National Science Olympiad Forum By SOF Olympiad Trainer - Page 659

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 5
the answer is d

Ans 3:

Class : Class 8
I think B and D is correct.

Ans 4:

Class : Class 4
D is correct

Ans 5:

Class : Class 4
NONE of these is the correct answer

Ans 6:

Class : Class 9
D is correct

Ans 7:

Class : Class 2

Ans 8:

Class : Class 7
yes you are right

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
Hydrocloric acid is very corrosive and reacts with metals . So HCL is stored in glass bottles because it dont causes damage to it . ..........SO 3 statement should be true and their explanation is wrong .

Ans 2:

Class : Class 7
Q is wrong since option 1 is false, rest all are true

Ans 3:

Class : Class 8
Hydrochloric acid reacts with metals and corrodes them and is therefore stored in glass bottles... This question is wrong and so is the explanation.

Ans 4:

Class : Class 7
Yes, I also agree. HCl is a strong acid and reacts with metals almost exactly like H2S04, it is also stored in glass for this reason, question is wrong.

Ans 5:

Class : Class 10
Hcl doesnt react with glass. The explanation is wrong

Ans 6:

Class : Class 10
Hcl doesen't react with metals......Sulphuric acid does

Ans 7:

Class : Class 8

Ans 8:

Class : Class 10
Hcl reacts with metals also

Ans 9:

Class : Class 8
Inorganic acids such as minerals acid like HCL , H2SO4 etc . Are. Not always made in factories . HCL is produced in our stomach.

Ans 10:

Class : Class 8
I completely agree... The HCl reacts with metals , which is major reason of why HCl is stored in glass bottles..

Ans 11:

Class : Class 5
You all are correct

Ans 12:

Class : Class 6
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 13:

Class : Class 8
hcl reacts with metals too

Ans 14:

Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
i gave the correct answer but in the result they are showing that it is wrong.it is the same case with some other questions too.Please make a note that you correct it,thank you.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7

Ans 2:

Class : Class 10

Ans 3:

Class : Class 7
Stapler ( option D ) is the odd one out as it is a third class lever i.e. effort is between the load and fulcrum .

Ans 4:

Class : Class 5

Ans 5:

Class : Class 3
D

Ans 6:

Class : Class 7
The answer is D because the stapler is the odd one out

Ans 7:

Class : Class 6
according to Google stapler is a third-class lever

Ans 8:

Class : Class 6
option D is correct because stapler is 3rd class lever

Ans 9:

Class : Class 9

Ans 10:

Class : Class 5
yes because the stapler is a third class lever

Ans 11:

Class : Class 6
What is type of Option A?

Ans 12:

Class : Class 5
Yes option d is correct

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
I was thinking about body building food

Ans 2:

Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
The correct answer is B because manure is soluble in water but it is absorbed very slowly

Ans 2:

Class : Class 8
A

Ans 3:

Class : Class 10
it is A as fertilizers are soluble in water. You might have heard that fertilizers flow into the river and cause eutrophication it flows into river because it is soluble in water

Ans 4: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
A

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 8
D

Ans 2:

Class : Class 3
i m not getting the answer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10
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Ans 2:

Class : Class 3
The answer is right - it should be T/10

Ans 3:

Class : Class 4
yes I also agree with you

Ans 4:

Class : Class 6
throughout the time period or the 21 swings the pendulum will pass through the point Y 21 times. so the answer is B(t/21)

Ans 5:

Class : Class 6

Ans 6:

Class : Class 8

Ans 7:

Class : Class 6
It should be T/21 only as T is the total time and no of times it passes Y is 21.Therefore the answer is T/21

Ans 8:

Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 9:

Class : Class 9
Yes it should be t/10 as the pendulum will pass through point y twice in its one revolution...... so the the time period should be t/10

Ans 10:

Class : Class 8
Hi The Answer is T/10Sub To my YT:SkyPeRtan Wolf

Ans 11:

Class : Class 9

Ans 12:

Class : Class 6
it should be t/21

Ans 13:

Class : Class 7
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Ans 14:

Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 15:

Class : Class 8
Here, in this example, the pendulum passes through y 21 times. So, it will do 10 complete oscillations and 1 half which is basically touching y. Therefore, the time period of the pendulum is T/10.

Ans 16:

Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 17:

Class : Class 7
I agree with you

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