National Science Olympiad Forum By SOF Olympiad Trainer - Page 258
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Darshil Rath from Sai International School , Bhubaneswar
Subject :NSO    Class : Class 3

Ans 1:

T S from OWIS, Bangalore
Class : Class 3

Ans 2:

Dyuti Ghosh from Mount Litera Zee School , JAJPUR ROAD
Class : Class 3

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A


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Srihari g from silveroaks, hyderabad
Subject :NSO    Class : Class 10

Shaheen, a class 10 student studied the speed of the given reaction under different conditions.

In experiment I, she added 1 g of MnO2 (catalyst) to 75 cm3 of 0.4 mol/L H2O2 solution at 30°C In experiment II, she added 1 g of MnO2 to 100 cm3 of 'X' mol/L H2O2 solution at 'T' °(C) She recorded her observations and plotted a graph as shown in the given figure.
The values of X and T in experiment II could be respectively


A 0.30 and 35
B 0.40 and 30
C 0.25 and 30
D 0.30 and 30.


How to find this?

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PRABHMEHAR KAUR from prabhmehar kaur, chabua
Subject :NSO    Class : Class 7

Rihan takes an empty half litre plastic bisleri bottle. He opens the lid and fixes his mouth on the opening in such a way that there is no gap between the opening and his mouth. He observes that the bottle crushes inwards when he sucks some air out of the bottle. Which of the following statements is the reason for Rihan’s observation?

AAir pressure inside the bottle increases.
BAir pressure outside the bottle increases.
CAir pressure inside the bottle decreases.
DAir pressure outside the bottle decreases.


Ans 1:

Akshat from narayana e techno, BANGALORE
Class : Class 7
Air pressure outside the bottle increases as while drinking the water, the air pressure inside the bottle is reduced as he drinks the water with a force acting towards his mouth. Due to this the amount of air inside reduces and there will be no force exerted on the inner walls of the bottle from the inside.

Ans 2:

Akshat from narayana e techno, BANGALORE
Class : Class 7
Air pressure outside the bottle increases as while drinking the water, the air pressure inside the bottle is reduced as he drinks the water with a force acting towards his mouth. Due to this the amount of air inside reduces and there will be no force exerted on the inner walls of the bottle from the inside.

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Aarav chandak from Witty internatioal school, Bhiwara
Subject :NSO    Class : Class 5

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Aditri Dixit from TCIS, Bangalore
Subject :NSO    Class : Class 3

Select the best suitable means of communication to get informed or to inform others for the given situations (X, Y and Z).
X : Your sister’s marriage has been fixed and you want all your relatives and friends to be present at the wedding.
Y : Your grandfather, suddenly, suffered from a heart attack and your father is in his office.
Z : Incidence of tsunami had occurred in Japan.

X Y Z
A Radio E-mail Postcard
B Letter Telephonic call Newspaper
C E-mail Television Fax
D Fax Newspaper E-mail


Ans 1:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 2:

Avik Arya from Trileaves Global school , Chennai
Class : Class 3

Ans 3:

Avik Arya from Trileaves Global school , Chennai
Class : Class 3
The answer is B

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Dushyant Singh from Shri Ram Centennial School, Indore
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C


Ans 2:

Kiara Saxena from Shishukunj International, Indore
Class : Class 5

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Aarav Srivastav from DWPS , Noida Extension
Subject :NSO    Class : Class 6

Ans 1:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7

Ans 2:

Ayush Yadav from Salwan Public School, Gurgaon
Class : Class 6
A

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Aniket Ghosh from DAV Public School Haldia, Haldia
Subject :NSO    Class : Class 7

Ans 1:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Answer is D .Because the time is going on but no displacement.so we can also say that the body is in rest

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Amrik Pal from Kendriya Vidyalaya DRDO, Bangalore
Subject :NSO    Class : Class 6

Ans 1:

Amrik Pal from Kendriya Vidyalaya DRDO, Bangalore
Class : Class 6
b

Ans 2:

Arsh Gupta from Cambridge International School, Jalandhar
Class : Class 4
b

Ans 3:

Siddhartha from Gyanfort school, Farrukhabad
Class : Class 6
I think C can be the answer

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Aditri Dixit from TCIS, Bangalore
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A


Ans 2:

ADVAY BANSAL from LOTUS VALLEY INTERNATIONAL SCHOOL GURUGRAM, GURUGRAM
Class : Class 6
ITS A ITS BIRD WINGS ITS LOKING LIKE OUR HANDS

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