National Science Olympiad Forum By SOF Olympiad Trainer - Page 136
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Aryan Choudhary from bhartividya bhavansh, vadodara
Subject :NSO    Class : Class 9

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KRISHNARGHYA PRAMANIK from DELHI PUBLIC SCHOOL, MEGACITY, KOLKATA WEST BENGAL
Subject :NSO    Class : Class 1

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pranavi from BVBPS, Hyderabad
Subject :NSO    Class : Class 7

Preeti has collected some items from her kitchen :
i. Amla
ii. Baking soda
iii. Tamarind
iv. Soap
v. Lime water
vi.Common salt
vii.Sugar
She classified them as acidic, basic and neutral substances.
Which of the following classification is correct?

          Acidic              Basic                Neutral
A(i), (ii)            (iv), (vii)            (iii), (v), (vi)
B(iv), (vi)         (i), (ii), (iii)          (v), (vii)
C(i), (iii)          (ii), (v), (vi)          (iv), (vii)
D(i), (iii)          (ii), (iv), (v)          (vi), (vii)


Ans 1:

Rangnath sharma from MOUT LITERA ZEE SCHOOL, PATNA
Class : Class 9

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

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Prisha bhuyan from Chirec international school, Hyderabad
Subject :NSO    Class : Class 2

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Pranav from JSS Public School, Bengaluru
Subject :NSO    Class : Class 9

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Pranav from JSS Public School, Bengaluru
Subject :NSO    Class : Class 9

The diagram shows the positions of the air particles due to propagation of sound, represented by straight lines, at a particular instant from P to Q.

Which of the following statements correctly depicts the pressure variation with respect to distance?

A The lines which are closed to one another represent rarefaction which is a low pressure region.
B The lines which are far apart from one another represent compression which is a low pressure region.
C The lines which are far apart from one another represent rarefaction which is high pressure region.
D The lines which are closed to one another represent compression which is a high pressure region.


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Pranav from JSS Public School, Bengaluru
Subject :NSO    Class : Class 9

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

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