containing Q turns into purple or violet colour when treated with 2 drops of copper sulphate and sodium hydroxide solution.

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

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Ans 1:

Jyotsna from Prakriya, Bangalore

Class : Class 6

Option C

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Sarthak Khanna from GAGAN BHARTI SCHOOL, West Delhi

Subject :NSO Class : Class 6

Study the given Venn diagram carefully.

Centre point represents

ACondensation
BFreezing
CMelting
DBoth A and B.

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Ans 1:

SURYAKANTA MAHALIK from SAI International Scool, Bhubaneswar

Class : Class 6

Ans 2:

Sarthak Khanna from GAGAN BHARTI SCHOOL, West Delhi

Class : Class 6

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Nishkarsh Sharma from Podar International School, Ahmedabad

Subject :NSO Class : Class 5

Five friends ate some dishes in the lunch as shown in the given table.

Refer to the given table and select the option that correctly answers the following questions.
(A) Who among them had a balanced meal?
(B) Who among them ate only body building food?
(C) Who among them ate only protective food?
A-----B-----C

AMonica---Arhan---Gauri
BArhan---Manav---Hitesh
CMonica---Hitesh---Arhan
DHitesh---Arhan---Manav

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