National Science Olympiad Forum By SOF Olympiad Trainer - Page 578

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Option A

Ans 2:

Class : Class 8
Solution States that "correct" answer is wrong!

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Explanation in the solution is not matching any options. According to explanation option one and three are correct.

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Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 5

Ans 4:

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 5:

Class : Class 6
It's C coffee powder.

Ans 6:

Class : Class 5
salt

Ans 7:

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

Ans 8:

Class : Class 3
Ans-d

Ans 9:

Class : Class 7
It's chalk powder

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 7
It's chalk powder

Ans 12:

Class : Class 8
salt for the way

Ans 13:

Class : Class 8

Ans 14:

Class : Class 5
coffee powder

Ans 15:

Class : Class 5
my actual answer is salt

Ans 16:

Class : Class 5
coffee powder

Ans 17:

Class : Class 5
The correct answer is d

Ans 18:

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

Ans 19:

Class : Class 7
Coffee powder

Ans 20:

Class : Class 8

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Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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

Ans 7:

Class : Class 4
5

Ans 8:

Class : Class 5
its d

Ans 9:

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

Ans 10:

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

Ans 11:

Class : Class 4
55555555555555555555555555555555555555555 is the ans

Ans 12:

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

Ans 13:

Class : Class 9
The answer is D) 4

Ans 14:

Class : Class 3
ayurda 4 d 4

Ans 15:

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

Ans 16:

Class : Class 7
SEMICIRCLE5B

Ans 17:

Class : Class 6

Ans 18:

Class : Class 5
why semicircle not be counted

Ans 19:

Class : Class 4
4 IS THE CORRECT ANSWER

Ans 20:

Class : Class 5
5

Ans 21:

Class : Class 5

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

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 3:

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 4:

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 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

Class : Class 8
Answer is D

Ans 9:

Class : Class 8
The answer should be D

Ans 10:

Class : Class 9

Ans 11:

Class : Class 9
I ALSO THINK THE ANSWER IS D

Ans 12:

Class : Class 8

Ans 13:

Class : Class 8
Yes answer is D

Ans 14:

Class : Class 10

Ans 15:

Class : Class 8

Ans 16:

Class : Class 8
D

Ans 17:

Class : Class 9
The answer is A.

Ans 18:

Class : Class 7
Answer is d

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
25341

Ans 2:

Class : Class 7
C

Ans 3:

Class : Class 5
25341

Ans 4:

Class : Class 4
c

Ans 5:

Class : Class 4
it is wrong

Ans 6:

Class : Class 7
C because 25341 spells stick

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 5
DDD

Ans 3:

Class : Class 4

Ans 4:

Class : Class 4

Ans 5: (Master Answer)

Class : Class 1

Ans 6:

Class : Class 5

Ans 7:

Class : Class 9
D

Ans 8:

Class : Class 5
d

Ans 9:

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 10:

Class : Class 8

Ans 11:

Class : Class 4
Explain PleaseI need the explaination

Ans 12:

Class : Class 4
B is the answer

Ans 13:

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

Ans 14:

Class : Class 5
d

Ans 15:

Class : Class 8
d is the right answer

Ans 16:

Class : Class 5
D is the right ansExplanation- LOW VITAMIN A - NIGHT BLINDNESSLOW V. B - BERI BERI

Ans 17:

Class : Class 4
ans was b and i wrote b

Ans 18:

Class : Class 5

Ans 19:

Class : Class 4
CAN SOMEONE EXPAIN?

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Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

Class : Class 8
How a Vineet?

Ans 3:

Class : Class 8
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 4:

Class : Class 4
The answer should be option C

Ans 5:

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

Ans 6:

Class : Class 7
d

Ans 7:

Class : Class 8

Ans 8:

Class : Class 7
B

Ans 9:

Class : Class 3

Ans 10:

Class : Class 5
option b

Ans 11:

Class : Class 4
Answer has to be option B

Ans 12:

Class : Class 4

Ans 13:

Class : Class 6

Ans 14:

Class : Class 7

Ans 15:

Class : Class 5
Seen you all later.

Ans 16:

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 17:

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

Ans 18:

Class : Class 1
A

Ans 19:

Class : Class 7

Ans 20:

Class : Class 4

Ans 21:

Class : Class 4
I think it is c.

Ans 22:

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

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
a is answer

Ans 2:

Class : Class 8

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Subject :NSO    Class : Class 8

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