National Science Olympiad Forum By SOF Olympiad Trainer - Page 592

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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: (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 2:

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

Ans 3:

Class : Class 7
the ans will be c

Ans 4:

Class : Class 8
thanks admin for the explanation

Ans 5:

Class : Class 8

Ans 6:

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

Ans 7:

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

Ans 8:

Class : Class 7
in short words this was easy

Ans 9:

Class : Class 10
i did not understand the question

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Subject :NSO    Class : Class 6

Ans 1:

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

Ans 2:

Class : Class 9

Ans 3:

Class : Class 8

Ans 4:

Class : Class 9
c

Ans 5:

Class : Class 6
c

Ans 6:

Class : Class 7
c

Ans 7:

Class : Class 9
The answer should be (d),not (c).

Ans 8:

Class : Class 9

Ans 9:

Class : Class 7
The answer is c

Ans 10:

Class : Class 7

Ans 11:

Class : Class 7
ty

Ans 12:

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 13:

Class : Class 7
c

Ans 14:

Class : Class 4
c

Ans 15:

Class : Class 9
C is correct

Ans 16:

Class : Class 8

Ans 17:

Class : Class 7

Ans 18:

Class : Class 10

Ans 19:

Class : Class 7

Ans 20:

Class : Class 10

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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: (Master Answer)

Class : Class 1
Kindly mention your query

Ans 2:

Class : Class 7
The answer is C!!!

Ans 3:

Class : Class 7
The answer is C!!!

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5
ans b

Ans 3:

Class : Class 4
it should be D

Ans 4:

Class : Class 8

Ans 5:

Class : Class 5

Ans 6:

Class : Class 6
the answer is B

Ans 7:

Class : Class 7
Tricky , hard and somewhat funny .

Ans 8:

Class : Class 7
B is the answer to this question

Ans 9:

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

Ans 10:

Class : Class 5
it is saying select the correct option for me

Ans 11:

Class : Class 9

Ans 12:

Class : Class 2
confussing

Ans 13:

Class : Class 9
B

Ans 14:

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 15:

Class : Class 8

Ans 16:

Class : Class 5
best

Ans 17:

Class : Class 9

Ans 18:

Class : Class 7
B

Ans 19:

Class : Class 8

Ans 20:

Class : Class 4
B

Ans 21:

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

Ans 22:

Class : Class 8

Ans 23:

Class : Class 8
ANSWER IS B

Ans 24:

Class : Class 7
B is the answer to this question

Ans 25:

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

Ans 26:

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 27:

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 28:

Class : Class 5
B

Ans 29:

Class : Class 9

Ans 30:

Class : Class 6
b

Ans 31:

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

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Subject :NSO    Class : Class 3

Ans 1:

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

Ans 2:

Class : Class 4
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 3:

Class : Class 7
Admin ka bacha it is a

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 7
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 7: (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 8:

Class : Class 9
answer should be A.

Ans 9:

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

Ans 10:

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

Ans 11:

Class : Class 3
But in the book its a

Ans 12:

Class : Class 4
many questions are wrong sof some children will think that is only correct and get less marks due to your fault .

Ans 13:

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 14:

Class : Class 5

Ans 15:

Class : Class 4
The correct answer is A.

Ans 16:

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

Ans 17:

Class : Class 5

Ans 18:

Class : Class 4
a

Ans 19:

Class : Class 3
rrrrrrrrrrrrriight for meee

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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

Ans 3:

Class : Class 8
The correct option is B

Ans 4:

Class : Class 8
The correct option is B

Ans 5:

Class : Class 8
A

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 8
No, i think it's c

Ans 2:

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

Ans 3:

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.

Ans 4:

Class : Class 9
the answer is C

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