National Science Olympiad Forum By SOF Olympiad Trainer - Page 701
  1. Home
  2. /  Forum

User Forum

Ask Your Question
ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Dhruv from Springdales, Dubai
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 2:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
air can be compressed .

Ans 3:

Mannat Verma from Vivek High School , Chandigarh
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 4:

Prajjwal Dey from MLZS Wakad, PUNE
Class : Class 6

Ans 5:

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

Ans 6:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
ans is D

Ans 7:

Advaitt S Koduri from Presidium Noida 31, NOIDA
Class : Class 6

Ans 8:

Gauransh Singla from DPS , Navi Mumbai
Class : Class 5
the correct answer is c because the volume of the jar is 400cm3

Ans 9:

Niranjhan Rajeshkumar from Deens Academy, Whitefield, Bengaluru
Class : Class 8
Ans is c

Ans 10:

Keshav Taneja from Wisdom world school, Kurukshetra
Class : Class 5
I thought it would be C but after profound thinking I realised that the answer would be D

Ans 11:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
D

Ans 12:

Arnav Vashisth from GD GOENKA PUBLIC SCHOOL, Delhi
Class : Class 5
Ok c is answer.

Ans 13:

Tapan from San Academy, Chennai
Class : Class 8

Ans 14:

Advait kaushik from Ryan international school, Gurugram
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 15:

akshaj das from NARAYANA E TECHNO kaggdaspura, Bengaluru
Class : Class 8
you all are coreect

Ans 16:

XXX from SVM, Bangalore
Class : Class 5
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Ans 17:

Nilarka Pahari from Young Horizons School, Kolkata
Class : Class 4
d won't be the correct answer. the answer is c as air can be compressed.

Ans 18:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Ans 16 is wrong

Ans 19:

Mystic Girl from NPS, Bnagalore
Class : Class 6
C

Ans 20:

Satvik Agrawal from Delhi Public School, bhopal
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 21:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 22:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
Sof pls give us a GOOD explanation. Ans is d.

Ans 23:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
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 24:

Dibyajyoti Das from DAV PUBLIC SCHOOL, Bhubaneswar
Class : Class 5
D

Ans 25:

Tanishka Laha from Euroschool, Bengaluru
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 26:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7
d

Ans 27:

Shaina Mukherjee from DPS Sharjah, Dubai
Class : Class 5
D

Ans 28:

Tanmay kaushal from ICSE, Mumbai
Class : Class 5
Class : easy

Ans 29:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
the answer is d

Ans 30:

Hitanshi Behera from Loyola School , Bhubaneswar
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 31:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
air can be compressed and it would be 450 cm3 answer is d

Ans 32:

Hitarthi Shah from Ahmedabad International School, Ahmedabad
Class : Class 7

Ans 33:

Amey Goyal from Delhi Public School, PANCHKULA
Class : Class 7
hello

Post Your Answer

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Ruhaan Singh from Gopalan International School, Bangalore
Class : Class 6
B

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 3:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
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 4:

krishneil from Elpro international school, Pune
Class : Class 6
When Y is put it looks like it rose from 50 to 70.

Ans 5:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
x=20 and y= 25 read the last line of the question and you will find out

Ans 6:

Saipriya from Sankara, Chennai
Class : Class 8
yes dear B and C are correct SOF is wrong my dear kids please dont fight

Ans 7:

Bhavya Jain from K.R Manglam World School, Ghaziabad
Class : Class 8
B is 25ml which is less than 30 ml ... B is the answer

Ans 8:

Yajat Manoj from Vibgyor, Bengaluru
Class : Class 5
ANSWER is c as many people don't see that the container already had 30 ml of water

Ans 9:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
I q

Ans 10:

AARNA Kapse from The swaminarayan school, Nagpur
Class : Class 7
B is the correct answer.

Ans 11:

SHUBHANI LAKHERA from ANN MARY SCHOOL, Dehradun
Class : Class 5
Both B and C are right so please don’t quarrel

Ans 12:

shreyash rawat from podar international school, pune
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 13:

Akshaj V from PSBB Senior Secondary School, Chennai
Class : Class 6
When you put R on the surface you will find that it does not weigh more than 30 units.

Ans 14:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
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:

sauradeep from j v m Shyamali , ranchi
Class : Class 10
DEFINITELY IT IS B

Post Your Answer

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Rimi from TLISK, pune
Class : Class 9
I like this question

Ans 2:

Adwik Bairagi from DPS Newtown, KOLKATA
Class : Class 5
Well, The question is tricky and it needs critical thinking. I thought B but it was D........surprising!

Post Your Answer

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

shreyash rawat from podar international school, pune
Class : Class 8

Ans 2:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 3:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7

Ans 4:

ishaan from lvis, noida
Class : Class 5

Ans 5:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 6:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 7:

Pratham Dave from GNS, Bangalore
Class : Class 7
Ccccccccccccccccccccc ccccccccccccccccccccccccccccc

Ans 8:

Ybbn from Alphabet International School, Chennai
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 9:

Aarohi from Gear, Bengaluru
Class : Class 5

Ans 10:

TanulBhagwat from EIS, Pune
Class : Class 5

Ans 11:

Rasha Ranjan from DPS NOIDA , Noida
Class : Class 5
c

Ans 12:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is C because air and water can be compressed

Ans 13:

Rimi from TLISK, pune
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.

Post Your Answer

Sanjana Iyer from HFS Powai, Mumbai
Subject :NSO    Class : Class 6

Post Your Answer

Sanjana Iyer from HFS Powai, Mumbai
Subject :NSO    Class : Class 6

Ans 1:

Ashutosh Sundresh from Shiv nadar, Faridabad
Class : Class 10
ANSWER IS A, NOT B AS THE QUESTION SAYS TO CHOOSE THE CORRECT OPTION AND NOT INCORRECT OPTION.

Ans 2:

Vinayak Subramani from Euroschool , Mumbai
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:

Shriyann from Suniti Devi Singhania School, Thane
Class : Class 9

Ans 4:

Dipam from Podar International School, Aurangabad
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 5:

Saanvi from rvk, bengaluru
Class : Class 9
the question must be wrong.

Ans 6:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
Please stop these kind of mistakes. I have given many complaints.

Ans 7:

nimay gupta from Shiv Nadar School, noida
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 8:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
They are asking for the CORRECT answer so its A

Ans 9:

Akash Mukhoti from Hiranandani Foundation School, Powai , Mumbai
Class : Class 10
please correct the mistake as the question says that which is the correct option instead of incorrect.

Ans 10:

Ashher Pervez from DPS Bhilai, Bhilai
Class : Class 10

Ans 11:

Shayan Bari from Kendriya Vidyalaya, Katihar
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 12:

Ashher Pervez from DPS Bhilai, Bhilai
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 13:

SAGNIK CHAKRABORTY from DELHI PUBLIC SCHOOL , KOLKATA
Class : Class 9
The answer is A

Ans 14:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer is A NOT b

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 2:

Saanvi from rvk, bengaluru
Class : Class 9

Ans 3:

SHREYAN GUPTA from GARDEN HIGH SCHOOL, KOLKATA
Class : Class 9

Ans 4:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 5:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 6:

Ishitadas from Adamas World school , Ichapur
Class : Class 8

Ans 7:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 8:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9

Ans 9:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 10:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8

Ans 11:

Pragnay Priyadarshi from Quantum Leap School, HYDERABAD
Class : Class 7

Ans 12:

ADVAY BANSAL from LOTUS VALLEY INTERNATIONAL SCHOOL GURUGRAM, GURUGRAM
Class : Class 6

Ans 13:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 14:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 15:

Aarush from Podar, Mumbai
Class : Class 10

Ans 16:

Veda Dua from Delhi Public School, R. K. Puram, New Delhi
Class : Class 10
A

Ans 17:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8
I rock,i am the smartest and i say that A is correct

Ans 18:

Devasree from Presidium, Ghaziabad
Class : Class 10
A is correct

Ans 19:

Can I get Rank 35 darryl from Global Indian international school, Brawl stars
Class : Class 8

Ans 20:

Bhavya from ABC, Delhi
Class : Class 7

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

NILARKA PAHARI from Young Horizons School, KOLKATA
Class : Class 6

Ans 2:

NILARKA PAHARI from Young Horizons School, KOLKATA
Class : Class 6
Verrrrrrry easyyyy.

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

pradeep718 from DPS Internation, Singapore
Class : Class 2

Ans 2:

from ,
Class :
B....be coz both are plant derivatives....paper and cotton....

Post Your Answer

Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Post Your Answer