National Science Olympiad Forum By SOF Olympiad Trainer - Page 581

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
i think all are correct, because I am the topper.........

Ans 2:

Class : Class 6
II, III AND IV are correct. There is no option like II, III AND IV so the coorect answer is B which includes II AND IV. Larger particles can be seperated from smaller particles by sieving. There is a error in the question

Ans 3:

Class : Class 7

Ans 4:

Class : Class 9
Bruhhhh this is so easy wish questions like these were on NSO

Ans 5:

Class : Class 6
D

Ans 6:

Class : Class 8
answer is Only

Ans 7:

Class : Class 7
c is correct not b

Ans 8:

Class : Class 7
Neither of the options is correct. Even solution is not explaining it well. Kindly tell the correct answer because I think that III and IV are correct.

Ans 9:

Class : Class 10
dheeraj, it is alking about that the statement is correct.mud and water can be separated by many ways but it is asking nly about statemnt(whether the mentioned thing in "statement are crrect r not

Ans 10:

Class : Class 9
Larger solid particles are separated from smaller ones by sieving

Ans 11:

Class : Class 7
first option is to wrong

Ans 12:

Class : Class 6
Mud and water can be separated by loading, sedimentation, decantation, AND filtration.So, answer should be B

Ans 13:

Class : Class 8

Ans 14:

Class : Class 6
answer should be d

Ans 15:

Class : Class 7
B is the answer

Ans 16:

Class : Class 7
II,III and IV are correct, none of options are correct and in I it should be sieving/handpicking

Ans 17:

Class : Class 9
answer should be 'd'

Ans 18:

Class : Class 6
but 1st option is incorrect?????????????????????

Ans 19:

Class : Class 7

Ans 20:

Class : Class 6
the question is wrong all the options are correct. it is given in the synopsis that centrifugation is used to separate cream from milk.

Ans 21:

Class : Class 6
(ii) and(iii) are correct whereas the answer to (i) is handpicking and the answer for (iv) is winnowing

Ans 22:

Class : Class 8

Ans 23:

Class : Class 6
BRUHHHHHH i got 20/20 in all tests this is more than easy like NSO

Ans 24:

Class : Class 6
The answer should be B as it is written in the synopsis that cream is separated from milk by centrifugation.

Ans 25:

Class : Class 10
bruh

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
translucent bcz the light is passing partially from the window

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Chromium is more expensive

Ans 2:

Class : Class 9
the people of SOF should be wise but they are acting like dummies.. Its like they don't know that CHROMIUM IS AN EXPENSIVE METAL. IF IT WAS CHEAP WHY WOULD ITEMS NEED TO BE ELECTROPLATED!! BECAUSE OF THIS MISTAKE I LOST A MARK AND IN THE 1ST QUESTION TOO BECAUSE OF THEIR HORRIBLE MISTAKES.. I AM VERY ANGRY NOW.. I MEAN LIKE 2 MISTAKES IN 1 TEST?!?!.. REALLY?!?

Ans 3:

Class : Class 8
In the SOF book, Option B is correct. How come here Option D?

Ans 4:

Class : Class 9

Ans 5:

Class : Class 9
It means that in place of electroplating the object with some other metal like silver ,it is cheaper to electroplate it with chromium

Ans 6:

Class : Class 8
chromium is not cheapif it is cheap then the whole material can be made of chromium, why do they electroplate it if its cheapoption D is wrong and option B is correct

Ans 7:

Class : Class 9
chromium is expensive . so answer should be B

Ans 8:

Class : Class 8
CHROMIUM IS AN EXPENSIVE METAL SO WHOLE OBJECT COULD NOT BE MADE OF IT. SO CORRECT ANSWER SHOULD BE B.

Ans 9:

Class : Class 9
B

Ans 10:

Class : Class 8
Correct answer is B

Ans 11:

Class : Class 10

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Subject :NSO    Class : Class 10

Ans 1:

Class : Class 5
The chicken was born first. Because the formation of egg shell relies upon a protein found only in the chicken's ovaries. Hope you found the answer to your question

Ans 2:

Class : Class 4
bOTH

Ans 3:

Class : Class 5
C.Both

Ans 4:

Class : Class 5
a

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
Correct option is A

Ans 3:

Class : Class 8

Ans 4:

Class : Class 8
Ans.- (A) Gravity always accelerates any body's speed when it is coming towards the earth. g = 9.8 m/s^2

Ans 5:

Class : Class 8
Correct option is A

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 7

Ans 2: (Master Answer)

Class : Class 1

The correct answer is A


Ans 3:

Class : Class 7

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
Option b

Ans 2: (Master Answer)

Class : Class 1

The correct answer is B

The gas having lowest boiling point i.e., highly volatile will be distilled out first and the gas having highest boiling point i.e., least volatile will be distilled out at the last. So, the correct order of gases distilling out is neon, nitrogen, oxygen, krypton.


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4

Ans 2: (Master Answer)

Class : Class 1

The correct answer is B

Here forces X, Y and Z are Friction, Magnetic force and Gravitational force. It is friction which opposes or slows down moving objects


Ans 3:

Class : Class 5
Can't understand question.....

Ans 4:

Class : Class 3

Ans 5:

Class : Class 3

Ans 6:

Class : Class 4

Ans 7:

Class : Class 7
not understanded

Ans 8:

Class : Class 3
I don't understand this question..!!

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 7
The Correct answer is A dungbeetles, as they help us in removing dung from the road

Ans 2: (Master Answer)

Class : Class 1

Dung beetle is a helpful insect that helps in dispersing dung


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