National Science Olympiad Forum By SOF Olympiad Trainer - Page 694

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
Actually,water does not ''Precipitate'' to form clouds.As long as my memory tells me, water ''Condenses'' to form clouds.

Ans 2:

Class : Class 7
D is right too right

Ans 3:

Class :
yes a is the correct answer

Ans 4:

Class : Class 9

Ans 5:

Class : Class 10

Ans 6:

Class :
a is write

Ans 7:

Class : Class 7
As far as I know, raining (precipitating) does not yield clouds. condensation does.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

Ans 1:

Class :
correct answer is B

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Subject :NSO    Class : Class 8

Ans 1:

Class :
Venus

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
This question is absolutely wrong

Ans 2:

Class : Class 8

Ans 3:

Class : Class 10
Wrong question

Ans 4:

Class : Class 8
it is completely wrong

Ans 5:

Class : Class 8
Firstly, the image itself is totally different from that of the options. None of the options actually fit the image. So, either there should be a "None of these" option or there should be a different image in which at least one option fits. I ask SOF to kindly make the needed changes.

Ans 6:

Class : Class 7
Wrong Question

Ans 7:

Class :
THAT DOESN'T MAKES SENSE

Ans 8:

Class : Class 5
wrong question

Ans 9:

Class : Class 8
this is wrong . all the options are wrong .

Ans 10:

Class : Class 8
Completely wrong image in the question, it makes no sense

Ans 11:

Class :
none of the options are correct.

Ans 12:

Class : Class 9
wrong ques

Ans 13:

Class : Class 9
Absolutely Right question matches with the image in question

Ans 14:

Class : Class 7

Ans 15:

Class : Class 9
Wrong question. NICE

Ans 16:

Class : Class 9
yes wrong ques

Ans 17:

Class : Class 9
It is meaningless

Ans 18:

Class : Class 8

Ans 19:

Class : Class 7

Ans 20:

Class : Class 10
None of the options are correct.

Ans 21:

Class : Class 7
this is wrong

Ans 22:

Class : Class 8
Senseless question, wrong question and totally different solution. I am disappointed as there are many mistakes.

Ans 23:

Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class :
AN INSULATOR (C)

Ans 2:

Class :
Wood is a bad conductor of heat. This results in very slow heating of wood. This principle is used when we use wood utensils to cook food. I go by option (B).

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 6
how can a plant release carbondioxide???

Ans 3:

Class :
D I guess,I am not sure

Ans 4:

Class : Class 9

Ans 5:

Class : Class 4
plants can release carbon dioxide at night only tulsi plant does not release carbon dioxide

Ans 6:

Class : Class 7
Option D

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Subject :NSO    Class : Class 7

Ans 1:

Class :
IT IS 'D' BECAUSE AT COCOON STAGE THE CATERPILLAR PRODUCES SILK FIBRES AND KNOTS AROUND IT AND COVERS HIMSELF.AFTER SOME TIME THE SILK FIBRES GETS HARDEN DUE TO THE GUMMY SUBSTANCE WHICH THE CATERPILLAR PRODUCES............IT IS CALLED "FIBROIN" WHICH IS MADE UP OF PROTEINS.ON HEATING THE COCOONS IN WATER THE SILK AGAIN BECOMES SOFT AND IS EXTRACTED FROM COCOONS........THIS PROCESS IS CALLED "REELING OF SILK"

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
admin please answer

Ans 4:

Class : Class 8
The answer is C as at that time of a Silkworms life it will produce silk. With that silk they will make a cacoon and then they will become a Moth. While it is a Pupa it does not have the ability to make Silk hence the answer is C

Ans 5:

Class : Class 8
This is a trick question.. It says 'produced', not 'obtained'.. The larvae produce the silk fibre, then it is obtained from cocoon..

Ans 6:

Class : Class 8
answer is c because in the pupa stage the silk is already produced and in the larvae stage it produces silk when it is ready to go in the next stage of its life

Ans 7:

Class :
No, the answer is 'C' only. In pupa stage the silk fiber is only obtained, but actually it is produced by larva and in question it is asked which stage produces fiber. Hence, the answer is 'C".

Ans 8:

Class : Class 9
it is c because the silk has already started getting produces when it is larva

Ans 9:

Class :
it must be c . at cocoon stage silk is already produced

Ans 10:

Class :
as larva produces and when it is fully produced it forms a cocoon

Ans 11:

Class : Class 9

Ans 12:

Class :
I thought the silk is obtained from the cocoon

Ans 13:

Class : Class 8
OPTION C

Ans 14:

Class :
no it is c

Ans 15:

Class : Class 9
Answer should be C ,as only larvae in the life cycle of moth produce silk fibres , pupa or cocoon does NOT make silk fibres . They only undergo change in stage IN the silk fibres. They do not have the ability to produce silk fibres !

Ans 16:

Class :
the answer is d only in the cocoon stage they are heated in the hot water so that the reproducing caterpillar will die and it will be very easy to extract silk fiber from it.

Ans 17:

Class :
ans:c,you may think d,but only in larval stage it produce silk in option d it is in a cocoon stage it cannot produce silk

Ans 18:

Class : Class 9
also felt d but explanation provided above makes me feel c

Ans 19:

Class : Class 9
Ans C

Ans 20:

Class : Class 10
really confusing ... the answer option d is correct in the sense that produces means extracting the silk or when it is ready to extracted by humans. but option c is correct when produces means that when larva , itself after the fourth moult stage produces silk.

Ans 21:

Class : Class 8
I THINK THE ANSWER IS C

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
c

Ans 2:

Class : Class 6
@Aditya Kumble Same

Ans 3:

Class : Class 7
how dumb am i thought c wrote d

Ans 4:

Class :
C

Ans 5:

Class : Class 7
CEZY PZY LEMONS SQUEEZY PIZA CHEEZY

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
The correct answer is B.

Ans 2:

Class : Class 8

Ans 3: (Master Answer)

Class :
The correct answer is B.

Ans 4:

Class : Class 9

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