National Science Olympiad Forum By SOF Olympiad Trainer - Page 46
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Ashvik Banerjee from Mount Litera Zee School , Vasco
Subject :NSO    Class : Class 8

Ans 1:

Lakshya from NPS agara, Bengaluru
Class : Class 8
what is sirius?

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Iba Khan from DPS , Noida
Subject :NSO    Class : Class 8

Select the correct statements.
(i) Magnesium ribbon on heating in air catches fire and burns with white flame to form magnesium oxide.
(ii) All metals react with water to evolve hydrogen gas.
(iii) Iron reacts with cold water slowly.
(iv) Sodium metal is always kept in kerosene as it reacts vigorously with air and moisture.

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


why is option C not the right answer?

Ans 1:

Advay Das from Delhi Public School, Gurgaon
Class : Class 4
It should be c not b or the question should have written incorrectly

Ans 2:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
why have they missed the letters 'i' and 'n' in the question?or maybe they have marked the wrong answer as the correct onenot agreedSOF PLEASE TAKE NOTE AND CORRECT THE ERROR

Ans 3:

NIVED PRAKASH NAIR from SARVODAYA, THIRUVANANTHAPURAM
Class : Class 8

Ans 4:

ALICE from Delhi Public School, UDAIPUR
Class : Class 8

Ans 5:

NIVED PRAKASH NAIR from SARVODAYA, THIRUVANANTHAPURAM
Class : Class 8

Ans 6:

Keshav from Deens Academy, Bengaluru
Class : Class 8

Ans 7:

ALICE from Delhi Public School, UDAIPUR
Class : Class 8

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LITHRA GOPI from VIDHYALAKSHMI CBSE senior secondary School, Vellore
Subject :NSO    Class : Class 6

Ans 1:

LITHRA GOPI from VIDHYALAKSHMI CBSE senior secondary School, Vellore
Class : Class 6
My answer is option c

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AARNA GOEL from UPTON SCHOOL, ENGLAND
Subject :NSO    Class : Class 5

Ans 1:

Tanvi from hh, delhi
Class : Class 5
I know, it's B!

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from ,
Subject :NSO    Class : Class 6

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Nikita Rangarajan from PSBB, Chennai
Subject :NSO    Class : Class 7

Sumedha took a spoon of turmeric powder and made a paste by adding little water to it. She cut thin strips of a paper and applied this paste on them. After drying she put few drops of given sample solutions (i)-(iv) on these strips. What would be the changes in the colour she observed?


(i) Amla juice
(ii) Lime water
(iii) Common salt solution
(iv) Baking soda solution

(i) (ii) (iii) (iv)
A Yellow Red Yellow Red
B Red Yellow Yellow Red
C Red Red Yellow Yellow
D Yellow Yellow Red Red


Amla juice is acidicIt is A

Ans 1:

Nikita Rangarajan from PSBB, Chennai
Class : Class 7

Ans 2:

Nikita Rangarajan from PSBB, Chennai
Class : Class 7

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Kimaya from mlzs, Bangalore
Subject :NSO    Class : Class 6

Ans 1:

RS LEGEND from City Montessori School, Lucknow
Class : Class 1
3 is the correct answer

Ans 2:

Kimaya from mlzs, Bangalore
Class : Class 3

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AUSTIN from Viswajyothi CMI Public School, Chowara
Subject :NSO    Class : Class 1

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Nithya Soman from The Charter School, Eranakulam
Subject :NSO    Class : Class 4

Ans 1:

Spruha from AVM, mumbai
Class : Class 4

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Nithya Soman from The Charter School, Eranakulam
Subject :NSO    Class : Class 4

Ans 1:

Arnav Loganathan from Suguna PIPS , Coimbatore
Class : Class 4

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