National Science Olympiad Forum By SOF Olympiad Trainer - Page 165
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Abhigy verma from svm residential public school, patna
Subject :NSO    Class : Class 5

Ans 1:

Dhruv sharma from Manav Rachna International School, Faridabad
Class : Class 6
P shows head Q show cerebrum R shows cerebellum and S shows medulla oblongata . Hence b is the correct Answer

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Sudeep from Coyote Creek, San Ramon
Subject :NSO    Class : Class 1

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Sudeep from Coyote Creek, San Ramon
Subject :NSO    Class : Class 1

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Sudeep from Coyote Creek, San Ramon
Subject :NSO    Class : Class 1

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Neelam from Nachiketa, Bhavnagar
Subject :NSO    Class : Class 9

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ABCDE from admin, Noida
Subject :NSO    Class : Class 2

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Ananya Ojha from Delhi Public School, Noida
Subject :NSO    Class : Class 2

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Mohammad Ateeb Qaiser from DAV PUBLIC SCHOOL, WALMI COMPLEX, PHULWARI SHARIF , PATNA, patna
Subject :NSO    Class : Class 1

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

Observe the given reaction carefully and fill in the blanks by choosing an appropriate option.

Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
Before reaction, iron is (i) in colour and solution is (ii) in colour. After reaction iron gets (iii) deposits and the solution becomes (iv) in colour.

(i) (ii) (iii) (iv)
A Grey Colourless Red Blue
B Red Blue Grey Green
C Grey Blue Brown Green
D Red Colourless Grey Green


C is the answer

Ans 1:

Sushil Kumar from dpsnoida, Noida
Class : Class 7
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Ans 2:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
C is the answer

Ans 3:

Sushil Kumar from dpsnoida, Noida
Class : Class 7
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AaradhyaPatel from Delhi Public School, Korba
Subject :NSO    Class : Class 3

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