National Science Olympiad Forum By SOF Olympiad Trainer - Page 572

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
It's C coffee powder.

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
Coffee Coffee Coffee Coffee Calls out Calls out the answer is C in the answer it is me it is me it is me

Ans 4:

Class : Class 4
The answer is D because D cant desolve in water while others can.So the answer is D.

Ans 5:

Class : Class 7
It's chalk powder

Ans 6:

Class : Class 6
The correct answer is d chalk powder because it is insoluble in water while the rest are not.

Ans 7:

Class : Class 7
It's chalk powder

Ans 8:

Class : Class 7
Coffee powder

Ans 9:

Class : Class 5
The correct answer is d

Ans 10:

Class : Class 9
chalk powder is insoluble in water while others are soluble, chalk powder can be separated from water by sedimentation and decantation or filtration but others need evaporation...… Now I think Harsh you understood why the answer is D!!

Ans 11:

Class : Class 5
my actual answer is salt

Ans 12:

Class : Class 5
coffee powder

Ans 13:

Class : Class 5
coffee powder

Ans 14:

Class : Class 5
why is chalk powder the correct answer?

Ans 15:

Class : Class 8
salt for the way

Ans 16:

Class : Class 3
Ans-d

Ans 17:

Class : Class 5
salt

Ans 18:

Class : Class 9
The correct answer is C . It will be coffee power.

Ans 19:

Class : Class 8

Ans 20:

Class : Class 3

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 3
ayurda 4 d 4

Ans 2:

Class : Class 6

Ans 3:

Class : Class 8
b as there is a semi-circle

Ans 4:

Class : Class 7
There is no semicircle.Answer is 4.

Ans 5:

Class : Class 8
semicircle is there but made by square so the answer is 4

Ans 6:

Class : Class 5
5

Ans 7:

Class : Class 4
55555555555555555555555555555555555555555 is the ans

Ans 8:

Class : Class 7
5 is the answer because there is even semi circle there with rectangle,square and triangle.

Ans 9:

Class : Class 7
SEMICIRCLE5B

Ans 10:

Class : Class 7
Can you tell the answer of this question

Ans 11:

Class : Class 8
IT SHOULD BE 5 AS THERE IS SQUARE TRIANGLE SEMECIRCLE RECTANGLE AND DIAMOND

Ans 12:

Class : Class 5
its d

Ans 13:

Class : Class 7
the answer can even be 'B' as semi-circle is there ,made by square

Ans 14:

Class : Class 8
How are we supposed to know it’s a rectangle when hidden by the circle ,bonne nuit

Ans 15:

Class : Class 5

Ans 16:

Class : Class 6
all listen it should be 5 as i think because the rectangle is dividing the circle into two halves which is forminig a semi circle and if sof has to 4 which means that it should be a whole shape like circle triangle etc.so if it is wholes shape SOF is right or elseNiteen Jit Sahu and all others who say semi circle are right

Ans 17:

Class : Class 8
How 5? answer is 4The shapes are:circle,triangle,rectangle and square

Ans 18:

Class : Class 4
5

Ans 19:

Class : Class 9
The answer is D) 4

Ans 20:

Class : Class 4
4 IS THE CORRECT ANSWER

Ans 21:

Class : Class 5
why semicircle not be counted

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
the answer has to be d because friction always oppose the relative motion of an object no matter if it accelerates or not.

Ans 2:

Class : Class 9

Ans 3:

Class : Class 9
I'm confused about the same thing...friction opposes relative motion, so it will obviously be towards west??

Ans 4:

Class : Class 8
the answer is D but is given wrong in this question .

Ans 5:

Class : Class 8
The answer should be D

Ans 6:

Class : Class 9
I ALSO THINK THE ANSWER IS D

Ans 7:

Class : Class 8

Ans 8:

Class : Class 7
Answer is d

Ans 9:

Class : Class 9
The answer is A.

Ans 10:

Class : Class 10
see guys, i think u all are mistaken. We dont consider in what direction the car is going, but in which direction the wheel is turning. for the car to go forwards, the wheel must roll clockwise. so for the car to go east, wheel must roll in the clockwise direction. Now consider a very small part of the wheel which is touching the ground. to wheel to roll in clockwise direction , that small part must slide backward, and that must continously happen in order for wheel to turn clockwise and car to go in east direction. And u know, friction is b/w the surface in contact, i.e the rolling part of the wheel, not with the car. so friction should oppose the backward-going part of the wheel, and thus in the ame direction with the motion of the car. if friction were to be in west, the car would never go in east direction, because the wheel would'nt have any force to oppose, to make it go in that direction, and thus the car would never be able to go towards the east direction!

Ans 11:

Class : Class 10

Ans 12:

Class : Class 8
Yes answer is D

Ans 13:

Class : Class 8
Answer is D

Ans 14:

Class : Class 8

Ans 15:

Class : Class 8
D

Ans 16:

Class : Class 9
The correct answer is d as friction acts opposite to the direction of the applied force

Ans 17:

Class : Class 8
How can the direction of friction be towards east? It should always act in the direction opposite to that of the direction of the moving body, i.e., friction should act towards the west irrespective of whether the vehicle is accelerating or retarding. So the correct answer should be D!

Ans 18:

Class : Class 8
I think that option "D" is the correct answer as friction is always opposite to direction of motion of the object

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
25341

Ans 2:

Class : Class 4
it is wrong

Ans 3:

Class : Class 7
C

Ans 4:

Class : Class 7
C because 25341 spells stick

Ans 5:

Class : Class 4
c

Ans 6:

Class : Class 5
25341

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
CAN SOMEONE EXPAIN?

Ans 2:

Class : Class 5

Ans 3: (Master Answer)

Class : Class 1

Ans 4:

Class : Class 8
d is the right answer

Ans 5:

Class : Class 4

Ans 6:

Class : Class 4
Explain PleaseI need the explaination

Ans 7:

Class : Class 9
D

Ans 8:

Class : Class 5

Ans 9:

Class : Class 5
d

Ans 10:

Class : Class 5
what they've went and done is put exxxtra optionsss! Real irratating

Ans 11:

Class : Class 4
D is the right ansExplanation- LOW VITAMIN A - NIGHT BLINDNESSLOW V. B - BERI BERI

Ans 12:

Class : Class 6
YOU! An admin from Revisewise, you don't even own up to SOF's mistake.Da questions do not show properly and you think I'm responsible!

Ans 13:

Class : Class 5
DDD

Ans 14:

Class : Class 4
ans was b and i wrote b

Ans 15:

Class : Class 5
d

Ans 16:

Class : Class 8

Ans 17:

Class : Class 4

Ans 18:

Class : Class 4
B is the answer

Ans 19:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
ans b is the answer......

Ans 2:

Class : Class 4
The answer should be option C

Ans 3:

Class : Class 1
A

Ans 4:

Class : Class 8
How a Vineet?

Ans 5:

Class : Class 4

Ans 6:

Class : Class 7
B

Ans 7:

Class : Class 8

Ans 8:

Class : Class 6

Ans 9:

Class : Class 7

Ans 10:

Class : Class 7
d

Ans 11:

Class : Class 4
I think it is c.

Ans 12:

Class : Class 8
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 13:

Class : Class 4
Answer has to be option B

Ans 14:

Class : Class 4

Ans 15:

Class : Class 6
SOF Trainer Is Saying Option D But I Think It Is Option C

Ans 16:

Class : Class 3

Ans 17:

Class : Class 5
It's answer should be B option

Ans 18:

Class : Class 5
My head is not working and you all are crowding at a simple question! The answer of this question is always bbbbbbbbbbbbbbbbbbbbbb. Are you all are a small kindergarten kids? I think yes. You all are a kids . I think you all will in class 9 or 10. I am sure.

Ans 19:

Class : Class 5
Seen you all later.

Ans 20:

Class : Class 5
option b

Ans 21:

Class : Class 4
Olympiad trainer is saying wrong it would be B bcoz it is 18....

Ans 22:

Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
a is answer

Ans 2:

Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 1
THE ANSWER SHOULD BE C !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 2:

Class : Class 3
no, I changed my answer there is a misconception that camels drink less water.A camel's water intake varies according to his environment, his exertion level, and the amount of fat in his hump. A thirsty camel can drink more than 30 gallons of water in less than 15 minutes. 1.1 A typical camel can drink 200 liters (53 gallons) of water in three minutes. they drink a lot of water but can also go a long time without drinking water...hope it helps

Ans 3:

Class : Class 7
c c c c c c c c c c c c c c c c c c c cc c c c c c c c c c c c c it should be c

Ans 4:

Class : Class 3
ANS MUST BE Opt C

Ans 5:

Class : Class 7
would'nt the answer be c ?because kangaroo rats consume water in very limited wayand slow their metablic rate.

Ans 6:

Class : Class 8
I think the answer should be c .

Ans 7:

Class : Class 3
I have one thing to say the answer is C

Ans 8:

Class : Class 4
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 9:

Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 1
NA

Ans 2:

Class : Class 7
It should be option A

Ans 3:

Class : Class 1

Ans 4:

Class : Class 7
it is wrong because north east India receives less rainfall as rajasthan is in north east india

Ans 5:

Class : Class 7

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