National Science Olympiad Forum By SOF Olympiad Trainer

Prashant Singh from ABR Foundation School , Sasaram

Subject :NSO Class : Class 6

Which one of the following is true for all chemical reactions?

AThere is a change in volume
BHeat is evolved
CChemical bonds are broken or formed
DThere is a change in mass

Wrong

Ans 1:

hardik from M.P.V.M, Prayagraj

Class : Class 7

nothing to tell about which experiment

Ans 2:

Ishika patel from reliance foundation school, mumbai

Class : Class 7

How is heat not evolved, as heat is evolved in every chemical change?

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Divyanshi from The Heritage school, Kolkata

Subject :NSO Class : Class 5

Which of the following is not correctly matched?

A
B
C
D

the answer is c

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Suhani from SOI, Bangalore

Subject :NSO Class : Class 6

A few materials are given in the box.
(i) Butter paper (ii) Cellophane sheet
(iii) Window pane (iv) Glass
(v) Water (vi) Air
The transparent materials among these are

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

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Suhani from SOI, Bangalore

Subject :NSO Class : Class 6

Identify the correct statements among the following.
(i) A piece of wood is lighter than water.
(ii) Cotton will float on water if placed on wax paper.
(iii) An equal volume of aluminium will be heavier than iron.
(iv) An iron nail will sink in water.

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

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Aarav Ashmit from Sai Angan, Bhubaneswar

Subject :NSO Class : Class 3

Read the given statements and select the option that correctly identifies true (T) and false (F) ones.
1. People who do more physical work need more carbohydrate-rich food.
2. Minerals help in the formation of bones, teeth and blood.
3. Eating too much of roughage containing food can make you obese.

	1	2	3
A	T	T	T
B	T	T	F
C	F	F	T
D	T	F	T

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Varnika Shrivastava from The Sanskar Valley School, Bhopal

Subject :NSO Class : Class 5

There was a large number of dead fish drifting towards shore. Many dead birds with sticky, black coating feathers could also be seen there. A/An ______ might have occurred nearby.

A Tsunami
B Volcanic eruption
C Oil spill
D Earthquake

in the que it did not show that there was a parge number of dead aquatic animals on animals were written it can be B also as the volcanic eruption erupt from the volcano so it can harm both the animals/birds nd the water too

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Niranjan Mahesh Kadam from RENAISSANCE CBSE SCHOOL, Latur

Subject :NSO Class : Class 7

Natasha arranged four set-ups as given below:

III. Solutions in test tubes 1 and 3, turn red with methyl orange.
IV. With phenolphthalein indicator, solutions turn pink in test tubes 2 and 4.
V. Turmeric solution shows red colour with solutions in test tubes 1 and 3 while yellow colour with solutions in test tubes 2 and 4.

A II, III and IV only
B I, III and V only
C I and V only
D II, III and V only

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Rihansh Gupta from St . Joseph High School , Mumbai

Subject :NSO Class : Class 6

A pendulum swings backwards and forwards passing through Y, middle point of the oscillation.

The first time the pendulum passes through Y, a stopwatch is started.
The twenty-first time the pendulum pass through Y, the stopwatch is stopped. The reading is T.
What is the time period of the pendulum?

A T/40
B T/21
C T/20
D T/10