National Science Olympiad Forum By SOF Olympiad Trainer

naman from PSBBM, Chennai

Subject :NSO Class : Class 5

The table below shows some properties of four different substances from the kitchen. They are mixed together in a bowl.

Substance

Colour

Dissolves in water

Passes through fine sieve

W

Green

No

No

X

White

No

No

Y

White

Yes

No

Z

White

Yes

Yes

Which of the following is the best way to separate the substances ?

(A) Pour water into the bowl and remove W and X

(B) Pick out the green substance and pour water into the remaining mixture

(C) Pick out the green substance to get W, pour water into the bowl to get X, and heat the remaining solution to get Y

(D) Pick out the green substance, put the remaining mixture into a sieve to get Z, pour water over the remaining substances in the bowl to filter X, and heat the remaining solution to get Y.

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

Using the experiment and answer.
Raghav is using water, sugar, and a balance scale. He is mixing different measured amounts of sugar with 15 grams of water and then measuring the mass of the final solution.

Which of these best states what Raghav is trying to prove?

(A) Sugar and water can be mixed

(B) The mass of a solution is equal to the sum of the masses mixed

(C) The mass of the solution is equal to the mass of the solute subtracted from the mass of the solvent

(D) The mass of a solution depends on the solvent, not on the solute.

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

Which of the following is potable water ?

(A) A glass of water fit for drinking

(B) Water in a pot

(C) Sea water

(D) Water with bacteria and chemicals.

Ans 1:

Ashher Pervez from DPS Bhilai, Bhilai

Class : Class 10

A glass of water fit for drinking

Ans 2:

Ashher Pervez from DPS Bhilai, Bhilai

Class : Class 10

A glass of water fit for drinking

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

Which of the following gives the correct definition of matter ?

(A) Anything that has temperature and takes up space

(B) Anything that has mass and occupy space

(C) Anything that has colour and takes up space

(D) Anything that can flow.

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

Which would be the best material to use, while making the handle of a tea kettle?

(A) Aluminium

(B) Wood

(C) Glass

(D) Iron.

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

Identify the incorrect statement from the following.

(A) Matter exists in three forms

(B) Matter can be changed from one form to another

(C) A new substance is formed in a chemical change

(D) Ice is heavier than water.

Ans 1:

Supreet Birdi from Global Indian International School, Bangalore

Class : Class 9

ice is not heavier than water.

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

In a small town, a number of new water pumps, concrete houses and new roads were constructed. The water table of that place will

(A) Get lower

(B) Get higher

(C) Remain unaffected

(D) None of these.

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naman from PSBBM, Chennai

Subject :NSO Class : Class 5

select the correct statement from the following ; A) Milky way is only spiral shaped galaxy in the universe. B) Planets Venus is the hottest planet of our solar system. C) Satellites like Moon are small heavenly bodies hat revolve around the Sun. D) A solar system consist of 363 days.

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Ans 1:

Gauri Singh from St. John's School, Marhauli, Varanasi

Class : Class 10

option B is correct

Ans 2:

Ashher Pervez from DPS Bhilai, Bhilai

Class : Class 10

B is correct because venus is the hottest planet of our solar system.

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from ,

Subject :NSO Class : Class 5

What is it called when heat is transferred through a liquid or a gas?

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bhargav balaji from National Public School, Bengaluru

Subject :NSO Class : Class 4

What is incorrect about the parade?

(A) In a parade, six platoons march behind the leader

(B) Thirty-six commands have to be given during the entire parade

(C) Commands are given in a very loud voice

(D) The voice should reach the spectators sitting on the other side of the ground.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

Substance	Colour	Dissolves in water	Passes through fine sieve
W	Green	No	No
X	White	No	No
Y	White	Yes	No
Z	White	Yes	Yes

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Ans 1: (Master Answer)