National Science Olympiad Forum By SOF Olympiad Trainer - Page 648

# User Forum

Subject :NSO    Class : Class 5

Class : Class 5
Class : easy

## Ans 2:

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 3:

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.

Class : Class 4
ans is D

Class : Class 6
C

## Ans 6:

Class : Class 7
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

## Ans 7:

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

Class : Class 6

## Ans 9:

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

Class : Class 5
Ok c is answer.

## Ans 11:

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.

Class : Class 8

## Ans 13:

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

Class : Class 7
hello

## Ans 15:

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

## Ans 16:

Class : Class 9
air can be compressed .

Class : Class 7
d

Class : Class 1
Ans 16 is wrong

Class : Class 7

Class : Class 6

## Ans 21:

Class : Class 8
Correct answer is C because air can be compressed. You don't need to add 400 and 50 because air can be compressed

Class : Class 7
Ans is c

## Ans 23:

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

Class : Class 6
the answer is d

## Ans 25:

Class : Class 8
yes all please understand sorry if i am wrong it compress the air dear children it wont increase t decreases

Class : Class 7
D

Class : Class 5
D

## Ans 28:

Class : Class 7
It was forced out of the tank so it went out and the thing is 50cmÃ‚Â³ so 400-50 50=400So the answer is 400cmÃ‚Â³

## Ans 29:

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 .......

## Ans 30:

Class : Class 8
you all are coreect

Class : Class 5
D

## Ans 32:

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

## Ans 33:

Class : Class 5
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

## Post Your Answer

Subject :NSO    Class : Class 5

Class : Class 5
B

## Ans 2:

Class : Class 9
DEFINITELY IT IS B

## Ans 3:

Class : Class 5
Both B and C are right so please donÃ¢Â€Â™t quarrel

## Ans 4:

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

Class : Class 4
I q

Class : Class 1

## Ans 7:

Class : Class 7
B is the correct answer.

## Ans 8:

Class : Class 9
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 9:

Class : Class 8
yes dear B and C are correct SOF is wrong my dear kids please dont fight

## Ans 10:

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

## Ans 11:

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 12:

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

## Ans 13:

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

## Ans 14:

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

## Post Your Answer

Subject :NSO    Class : Class 5

## Ans 1:

Class : Class 5
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!

## Post Your Answer

Subject :NSO    Class : Class 5

Class : Class 7

Class : Class 8

Class : Class 2

## Ans 4:

Class : Class 8
The answer is C because air and water can be compressed

Class : Class 5
c

Class : Class 2

## Ans 7:

Class : Class 5
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.

Class : Class 5

Class : Class 2

## Ans 10:

Class : Class 7
Ccccccccccccccccccccc ccccccccccccccccccccccccccccc

## Post Your Answer

Subject :NSO    Class : Class 6

## Post Your Answer

Subject :NSO    Class : Class 6

## Ans 1:

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 2:

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 3:

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

## Ans 6:

Class : Class 8
Answer is A NOT b

Class : Class 10

Class : Class 9

## Ans 9:

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

## Ans 10:

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 11:

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

## Ans 12:

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

## Ans 13:

Class : Class 9
the question must be wrong.

Class : Class 9
The answer is A

## Post Your Answer

Subject :NSO    Class : Class 6

Class : Class 8

Class : Class 8

Class : Class 8

Class : Class 9

Class : Class 8

Class : Class 8

Class : Class 8

Class : Class 9

Class : Class 8

Class : Class 10
A

## Ans 11:

Class : Class 8
I rock,i am the smartest and i say that A is correct

Class : Class 8

Class : Class 8

Class : Class 7

Class : Class 8

Class : Class 8

Class : Class 10
A is correct

Class : Class 7

Class : Class 10

## Post Your Answer

Subject :NSO    Class : Class 6

Class : Class 6

## Ans 2:

Class : Class 6
Verrrrrrry easyyyy.

## Post Your Answer

Subject :NSO    Class : Class 6