National Science Olympiad Forum By SOF Olympiad Trainer - Page 507

User Forum

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

Class : Class 9

Ans 5:

Class : Class 10

Ans 6:

Class : Class 6
The answer is d

Ans 7:

Class : Class 9
The answer is c

Ans 8:

Class : Class 7
I was a bit confused between C and D

Ans 9:

Class : Class 7

Ans 10:

Class : Class 4
d

Ans 11:

Class : Class 4
ans is D so easy

Ans 12:

Class : Class 4
Low High Many Many

Ans 13:

Class : Class 5
c

Ans 14:

Class : Class 7
Sorry , my brother changed the C into D . It should be C only !

Ans 15:

Class : Class 3
D

Ans 16:

Class : Class 10
Sorry all, I had not read the question well.😞😞

Ans 17:

Class : Class 6
Veer Sehrawat, how c, the question says which town is located near an unpolluted river not a polluted river.

Ans 18:

Class : Class 5
no chart no answer

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
NA

Ans 2:

Class : Class 7

Ans 3:

Class : Class 9

Post Your Answer

Subject :NSO    Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
What is mimicry?

Ans 2:

Class : Class 5
😓😓copying

Ans 3:

Class : Class 7
Mocking or copying.

Ans 4:

Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10

Ans 2:

Class : Class 6

Ans 3:

Class : Class 8

Ans 4:

Class : Class 7
The answer D is correct. Magnetic field moves from North to South, and if you follow the direction of the compasses, you will see that this theory is true.

Ans 5:

Class : Class 9

Ans 6:

Class : Class 10
The correct and is D as the magnetic field moves from North to south

Ans 7:

Class : Class 9

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
I agree with Aritroray the answer should be C

Ans 2:

Class : Class 10

Ans 3:

Class : Class 3
No guys. Human eye can't focus simultaneously on two points. To avoid parallax error , eye should be on the point of measurement to be taken.Hence given answer is correct in my view. You may comment.

Ans 4:

Class : Class 10
GIVEN ANSWER IS NOT CORRECT AS A IS THE CORRECT ANSWER

Ans 5:

Class : Class 6
it is simple that while measuring, at first you eye must be vertically above 0

Ans 6:

Class : Class 6
this is basic 6th grade physics, you cannot always be measuring 0cm, so as to avoid parallax error your eye must be placed right above the scale, if you do not beleive me ask your science/physics teacher. Hence it is A.

Ans 7:

Class : Class 6

Ans 8:

Class : Class 6
cccccccccccc

Ans 9:

Class : Class 6
the answer will be both a and b

Ans 10:

Class : Class 7
i think its C

Ans 11:

Class : Class 8
I think it should be C because otherwise the zero end can shift slightly (in our viewpoint) and measurement will be wrong. So both statements a and b are correct and the answer is C.

Ans 12:

Class : Class 7
no because what will u do of zero u have to

Ans 13:

Class : Class 8

Ans 14:

Class : Class 7
No as it causes a parallax error. It should be option A. If you don't believe me then try it yourself with a scale and measuring a line segment from different eye positions. You will see that, the measurement varies slightly every time. That's why option A is correct.

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

Ans 2:

Class : Class 1
A

Ans 3:

Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 4:

Class : Class 6
A

Ans 5:

Class : Class 6

Ans 6:

Class : Class 3
A

Ans 7:

Class : Class 7

Ans 8:

Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 9:

Class : Class 9

Ans 10:

Class : Class 10
A

Ans 11:

Class : Class 1

Ans 12:

Class : Class 8
a

Ans 13:

Class : Class 9

Ans 14:

Class : Class 7
A as image is as far behind the mirror as Object is in front of it. In this case Sachin is 3 m in front of the mirror and the object seems to be seven meters ahead. As Sachin is 3 m in front of the mirror that means object is (7-3) = 4 m behind the mirror. As image is as far behind the mirror as Object is in front of it, It means chart is 4 meters in front of the mirror. ( 4 - 3 ) = 1 m behind Sachin as Sachin is also in front of the mirror. Hope that answers your question !

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 10

Ans 3:

Class : Class 5
yes ,you are rightans is c

Ans 4:

Class : Class 5
Ans is C potato is stem and sugar cane also stem

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
How is it C

Ans 2:

Class : Class 7
B is not correct as it is gravity that causes objects to fall on the ground

Ans 3:

Class : Class 7
frictional force is answer prevents from slipping

Ans 4:

Class : Class 4
how about B

Ans 5:

Class : Class 9

Ans 6:

Class : Class 8

Ans 7:

Class : Class 5
Yes how it can be C ?

Ans 8:

Class : Class 7
B is not correct as it is gravity that causes objects to fall on the ground

Post Your Answer