National Science Olympiad Forum By SOF Olympiad Trainer

Sargah Surya from bgsnps, Bengaluru

Subject :NSO Class : Class 7

Can white clothes be worn in winter? One of the MTG books refer that it is not a bad option to wear white clothes, as it is a bad radiator and absorber and will not let heat radiate from body. Ch 1 heat and its effect please confirm

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Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi

Class : Class 8

Actually, black or darker clothes absorb more heat as compared to whiter clothes, so they should be preferably be worn in winter as compared to bright or white clothes.

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AARNA Kapse from The swaminarayan school, Nagpur

Subject :NSO Class : Class 3

Select the correct statement.

A The tiny grains that make up a rock are called minerals and there are always more than one mineral in a rock.
B Sandstone is the hardest rock while granite is the softest rock.
C Rocks break under the effect of sun, wind, water etc. and form humus that makes soil productive.
D Talc is the softest mineral while diamond is the hardest mineral.

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Ans 1:

Hargun Wadhwa from Manav Rachna International School, Sector 46 Gurgaon

Class : Class 4

option c is the correct option because granite and marble are hard to make the floor and cannot break easily but chalk can break easily.

Ans 2:

Eklavya Gondule from DPS Bhilai, BHILAI

Class : Class 7

Ans 3:

Arihant Medhi from Dps Barasat, Kolkata

Class : Class 8

The correct answer is D

Ans 4:

samarth kshatriya from delhi public school,bhilai, bhilai

Class : Class 3

c

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Siddharth Laxmisha from The Study Lecole Internationale, PUDUCHERRY

Subject :NSO Class : Class 3

S

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Dahyalal Solanki from Bengali education society , Mumbai

Subject :NSO Class : Class 6

When I will get the result of NSO second level.

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Priya Lalwani from Sophia Sr Sec School, Bikaner

Subject :NSO Class : Class 9

Study the given Venn diagram carefully.

Which of the following colloidal systems correctly represent points 1, 2 and 3?

	1	2	3
A	Mist	Whipped cream	Dust fumes
B	Milk	Hair cream	Pumice stone
C	Paints	Smoke	Cloud
D	Coloured glasses	Wings of butterflies	Butter

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Ans 1:

from dpsgv, ghaziabad

Class : Class 9

it can be d also

Ans 2:

Aman Jha from Arvind Academy, Lucknow

Class : Class 10

C

Ans 3:

siddharth from saint joseph school, bhagalpur

Class : Class 9

c

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Priya Lalwani from Sophia Sr Sec School, Bikaner

Subject :NSO Class : Class 9

Ms Mehta, a science teacher gave different mixtures to four groups of students to separate their components. Which group was not following the correct method?

A Group 1 was separating a mixture of ethyl alcohol and water by using separating funnel.
B Group 2 was separating a mixture of ammonium chloride and sodium chloride using sublimation.
C Group 3 was separating a mixture of iron pins and sand by using a magnet.
D Group 4 was separating mud particles suspended in water using sedimentation and decantation.

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Aarohi Verma from Deens Academy, Bangalore

Subject :NSO Class : Class 2

Names of four types of house are hidden in the given puzzle. Solve the puzzle and select the house whose name is NOT hidden in the PUZZLE.

A
B
C
D