National Science Olympiad Forum By SOF Olympiad Trainer - Page 434

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Subject :NSO    Class : Class 6

Three different types of materials X, Y and Z were used in the experiment shown below here. In both circuits, the bulbs lighted up.

Another different circuit was set up and three of the materials were placed at three different positions, Q1, Q2 and Q3.

Based on the above circuits, which one of the following is wrong?
Positions in the circuit--- Light bulbs

Q1 Q2 Q3 B1 B2 B3
A X Y Z No Yes No
B Y Z X Yes Yes No
C Z X Y Yes No Yes
D X Z Y No No No


not understanding

Ans 1:

Class : Class 3
And is A since X is insulator it doesn't allow electricityTo pass through so nothing glows

Ans 2:

Class : Class 7
ANSWER IS B

Ans 3:

Class : Class 10
The answer is C as if assume x as a insulator , all other condition satisfy

Ans 4:

Class : Class 10

Ans 5:

Class : Class 5
someone please explainnnnn

Ans 6:

Class : Class 6
Very good question. Here object X is a insulator but the bulbs glow up because of parallel connection of circuit. So according to that, option A is wrong and is the correct answer.

Ans 7:

Class : Class 6
Answer supposed to be b

Ans 8:

Class : Class 7
Read the question carefully kids!

Ans 9:

Class : Class 7
It says which one is wrong, not right

Ans 10:

Class : Class 7
Can someone explain it ,please??

Ans 11:

Class : Class 10

Ans 12:

Class : Class 7
plz answer

Ans 13:

Class : Class 3
pls explain

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Option D is the right answer

Ans 2:

Class : Class 7
Wrong answer provided . Even the solution says answer d

Ans 3:

Class : Class 7
Q also can be cockroach. Thus in my OPINION C can also be the answer

Ans 4:

Class : Class 7
Forget about the Option C. Option D is the right answer.

Ans 5:

Class : Class 7
Answer is C

Ans 6:

Class : Class 7

Ans 7:

Class : Class 9
The answer has to be D because they have asked for the incorrect option

Ans 8:

Class : Class 9
Answer should be D. Solution provided by them says so too.

Ans 9:

Class : Class 7
Option D is the right answer. The Solution also tells the same then how can they say our answer is wrong?? Try putting this question in the "ERROR" box

Ans 10:

Class : Class 4
answer should be A. They have asked for the INCORRECT OPTION and A is incorrect. Earthworm uses skin not trachea. The answer is A. It also appears in my solution

Ans 11:

Class : Class 7
but the question says to choose incorrect answer

Ans 12:

Class : Class 8
eplanation given is correct but answer is option d

Ans 13:

Class : Class 8
Its Option D

Ans 14:

Class : Class 7
Option D

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
both b and d are correct.

Ans 2:

Class : Class 10
The correct answer is option B . A compass may be used to find East and west direction . Once you find North and South , by facing north , the right side will be East and left one will be West

Ans 3:

Class : Class 6
Also, d is right. Attraction is a sure test for magnetism. both b and d are right. Compromised?

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Please correct it

Ans 2:

Class : Class 8
as per Wikipedia no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 3:

Class : Class 6

Ans 4:

Class : Class 7
2 and 4 is the answer to this question

Ans 5:

Class : Class 5
How is 1 correct? Please reply

Ans 6:

Class : Class 9
no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

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Subject :NSO    Class : Class 5

Study the given passage.
X, Y and Z are different parts of the brain. X controls musculo-skeletal movement, Y controls learning ability and memory and Z controls activities such as breathing, heartbeat and blood circulation. Identify X, Y and Z and select the incorrect statement regarding them.

AX is the largest part of the brain whereas Z connects the brain to spinal cord.
BY is the upper part of brain also controls our sense organs.
CZ is also called brain stem and it works even when we are asleep.
DX is located below Y towards the back of the brain.


Ans 1:

Class : Class 8
This question is correct

Ans 2:

Class : Class 7
THERE CHECKING IS WRONG AS ANSWER IS C

Ans 3:

Class : Class 6
cerebrum is the largest part of the brain. cerebellum is the second largest part and it controls musculo-skeleton movement

Ans 4:

Class : Class 5

Ans 5:

Class : Class 7
B is the answer to this question but it is showing A as correct option and it is showing B as correct option in the solutions.

Ans 6:

Class : Class 3
This is absolutely correct as y is cerebrum and x is. EllThis Is absolutely correct as y is cerebrum X is cellebellum and Z is the Medulla ✅✅✅✅

Ans 7:

Class : Class 5
Both A and C are correct

Ans 8:

Class : Class 4

Ans 9:

Class : Class 6
Correct answer should be d because cerebellum is below cerebrum, located towards the back of the brain.

Ans 10:

Class : Class 6
this question is wrong

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Subject :NSO    Class : Class 3

Which of the following holds true for water transport?
1. It provides door to door service.
2. Perishable goods like milk, fruits and vegetables are quickly carried by it.
3. It is very useful for transporting heavy and bulky goods.
4. It is a better mode of transportation for petroleum and its products as it involves crosscontinental transfers.
5. It is very useful at the time of natural or any other calamities for saving people or supplying goods of their basic requirements immediately.

A 3 and 4
B 1, 2 and 5
C 2, 3 and 4
D 4 and 5


Ans 1:

Class : Class 6
A

Ans 2:

Class : Class 3
A

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 5

Ans 2:

Class : Class 7
please explain. your solution doesn't match the correct answer provided by you.

Ans 3:

Class : Class 10

Ans 4:

Class : Class 6
The answer does not match with the solution. There should be a change in the answer.

Ans 5:

Class : Class 7
Given correct answer and explanation do not match...please rectify...

Ans 6:

Class : Class 7

Ans 7:

Class : Class 7
they aren't giving the answer and the solution same in some papers

Ans 8:

Class : Class 6
Pls rectify.

Ans 9:

Class : Class 3

Ans 10:

Class : Class 3
ayush u are right!!!!!!!!!!!!!!!

Ans 11:

Class : Class 8
The ans is not matching!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 12:

Class : Class 4
The option selected here is wrong.

Ans 13:

Class : Class 4
What is this? Answer and solution are completely different, they are not matching!

Ans 14:

Class : Class 6
The correct is NSN

Ans 15:

Class : Class 4

Ans 16:

Class : Class 8
YES , their answer is not matching with their solution !!

Ans 17:

Class : Class 9
yes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 18:

Class : Class 10
clear objection

Ans 19:

Class : Class 7
why arent they changing the answer

Ans 20:

Class : Class 6

Ans 21:

Class : Class 9

Ans 22:

Class : Class 6
Although the explanation is correct, it does not match the answer

Ans 23:

Class : Class 6
NA

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
According to definition - answer would be 0.2 s

Ans 2:

Class : Class 7
The answer is wrong. It is 0.2

Ans 3:

Class : Class 7
wrong answer. should be 0.2s

Ans 4:

Class : Class 10
According to definition - answer would be 0.2 s

Ans 5:

Class : Class 10
the answer is wrong , it should be 0.2s. please kindly provide the solution to this question.

Ans 6:

Class : Class 6

Ans 7:

Class : Class 8
I think this answer is wrong. It should be 0.2 seconds, according to the definition of a Time Period in oscillatory motion.

Ans 8:

Class : Class 10
answer is wrong it should be 0.2 s

Ans 9:

Class : Class 6
The answer should be 0.2 s

Ans 10:

Class : Class 7

Ans 11:

Class : Class 7
I THINK IT COMPLETES 25 OSCILLATIONS IN 5s

Ans 12:

Class : Class 4
Answer is wrong

Ans 13:

Class : Class 6
The answer has to be 0.2 seconds(5/25). Pls correct

Ans 14:

Class : Class 9
the answer is wrong

Ans 15:

Class : Class 7

Ans 16:

Class : Class 7
The answer seems to be wrong. 5 seconds to complete 25 oscillations. That means for one oscillation it is 5/25 = 0.2 seconds. 'Period' usually means one complete oscillation that is 0.2 seconds and that is not given.

Ans 17:

Class : Class 7
The time taken to complete one oscillation - a left swing and a right swing - is called the time period (T); it is measured in seconds.A swing takes 5 seconds to complete 25 oscillations. That means it would take 1 second to complete 25 ÷ 5 = 5 oscillations. That also means it would take 1 ÷ 5 = 0.2 seconds to complete 1 oscillation.So, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 18:

Class : Class 8
please explain the answer

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5
C

Post Your Answer

Subject :NSO    Class : Class 7