National Science Olympiad Forum By SOF Olympiad Trainer - Page 749
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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

Ans 2:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
The frequency is 900 hertz and can be heard by a human ear.

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Meghraj Padwal from ST THOMAS ENGLISH SCHOOL, KALYAN
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 2:

Sharvari Joshi from VIBGYOR High Balewadi, Pune
Class : Class 9
how is it ccan u pls explain

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Arunangshu Karmakar from Salt Lake School (English Medium), Kolkata
Subject :NSO    Class : Class 6

Ans 1:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it should be c as sun is just over head

Ans 2:

ramesh datta from DPS dwarka , New Delhi
Class : Class 7
answer should be b because at noon there is at least some shadow

Ans 3:

karthik from , tirupur
Class : Class 8
How?

Ans 4:

karthik from , tirupur
Class : Class 8
C is the correct answer

Ans 5:

ramesh datta from DPS dwarka , New Delhi
Class : Class 7
the answer could be c also as the shadow's length is increasing as time passes. but, it shows that at noon, there is no shadow. in b option there is at least some at noon, so it will be option b

Ans 6:

DIBYAJYOTI ROUTRAY from Stewart school, Cuttack
Class : Class 6
c should be the correct answer

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Arunangshu Karmakar from Salt Lake School (English Medium), Kolkata
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1: Groundwater is safe for drinking.
Statement 2: Groundwater is free from soluble impurities.

ABoth statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
CStatement 1 is correct but statement 2 is incorrect.
DBoth statements 1 and 2 are incorrect.


SOF tells that the answer is A. But Statement 2 is incorrect as we get Iron, Magnesium and Calcium Sulphates and Oxides dissolved in ground water. I think C should be correct.

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arush tiwari from dps varanasi, Varanasi
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement-1 : The brightness of the bulb A remains the same after the switch is closed.
Statement-2 : The voltage across elements in parallel is the same.


A Both statements-1 and 2 are true and statement-2 is the correct explanation of statement-1.
B Both statements-1 and 2 are true but statement-2 is not the correct explanation of statement-1.
C Statement-1 is true and statement-2 is false.
D Both statements-1 and 2 are false.


I think answer is A

Ans 1:

Vamsi Krishnan R from CMR NPS, Bangalore
Class : Class 6

Ans 2:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 3:

Anvi from DPS, Noida
Class : Class 8
voltage is not a part of our syllabus

Ans 4:

Pratheek from Null, Null
Class : Class 4
Please make the solution clear. It s quite difficult to understand such complicated language

Ans 5:

Irresh Vijay from NPSI Singapore, Singapore
Class : Class 8
connection to Bulb A is incorrect.

Ans 6:

Anurag Basistha from Prudence School Dwarka 16 B, Delhi
Class : Class 8
Please check the correctness.

Ans 7:

chittaranjan kar from MLZS, Jaipur
Class : Class 3
The given solution seems to be wrong. The answer may be A.

Ans 8:

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

Ans 9:

Shweta Garg from Vibgyor high, Vadodara
Class : Class 8

Ans 10:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8
it should be a ,;[p..;[;[[

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Dhruv from na, Udaipur
Subject :NSO    Class : Class 6

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A Andrew from Lalaji Memorial Omega International School, Chennai
Subject :NSO    Class : Class 4

Ans 1:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Class : Class 4
Ans should be A not c, since the container can measure only one quantity like 5 ltrs , but option A can measure different amount of water.

Ans 2:

Arkoprava Dey from Techno India Group Public School, Coochbehar, Coochbehar
Class : Class 9
answer is A

Ans 3:

AARUSH from DPS, Mumbai
Class : Class 4
C

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A Andrew from Lalaji Memorial Omega International School, Chennai
Subject :NSO    Class : Class 4

Which of the following is correct regarding the impact of deforestation?
(i) Plants of medicinal values found in the forest are lost.
(ii) Fewer trees are left around to hold the soil together, resulting in soil erosion.
(iii) Global warming occurs as there are fewer trees to absorb carbon dioxide.
(iv) The risk of an epidemic outbreak increases, resulting in the death of animals living in forests.

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


i have a doubt

Ans 1:

INDRANI GHOSH ROY from AMRITA VIDYALAYAM, Durgapur
Class : Class 5
No.C(i,ii,iii) are correct regarding deforestation.

Ans 2:

Kaushik J from san academy , Chennai
Class : Class 5

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A Andrew from Lalaji Memorial Omega International School, Chennai
Subject :NSO    Class : Class 4

Ans 1:

AARUSH from DPS, Mumbai
Class : Class 4
B

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