National Science Olympiad Forum By SOF Olympiad Trainer - Page 430
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shreyash rawat from podar international school, pune
Subject :NSO    Class : Class 4

Ans 1:

Apoorva Gaurav from DAV, Muzaffarpur
Class : Class 5
Answer is hatching.

Ans 2:

shreyash rawat from podar international school, pune
Class : Class 8

Ans 3:

Aakanksha devendra ghorpade from Bhavans gvm , Hinganghat
Class : Class 4
Incubation C Is the answer

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aditya apurva from DAV public School, Duttnagar
Subject :NSO    Class : Class 9

Ans 1:

Aarju Pal from Arambagh Vivekananda Academy, Arambagh
Class : Class 9
yes, (a) is the right answer as due to accelaration by gravity, velocity of any freely falling object will increase continuously. So, (b) is wrong as h1, h2 and h3 are given equal, (c)is wrong too as it is given that covered distance decreases after every 5 seconds, and (d) is also wrong for the same reason.

Ans 2:

ADITYA KISHOR from dps, gaya
Class : Class 9

Ans 3:

Ankur Kumar from Delhi Public School, Ranchi
Class : Class 9
Option D is the correct answer as the ratio between H1 H2 and H3 is 1: 3 : 5.

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from , Nanded
Subject :NSO    Class : Class 9

Ans 1:

Sreyashi Ganguli from Bishop Cotton Girls School, Bengaluru
Class : Class 9
ans should no doubt be c because of the Hund 's rule and also fifth shell does accommodate 50 electrons according to 2n^2 :2*5^2=2*25=50.

Ans 2:

Ankur Kumar from Delhi Public School, Ranchi
Class : Class 9
Option B is wrong . As it is talking of the energy shell. OR might be the question is incorrect as the all the options are correct as per my information.

Ans 3:

RUDRANSH from Little Angels High School, Gwalior
Class : Class 8

Ans 4:

smriti khuntia from apeejay school,nerul, navi mumbai
Class : Class 9
C should be the answer! a- 2*4^2=32. b-the outermost shell always has 8 to gain perfect stability or become a noble gas. c-wrong, filling always starts from the first, second, third, THEN fourth. d-2*5^2=50

Ans 5:

Sunita Kundu from Scholars rosary senior secondary school , Rohtak
Class : Class 10
Answer should be either B or c because both of them are incorrect

Ans 6:

Aarju Pal from Arambagh Vivekananda Academy, Arambagh
Class : Class 9
(a) is no doubt right, (b) may be wrong, (c) is right and (d) is also right.

Ans 7:

from d.g.v. sr. sec. school, rohtak
Class : Class 9
(D) is correct

Ans 8:

Sunita Kundu from Scholars rosary senior secondary school , Rohtak
Class : Class 10

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

Ans 1:

Ankur Kumar from Delhi Public School, Ranchi
Class : Class 9
Volume of the solid cube =(25*25*25)/1000000 cubic metre. Mass of the solid cube = the mass of the body which can be placed on it to completely submerge it Density = 0.1kg/ 125*(10)^6=800kg/m^3

Ans 2:

Ankur Kumar from Delhi Public School, Ranchi
Class : Class 9
Volume of the solid cube =(25*25*25)/1000000 cubic metre. Mass of the solid cube = the mass of the body which can be placed on it to completely submerge it Density = 0.1kg/ 125*(10)^6=800kg/m^3

Ans 3:

Arnav Bhatnagar from RFS, Navi Mumbai
Class : Class 8

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Subject :NSO    Class : Class 4

Ans 1:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
Thus ans is c not BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 2:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
Thus ans is c not BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 3:

Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Class : Class 4
b ans

Ans 4:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6

Ans 5:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
THIS IS NOT POSSIBLE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Because you can GOOGLE IT.......................................... MY OPINION- Kushagra Chaturvedi

Ans 6:

Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Class : Class 4

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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Chaitanya Gawade from JPS, Pune
Subject :NSO    Class : Class 9

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