National Science Olympiad Forum By SOF Olympiad Trainer - Page 632

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Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

Class : Class 1
Here, the correct answer is A. In (A), the incident rays are diverged after refraction, so the lens is concave and in (B), the incident rays are converged after refraction, so the lens is convex.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
the ans will be c

Ans 2:

Class : Class 6
Why are there maths questions in science paper?????

Ans 3:

Class : Class 8
thanks admin for the explanation

Ans 4:

Class : Class 7
in short words this was easy

Ans 5:

Class : Class 9
WHAT IS THE CLASS THIS IS LIKE MATHS

Ans 6:

Class : Class 9
WHAT IS THE CLASS THIS IS LIKE MATHS

Ans 7:

Class : Class 10
i did not understand the question

Ans 8: (Master Answer)

Class : Class 1
Here, the answer is C. Displacement is the shortest distance covered by a body. In a circular path, the distance between the initial point (Here=P) and the final point (Here=Q) will give you the displacement. Here, Shortest distance between P and Q is PO + OQ = a + a = 2a Hence, the displacement of the cyclist would be 2a.

Ans 9:

Class : Class 8

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10

Ans 2:

Class : Class 6
Answer is C because Y is minerals.Minerals are inorganic.Excess consumption of minerals does not cause obesity.So they have told to mark incorrect answer.Therefore C is correct

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7
ty

Ans 5:

Class : Class 7

Ans 6:

Class : Class 9

Ans 7:

Class : Class 7
c

Ans 8:

Class : Class 7
c

Ans 9:

Class : Class 9
Can anyone explain what 'inorganic elements' are?

Ans 10:

Class : Class 9
c

Ans 11:

Class : Class 9

Ans 12:

Class : Class 10

Ans 13:

Class : Class 8

Ans 14:

Class : Class 4
c

Ans 15:

Class : Class 10
The answer should be (d),not (c).

Ans 16:

Class : Class 7
The answer is c

Ans 17:

Class : Class 6
c

Ans 18:

Class : Class 9
C is correct

Ans 19:

Class : Class 7

Ans 20:

Class : Class 8

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Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Class : Class 1
Here, the answer is B. Since in a magnetic needle the arrow head is the North Pole, it will point towards the South Pole of the left hand side magnet and the other end of the magnetic needle (i.e; South Pole) will point towards the North Pole of the right hand side magnet.This is because like poles repel and unlike poles attract each other. Hence,the polarity of the end P of the right hand side magnet is North.

Ans 2: (Master Answer)

Class : Class 1
Here, the answer is B. Since in a magnetic needle the arrow head is the North Pole, it will point towards the South Pole of the left hand side magnet and the other end of the magnetic needle (i.e; South Pole) will point towards the North Pole of the right hand side magnet.This is because like poles repel and unlike poles attract each other. Hence,the polarity of the end P of the right hand side magnet is North.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
The answer is C!!!

Ans 2:

Class : Class 7
THE ANS IS B

Ans 3: (Master Answer)

Class : Class 1
Kindly mention your query

Ans 4:

Class : Class 7
The answer is C!!!

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Tricky , hard and somewhat funny .

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
the answer is B

Ans 4:

Class : Class 8

Ans 5:

Class : Class 5
ans b

Ans 6:

Class : Class 5
best

Ans 7:

Class : Class 4
B

Ans 8:

Class : Class 9

Ans 9:

Class : Class 5
The answer is D A-It is false B- Typhoid and cholera are caused by polluted water, but diabetes isnt. C- It is true that organic and inorganic pollutants cause dissolved oxygen level to decrease D- Agricultural runoffs can contaminate both groundwater and surface water

Ans 10:

Class : Class 9

Ans 11:

Class : Class 9
It is B as the question is "Select the INCORRECT option"Diabetes is not cased by water pollution so the answer is B

Ans 12:

Class : Class 6
it is saying select the correct option for me

Ans 13:

Class : Class 7
B is the answer to this question

Ans 14:

Class : Class 9

Ans 15:

Class : Class 2
confussing

Ans 16:

Class : Class 7
B is the answer to this question

Ans 17:

Class : Class 8

Ans 18:

Class : Class 5
how is diabetes caused through dirty or polluted water?

Ans 19:

Class : Class 5

Ans 20:

Class : Class 8
The question says choose the 'Incorrect' option

Ans 21:

Class : Class 8
ANSWER IS B

Ans 22:

Class : Class 5
B

Ans 23:

Class : Class 6
b

Ans 24:

Class : Class 4
not B for sure as diabetes is not caused due to water pollution

Ans 25:

Class : Class 6
I KNEW ABOUT TYPHOID AND CHOLERA BUT I didn't Knew about diabetes

Ans 26:

Class : Class 9
How is it B, we are just learning in school abt germs and diseases and it doesn’t say anything abt diabetes caused by polluted, this is answer is wrong

Ans 27:

Class : Class 7
B

Ans 28:

Class : Class 4
it should be D

Ans 29:

Class : Class 8

Ans 30:

Class : Class 9
B

Ans 31:

Class : Class 8

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
no lack of food and air we die

Ans 2:

Class : Class 1
The correct answer is A.

Ans 3: (Master Answer)

Class : Class 1
Here, the answer is B. Air, water and food are necessary for the survival of any living organism. So, in the absence of any one of these components an organism cannot survive. Hence, the grasshopper died due to the lack of air and food, although water was provided.

Ans 4:

Class : Class 7
Admin ka bacha it is a

Ans 5:

Class : Class 5

Ans 6:

Class : Class 3
But in the book its a

Ans 7:

Class : Class 4
If it is food then grasshopper will die after 2,3 days but it is writen after some times so it is a

Ans 8:

Class : Class 4
a

Ans 9:

Class : Class 5

Ans 10:

Class : Class 3
awnser will be A because air is mch important then food and water.

Ans 11:

Class : Class 4
Without air(oxygen) the grasshopper will die even food or water is given,so answer is A.

Ans 12:

Class : Class 3
rrrrrrrrrrrrriight for meee

Ans 13:

Class : Class 1
many questions are wrong sof some children will think that is only correct and get less marks due to your fault .

Ans 14:

Class : Class 8
question is about sealed glass box,so there is no supply of oxygen,hence answer is 'a' only.

Ans 15:

Class : Class 8
Air , water and food are essential for living things to survive on Earth. Therefore, in the absence of anyone of these an organism will die. Hence, the the grasshopper will die in the absence of air and food although water was provided in the sealed glass tank. Hence, option(b) is the correct answer.🦗

Ans 16:

Class : Class 1
there are 3 things needed in life air water and food without air we die in minutes without water we die in hours without food we die in days in the picture it is given as water is given to grasshopper and in question it is given as the grasshopper is in sealed and died after some time only so no food and air is given but as i told after some time grasshopper will die due to lack of air only ans sof you can check your mtg workbook also .

Ans 17:

Class : Class 9
SAIKARAN and kailash patra, you are right . SOF , check your book (if you have any left) .

Ans 18:

Class : Class 9
answer should be A.

Ans 19:

Class : Class 6
In the book it is given a as answer, then why b in trainer why why why?

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
The right one is option 'A'-30 mins

Ans 2:

Class : Class 8
A

Ans 3:

Class : Class 8

Ans 4:

Class : Class 8
The correct option is B

Ans 5:

Class : Class 8
The correct option is B

Ans 6:

Class : Class 8
The correct option is B

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Due to deficiency of Calcium.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
the answer is C

Ans 2:

Class : Class 8
No, i think it's c

Ans 3:

Class : Class 6
Answer should be C as excess food is wastage.

Ans 4:

Class : Class 10
No, the answer for this is C and D .reason for answer D is excess of food leads to loss of nutrients especially Vitamin C. answer C because it is necessary to preserve pulses, grains otherwise they will rot.

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