National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
The answer should be C because during the last 10 seconds [ 40 second ] the distance is 10 meter not 5 meter.

Ans 2:

Class : Class 7
A

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 7
They are right it should be [B] .

Ans 2:

Class : Class 5
Tailor bird that is A

Ans 3:

Class : Class 7

Ans 4:

Class : Class 4
WHAT!!!!!! IT SHOULD BE (A).

Ans 5:

Class : Class 3
It should be a tailorbird

Ans 6:

Class : Class 4
what????

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 10
TBH2VI http://www.LnAJ7K8QSpfMO2wQ8gO.com

Post Your Answer

Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Class : Class 1
Alpha, Beta, Gamma in ascending order.

Alpha particles leaves the nucleus of an unstable atom at a speed of 16,000 kilometres per second, around a tenth the speed of light.
Beta particles travel at a speed of 270,000 kilometres per second, around 98% of speed of light.
Gamma particles travel at the speed of light.

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
question, answer and solution is wrongall the options are showing the difference on heating

Ans 2:

Class : Class 4
Please change it. It is correct in NSO book like Harish Divakar said

Ans 3:

Class : Class 7
you are right vaibhav all are wrong

Ans 4:

Class : Class 6
All the options are totally wrong, please change them

Ans 5:

Class : Class 5
wrong options

Ans 6:

Class : Class 5
SHOULD HAVE BEEN SPECIFIC WITH RESPECT TO X AND Y MARKING

Ans 7:

Class : Class 6
if an object is cooled down the molecule structure changes from loosely packed to tightly packed. therefore none of the options is correct

Ans 8:

Class : Class 6
PLS. CORRECT

Ans 9:

Class : Class 4
all options are wrong

Ans 10:

Class : Class 6
ALL ARE WRONG

Ans 11:

Class : Class 4
Are B, C, D correct.

Ans 12:

Class : Class 6
I think all options are wrong

Ans 13:

Class : Class 2
SOF IS MAD

Ans 14:

Class : Class 5
Can somebody pls answer this question with explanation

Ans 15:

Class : Class 5
wrong wrong wrong wrong wrong wrong

Ans 16:

Class : Class 4
all options are wrong

Ans 17:

Class : Class 4
When a substance is cooled the molecules come closer. But there is no picture showing that the molecules are coming closer there is no correct answer. Also option B and C are the same. Can you please change it?

Ans 18:

Class : Class 6
Please please please please please please please please change the question

Ans 19:

Class : Class 5
The question is wrong... and so the answer is also misleading.

Ans 20:

Class : Class 4
is there a correction in the options given?if not please clarify with explanation

Ans 21:

Class : Class 6

Ans 22:

Class : Class 5

Ans 23:

Class : Class 6
The options given are wrong / confusing. Please clarify.

Ans 24:

Class : Class 4
all Q are wrong

Ans 25:

Class : Class 3
I agree with Harry , 1 B AND C ARE NOT THE SAME. 2 When liquid is cooled down it forms solid, SO THE ONLY ANSWER IS CCCC

Ans 26:

Class : Class 6
I also think that.Questions ,options, colums and answers didn't mentioned.

Ans 27:

Class : Class 5
THE ANSWER IS WRONG.

Ans 28:

Class : Class 7
please change the question.

Ans 29:

Class : Class 5
ALL OPTIONS ARE WRONG

Ans 30:

Class : Class 4
how can liquid turn into gas by freezing ? Option A does the same thing so the correct option should be D

Ans 31:

Class : Class 5
Options are wrong. Molecular distance should be less. first fix which column is X and Y.

Ans 32:

Class : Class 4
Option b, c are the same. Pls give me a proper explanation as to why one option is correct

Ans 33:

Class : Class 5
it is wrong

Ans 34:

Class : Class 5
I have by mistake typed it Co sorry it will be C. I have a solution we can report error.

Ans 35:

Class : Class 5
b and c are all the same

Ans 36:

Class : Class 6

Ans 37:

Class : Class 6

Ans 38:

Class : Class 7
The correct answer is C

Ans 39:

Class : Class 7
The question , answer and the solution are all correct … Vrishank don't say that the SOF is mad ( I think you are mad ) you are a FOOL

Ans 40:

Class : Class 7
I think al options are wrong . Please tell the correct answer

Ans 41:

Class : Class 4
all are wrong

Ans 42:

Class : Class 6
option d maybe

Ans 43:

Class : Class 4
Please explain the answer. I also support Baibhab that the choices given are wrong.

Ans 44:

Class : Class 4
All are wrong. At least number of atoms should be same. So answer should be D

Ans 45:

Class : Class 6
Options are wrong. Molecular distance should be less.

Ans 46:

Class : Class 4
Qtn. agreed but main point is which is column X and which is column is Y??????

Ans 47:

Class : Class 5
B and Co are same. Intermolecular space is not decreasing in any of the situations. It is wrong.

Ans 48:

Class : Class 4
All options are wrong.

Ans 49:

Class : Class 5
all options are wrong

Ans 50:

Class : Class 5
the options are wrong

Ans 51:

Class : Class 4
ansAll answers oposite

Ans 52:

Class : Class 4
All options are WRONG

Ans 53:

Class : Class 6
There is no specific details about which one is X or Y.So by common sense I think that it would be D.But B

Ans 54:

Class : Class 6
4wrong question

Ans 55:

Class : Class 5
HARRY CAN YOU PLEASE EXPLAIN ME

Ans 56:

Class : Class 6
None of the options are correct according to my doubt.

Ans 57:

Class : Class 6
All the answer is wrong. In the NSO book, it is right.

Ans 58:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 4

Achin conducted an experiment to find out the amount of light that can pass through three different materials, a clear plastic sheet, a cardboard and a piece of tracing paper. All the materials have the same thickness. He shone a torch on the three materials and used a light sensor to measure how much light has passed through each of them. Which of the following graphs most likely shows the amount of light that has passed through each material?

A
B
C
D


Ans 1:

Class : Class 4
YES , C IS CORRECT @RAJVEER

Ans 2:

Class : Class 7
I think the ‘A’ is the right answer

Ans 3:

Class : Class 1
A is correct

Ans 4:

Class : Class 5

Ans 5:

Class : Class 4
AAAAAAAAA IS RIGHT

Ans 6:

Class : Class 5
a

Ans 7:

Class : Class 4
C is right and correct ,and if isnt tell me hhhhhhhhhhhhhhhooooooooooooooooooooowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwHOW?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????/

Ans 8:

Class : Class 5
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC is correct

Ans 9:

Class : Class 4
C IS THE CORRECT ANS AS BOTH CLEAR PLASTIC SHEET AND TRACING PAPER ARE BOTH TRANSLUCENT AND HENCE ALLOWING EQUAL AMOUNT OF LIGHT TO PASS THROUGH.

Ans 10:

Class : Class 7
The answer is C .

Ans 11:

Class : Class 4
Very Very Good

Ans 12:

Class : Class 7

Ans 13:

Class : Class 5
c

Post Your Answer

Subject :NSO    Class : Class 2

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 1
answer will be d 4 kilo meters

Ans 2:

Class : Class 7
4 km

Ans 3:

Class : Class 5

Ans 4:

Class : Class 7
4km

Post Your Answer

Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
SI unit of impluse is Newton

Ans 2:

Class : Class 10
force=change in momentum/time interval(del t) impulse=change in momentum=force * time interval(del t) SI unit of impulse is newton second or Ns. CGS unit of impulse is dyne second .

Post Your Answer

Subject :NSO    Class : Class 9

Post Your Answer