National Science Olympiad Forum By SOF Olympiad Trainer - Page 701

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
a is correct one

Ans 2:

Class : Class 6
as the magnetic field near the ends/poles is strong ,the number of iron nails attracted will be more near the poles and less near the centre

Ans 3:

Class : Class 8

Ans 4:

Class : Class 9
a is correct answer

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Please explain

Ans 2:

Class : Class 8
The letters are rearranged in descending order PENCIL -> PNLIEC ANGLE -> NLGEA

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Subject :NSO    Class : Class 1

Ans 1:

Class : Class 5
8

Ans 2:

Class : Class 2
ans is 8

Ans 3:

Class : Class 5
a

Ans 4:

Class : Class 1

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
ans 6 is use less

Ans 2:

Class : Class 10
Melting of ice

Ans 3:

Class : Class 9
melting of ice is a physical change but why not others? they are to!

Ans 4:

Class : Class 9
melting of ice

Ans 5:

Class : Class 6
Melting of ice

Ans 6:

Class : Class 9
melting of ice

Ans 7:

Class : Class 4
MELTING OF ICE IS THE ONLY PHYSICAL CHANGE IN THE GIVEN OPTIONS. OTERS ARE CHEMICAL CHANGE.

Ans 8:

Class : Class 8
they are mads

Ans 9:

Class : Class 8

Ans 10:

Class : Class 9

Ans 11:

Class : Class 8
Answer D : All of these

Ans 12:

Class : Class 7

Ans 13:

Class : Class 5
Class :Easy

Ans 14:

Class : Class 7
Only melting of ice cube can be again turned to it's original form

Ans 15:

Class : Class 9
All of you are correct in one sense but in other sense if we look i think all of these is the answer

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 1
Ans 16 is wrong

Ans 2:

Class : Class 9
It will be D as it says that the jar contains 400 cm3 air and if a 50 cm3 syring filled with air is put into the jar it will become 450 cm3 400 50 = 450 cm3.

Ans 3:

Class : Class 5
Ok c is answer.

Ans 4:

Class : Class 4
ans is D

Ans 5:

Class : Class 10
air can be compressed .

Ans 6:

Class : Class 9
Correct answer is C because air can be compressed. You don't need to add 400 and 50 because air can be compressed

Ans 7:

Class : Class 8

Ans 8:

Class : Class 6
As air can be compressed and takes up the volume of container, its final volume in the jar will be 400 cm3.

Ans 9:

Class : Class 7
D

Ans 10:

Class : Class 8
Ans is c

Ans 11:

Class : Class 5
I thought it would be C but after profound thinking I realised that the answer would be D

Ans 12:

Class : Class 8
you all are coreect

Ans 13:

Class : Class 5
the correct answer is c because the volume of the jar is 400cm3

Ans 14:

Class : Class 5
D

Ans 15:

Class : Class 5
D

Ans 16:

Class : Class 5
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Ans 17:

Class : Class 5
plz dont be angry. The volume of the glass jar will not change. it will remain the same as it is not flexible. so if we compress air of 50cm3 the volume will decrease. But air occupies the available space. So, the correct answer is C.

Ans 18:

Class : Class 8
It was forced out of the tank so it went out and the thing is 50cm³ so 400-50 50=400So the answer is 400cm³

Ans 19:

Class : Class 5
air can be compressed and it would be 450 cm3 answer is d

Ans 20:

Class : Class 7
hello

Ans 21:

Class : Class 7

Ans 22:

Class : Class 7
d

Ans 23:

Class : Class 9
yes all please understand sorry if i am wrong it compress the air dear children it wont increase t decreases

Ans 24:

Class : Class 6

Ans 25:

Class : Class 6
the answer is d

Ans 26:

Class : Class 4
d won't be the correct answer. the answer is c as air can be compressed.

Ans 27:

Class : Class 4
Sof pls give us a GOOD explanation. Ans is d.

Ans 28:

Class : Class 6
C

Ans 29:

Class : Class 7
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 30:

Class : Class 6

Ans 31:

Class : Class 5
Class : easy

Ans 32:

Class : Class 4
the question says what is the total volume of AIR in the jar, so as air can be compressed then it should obviously contain 450cm3 and I never heard of glass being flexible in other words the 50cm3 of air in the jar is not going to disappear or fly away so ans is D

Ans 33:

Class : Class 5
The volume of the JAR is 400 cm3 . If we insert air in the jar, the VOLUME OF THE JAR will remain the same as it is mentioned that the JAR IS COMPLETELY MADE OF GLASS, which is not flexible. Therefore, the answer is C .......

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
I q

Ans 2:

Class : Class 7
x is put in a vase of 30 ml water . then it becomes 50 ml . so , volume of x is 50 - 30 i.e. 20 ml . then after adding y , it becomes 75 ml . then , y is 75 - 50 i.e. 25 ml . both are less than 30 ml . so , the correct answer is C . understood ?

Ans 3:

Class : Class 6
When Y is put it looks like it rose from 50 to 70.

Ans 4: (Master Answer)

Class : Class 1

Ans 5:

Class : Class 9
yes dear B and C are correct SOF is wrong my dear kids please dont fight

Ans 6:

Class : Class 7
B

Ans 7:

Class : Class 8
option c is wrong only y has 25ml volume and x has 50ml , z also has 50 ml of volume so , option b is correct

Ans 8:

Class : Class 4
x=20 and y= 25 read the last line of the question and you will find out

Ans 9:

Class : Class 10
DEFINITELY IT IS B

Ans 10:

Class : Class 5
Both B and C are right so please don’t quarrel

Ans 11:

Class : Class 5
ANSWER is c as many people don't see that the container already had 30 ml of water

Ans 12:

Class : Class 7
B is the correct answer.

Ans 13:

Class : Class 8
B is 25ml which is less than 30 ml ... B is the answer

Ans 14:

Class : Class 10
Yajat is correct because if you read the question carefully , it is written '30 ml of watter' which means that it was already filled with 30 ml of water. now x=50-30=20cm3 and y =75 - 50 = 25 mlSo correct option is c.

Ans 15:

Class : Class 6
When you put R on the surface you will find that it does not weigh more than 30 units.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
I like this question

Ans 2:

Class : Class 5
Well, The question is tricky and it needs critical thinking. I thought B but it was D........surprising!

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
The answer is C because air and water can be compressed

Ans 2:

Class : Class 5

Ans 3:

Class : Class 9
The answer is C as the material P is compressed as shown in the picture related to that air is compressible while water is diificult to compress with respect to material Q.

Ans 4:

Class : Class 5
Absolutely, Rimi! You were right all along. I had some trouble grasping the solution at first, but your explanation really helped me understand it much better. Thank you!

Ans 5:

Class : Class 2

Ans 6:

Class : Class 5
c

Ans 7:

Class : Class 7
Ccccccccccccccccccccc ccccccccccccccccccccccccccccc

Ans 8:

Class : Class 5

Ans 9:

Class : Class 5

Ans 10:

Class : Class 2

Ans 11:

Class : Class 8

Ans 12:

Class : Class 2

Ans 13:

Class : Class 7

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
there are too many silly errors in your papers like these. i am tired of writing complaints again and again. you better respond to this quickly. the explanation you have given in solution is correct but the answer is wrong. it should be 'a' and not 'b'.

Ans 2:

Class : Class 7
The correct answer will be A as Milky Way is a spiral-shaped galaxy and one revolution of the Earth is completed in about 365.25 days and this time period is called a solar year.

Ans 3:

Class : Class 6
Please stop these kind of mistakes. I have given many complaints.

Ans 4:

Class : Class 8
Excuse me. The answer is not b, its a. They say it themselves in the solution. I suppose it's a mistake

Ans 5:

Class : Class 6
They are asking for the CORRECT answer so its A

Ans 6:

Class : Class 9

Ans 7:

Class : Class 10

Ans 8:

Class : Class 10
I think the question was wrong as they ate showing incorrect statements. This means the question was like this. Which of the following statements are incorrect?

Ans 9:

Class : Class 9
Answer is A NOT b

Ans 10:

Class : Class 10
ANSWER IS A, NOT B AS THE QUESTION SAYS TO CHOOSE THE CORRECT OPTION AND NOT INCORRECT OPTION.

Ans 11:

Class : Class 8
(i) Milky Way is a spiral-shaped galaxy. --- Corrrect (ii) Planet Venus has 63 Moons. -------------Wrong ( it does not have moons) (iii) Satellites are small heavenly bodies that revolve around the Sun. --Wrong (they revolve around planets) (iv) One revolution of the Earth is completed in about 365 1/4 days. This time period is called a solar year. --Correct Therefore correct option is (A)

Ans 12:

Class : Class 9
the question must be wrong.

Ans 13:

Class : Class 9
The answer is A

Ans 14:

Class : Class 10
please correct the mistake as the question says that which is the correct option instead of incorrect.

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