National Science Olympiad Forum By SOF Olympiad Trainer - Page 576

User Forum

Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

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 3:

Class : Class 5
coffee powder

Ans 4:

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

Ans 5:

Class : Class 8

Ans 6:

Class : Class 7
Coffee powder

Ans 7:

Class : Class 3
Ans-d

Ans 8:

Class : Class 5
my actual answer is salt

Ans 9:

Class : Class 5

Ans 10:

Class : Class 7
It's chalk powder

Ans 11:

Class : Class 6
It's C coffee powder.

Ans 12:

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

Ans 13:

Class : Class 5
coffee powder

Ans 14:

Class : Class 5
The correct answer is d

Ans 15:

Class : Class 5
salt

Ans 16:

Class : Class 7
It's chalk powder

Ans 17:

Class : Class 8

Ans 18:

Class : Class 8
salt for the way

Ans 19:

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 20:

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

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 9
The answer is D) 4

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

Class : Class 4
5

Ans 8:

Class : Class 5

Ans 9:

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

Ans 10:

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 11:

Class : Class 3
ayurda 4 d 4

Ans 12:

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

Ans 13:

Class : Class 5
its d

Ans 14:

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

Ans 15:

Class : Class 5
5

Ans 16:

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

Ans 17:

Class : Class 4
4 IS THE CORRECT ANSWER

Ans 18:

Class : Class 7
SEMICIRCLE5B

Ans 19:

Class : Class 4
55555555555555555555555555555555555555555 is the ans

Ans 20:

Class : Class 5
why semicircle not be counted

Ans 21:

Class : Class 6

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7
Answer is d

Ans 2:

Class : Class 8
D

Ans 3:

Class : Class 9

Ans 4:

Class : Class 8
Answer is D

Ans 5:

Class : Class 9
The answer is A.

Ans 6:

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

Ans 7:

Class : Class 8
The answer should be D

Ans 8:

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

Ans 9:

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 10:

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 11:

Class : Class 8
Yes answer is D

Ans 12:

Class : Class 8

Ans 13:

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

Ans 14:

Class : Class 8

Ans 15:

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 16:

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 17:

Class : Class 10

Ans 18:

Class : Class 9
I ALSO THINK THE ANSWER IS D

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
C because 25341 spells stick

Ans 2:

Class : Class 5
25341

Ans 3:

Class : Class 7
C

Ans 4:

Class : Class 5
25341

Ans 5:

Class : Class 4
c

Ans 6:

Class : Class 4
it is wrong

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

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 2:

Class : Class 4

Ans 3:

Class : Class 5
d

Ans 4:

Class : Class 5

Ans 5:

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

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5
d

Ans 8:

Class : Class 9
D

Ans 9:

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

Ans 10:

Class : Class 4

Ans 11:

Class : Class 8
d is the right answer

Ans 12:

Class : Class 4
CAN SOMEONE EXPAIN?

Ans 13:

Class : Class 4
B is the answer

Ans 14: (Master Answer)

Class : Class 1

Ans 15:

Class : Class 4
ans was b and i wrote b

Ans 16:

Class : Class 4
Explain PleaseI need the explaination

Ans 17:

Class : Class 8

Ans 18:

Class : Class 4

Ans 19:

Class : Class 5
DDD

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 8

Ans 2:

Class : Class 4

Ans 3:

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

Ans 4:

Class : Class 5
Seen you all later.

Ans 5:

Class : Class 7
d

Ans 6:

Class : Class 7

Ans 7:

Class : Class 4

Ans 8:

Class : Class 6

Ans 9:

Class : Class 8
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 10:

Class : Class 4
The answer should be option C

Ans 11:

Class : Class 7

Ans 12:

Class : Class 1
A

Ans 13:

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

Ans 14:

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

Ans 15:

Class : Class 4
I think it is c.

Ans 16:

Class : Class 3

Ans 17:

Class : Class 4
Answer has to be option B

Ans 18:

Class : Class 5
option b

Ans 19:

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

Ans 20:

Class : Class 7
B

Ans 21:

Class : Class 8
How a Vineet?

Ans 22:

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.

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
I have one thing to say the answer is C

Ans 3:

Class : Class 8

Ans 4:

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

Ans 5:

Class : Class 4
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 6:

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 7:

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 8:

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

Ans 9:

Class : Class 3
ANS MUST BE Opt C

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

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 1
NA

Post Your Answer