National Science Olympiad Forum By SOF Olympiad Trainer - Page 128
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Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Subject :NSO    Class : Class 8

Following statements are given by four students :
Rashmi : Sodium chloride is an acidic salt whereas washing soda is a basic salt.
Akshi : The aqueous solution of sugar does not change the colour of either red litmus solution or blue litmus solution.
Reema : Tamarind tastes sour whereas baking soda is bitter in taste.
Shristi : Apple juice does not change the colour of red litmus solution.
The incorrect statement(s) is/are given by

AReema and Shristi only
BRashmi only
CAkshi and Reema only
DAkshi and Shristi only.


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SAMARPAN DAS from Notre Dame Academy, Salakati Kokrajhar
Subject :NSO    Class : Class 3

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Joahanna Gabriel from Christwood school, Chennai
Subject :NSO    Class : Class 8

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Siddharth Lakshmi Narayan from Greenwood High, Bangalore
Subject :NSO    Class : Class 5

Ans 1:

Avika Goel from Delhi Public School, Navi Mumbai
Class : Class 6
No. 'Mat' becomes 'mirror' and we spread the mat over the floor so the answer is mirror.

Ans 2:

Nayanika Sadhish from CL Metha Sishya OMR, Chennai
Class : Class 7
we can put cover on anything but we definitely don't put on floor

Ans 3:

Bidyaghnya Banerjee from Vidyasagar Shishu Niketan, West Bengal
Class : Class 6
Actually, we spread cover on the floor and cover becomes mirror. . .

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Siddiqua Modi from gems modern academy, udaipur
Subject :NSO    Class : Class 7

Read the given statements and select the correct option.
Statement 1 : Circular motion is the motion along a curve traced out by a moving object such that its distance from a fixed point is constant.
Statement 2 : The motion of a wheel of a moving bicycle is same as the motion of a mark on the blades of a moving electric fan.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DStatement 1 is false but statement 2 is true.


Ans 1:

Avn lakshmi from Bvbarra, Hyderabad
Class : Class 4

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Trina from Ganges Valley School, Hyderabad
Subject :NSO    Class : Class 6

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Anamkhan Mulla from Navrachna Sama, Vadodara
Subject :NSO    Class : Class 6

Shobha took two liquids (coconut oil and water) in a separating funnel as shown in the figure. What would she observe after some time?


A Layer ‘X’ is coconut oil, ‘Y’ is water and two distinct layers are formed.
B Layer ‘X’ is water, ‘Y’ is coconut oil and two distinct layers are formed.
C Layers ‘X’ and ‘Y’ are miscible to some extent, hence do not form distinct layers.
D Coconut oil is first collected in the beaker.


Easyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

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Shree Waishnawi from KV2, Visakhapatnam
Subject :NSO    Class : Class 2

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Aadvik saini from Mvn sector 17, Faridabad
Subject :NSO    Class : Class 7

Ans 1:

ADITRI JAISWAL from Zebar School for Children, Ahmedabad
Class : Class 9

Ans 2:

anshul shukla from modern, kota
Class : Class 7
Air always moves from High pressure to low pressure which causes wind

Ans 3:

Shreya bharati from St.joseph academy, Bihar Sharif
Class : Class 7
Answer B

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Aham from vibgyor high, Bangalore
Subject :NSO    Class : Class 8

Which of the containers shown below will continue to have healthy fish and plants at the end of a week?

A
B
C
D None of these


Well actually, the *container* is too small for 3 fish. Those look like saltwater fishes, how do i know that water is mixed with salt. Saltwater fishes usually require tanks that are 10 gallon upwards for each fish, that one looks like 5 gallons. And to add, the fake plant, could hurt the fish if they graze against it, its not real because there is no substrate.

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