National Science Olympiad Forum By SOF Olympiad Trainer

Deepak Maniganda from KV Mysuru, Mysuru

Subject :NSO Class : Class 10

Study the following letter-number arrangement and answer the question given below :
B84CRM9PDKWFA2EJ7XUQHLTY6GSL
If the first half of the above arrangement is written in reverse order followed by the second half-written in reverse order, which letter/number will be eighteenth from left?

(a) Y
(b) K
(c) 7
(d) 6

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Ronav Kerkar from Jamnabai Narsee School, Mumbai

Subject :NSO Class : Class 4

Find the mirror image of Fig. (X), if the mirror is placed vertically to the left.

A
B
C
D

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is option C.

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Ronav Kerkar from Jamnabai Narsee School, Mumbai

Subject :NSO Class : Class 4

Refer to the given conversation among three friends.

Now, select the most suitable option regarding X, Y and Z.

AX can be cardboard.
BY can be plastic.
CZ can be steel.
DY can be cotton.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

D

Sunita needs a waterproof container to carry water, so X cannot be a cardboard. Pihu needs a sheet to absorb oil, so Y cannot be plastic as it cannot absorb oil. Rahul needs a box made up of a material that is a bad conductor of heat, so it cannot be steel.
Y can be cotton as it will absorb the oil.

Ans 2:

jathin from national public school chikkabanavara, banglore

Class : Class 4

CORRECT ANSWER IS D

Ans 3:

Samvita Patil from NHVPS, Bangalore

Class : Class 5

steel is actually a good conducter and lets ice melt but here in the solution they have given wrong as they have written it as steel in a bad conducter of heat.

Ans 4:

Vihaan from Dhirubhai Ambani International School, Mumbai

Class : Class 4

The correct ans is D. :-)

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Adithi Keshava from National Center For Excellence , Bangalore

Subject :NSO Class : Class 6

Which soil is best suited for plant growth?

ASandy soil
BClayey soil
CLoamy soil
DAll of these

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

C

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Adithi Keshava from National Center For Excellence , Bangalore

Subject :NSO Class : Class 6

Which of the following adaptations are shown by given plant?


(i)    Hollow stems and poorly developed roots.
(ii)   Branches are cone-shaped and slanting.
(iii) Large and flat floating leaves with waxy upper surface.
(iv) Stem performs photosynthesis.
(v) Succulent and swollen stems to store water.

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

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Ans 1:

Kavitharini Joseph from HUS, Chennai

Class : Class 6

ki

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Mann Kumar from C.M.S RDSO school, Lucknow

Subject :NSO Class : Class 7

What genitic disease is caused by dysfunction Of the 13th chromosome?

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

Patau syndrome

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Shreya from RFS, Navimumbai

Subject :NSO Class : Class 9

Four students were given small pieces of materials P, Q, R and S respectively. They observed the reactions of these materials as follows :

According to them, materials P, Q, R and S respectively are

AFe, Cu, Na, P
BNa, Fe, P, Cu
CP, Fe, Na, Cu
DCu, P, Na, Fe

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PRIYA from Shri O.P. Jindal Vidya Niketan, Mundra

Class : Class 10

C

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Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi

Subject :NSO Class : Class 7

The given figures (X), (Y) & (Z) show a sequence of folding of a piece of paper. Figure (Z) shows the manner in which the folded paper has been cut. Select the unfolded form of piece of paper from the given options.

A
B
C
D

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NIRANJAN A from national public school, NAMAKKAL

Class : Class 7

c

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SIDDHARTH SOMANI from Vibgyor High, Mumbai

Subject :NSO Class : Class 3

Refer to the given Venn diagram and select the correct option regarding it.

AX may have long and pointed beak whereas Y may have broad and short beak.
BY is a herbivorous bird whereas Z is an omnivorous bird.
CZ collects pebbles and stones to make a nest on the ground.
DY uses its beak like a needle to sew leaves together to build nest.

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Ans 1:

Darsh Dudhia from st Kabir school drive in old branch, ahmedabad

Class : Class 5

Not a meaningful solution

Ans 2:

AADYA TANDON from DPS NOIDA SEC-30, Noida

Class : Class 5

Yes

Ans 3:

Kashika Goel from DPS Noida, Noida

Class : Class 7

in option C, it says that Z collects pebbles and stones to make its nest. Penguins make their nests using pebbles and stones. Penguins also have webbed feet as they are swimming birds so C is correct