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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
ans is c

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Sriyansh from Surabhi , Hosapete
Class : Class 9
Plug key is also a type of switch.

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Raghav Mittal from DAV Public School, ludhiana
Subject :NSO    Class : Class 5

Ans 1:

Gauri Singh from St. John's School, Marhauli, Varanasi
Class : Class 8
Yes, but in the given figure it is sedimentation

Ans 2:

Shivangi from St. Michael's High School, Patna
Class : Class 5
Ya, filtration can also remove insoluble impurities but in this case sedimentation and decanation is more appropriate answer.

Ans 3:

Mallika Gupta from NPS indiranagar, Bangalore
Class : Class 9
it needs to be sedimentation and decantation because the insoluble material present in the liquid is quite heavy you only perform filtration when the particles float over the surface of the water

Ans 4:

A Andriya from Lalaji Memorial Omega International School, Chennai
Class : Class 8
sedimentation and decantation is the answer . but filtration can not come because we can see in the picture itself that the particles are big ,that's why sedimentation and decantation . if the particles are small but yet insoluble , then only it is filtration . I hope that you understood.

Ans 5:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 8
c

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

RAHUL S ROY from ST.XAVIERS HIGH SCHOOL,VAPI, VAPI,GUJARAT
Class : Class 7
correct option is c

Ans 2:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
every single sound has its own secondary waves, so the correct option must be option C.

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Ethel shiju from National Public School Indiranagar, Bangalore
Subject :NSO    Class : Class 8

Read the given statements and select the correct option.
Statement 1 : Phosphorus burns in air at room temperature.
Statement 2 : It is an example of spontaneous combustion.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.


I say it is option a but they say it is b....But isn’t this definitely due to spontaneous combustion?

Ans 1:

Yash Bindal from Global Indian International School, Singapore
Class : Class 9

Ans 2:

Student from School, City
Class : Class 8

Ans 3:

arnav from the gurukul, Panchkula
Class : Class 4

Ans 4:

Bhuvanesh Singla from SCTS, Bengaluru
Class : Class 8
Hi, the statement 2 is true but just tells about the type type combustion to which the reaction given in statement belong. it does not tell about actual cause of burning of phosphorus in air at room temperature. the reason for statement 1 is that phosphorus is a highly reactive element that's why burns in air at room temperature.

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Ethel shiju from National Public School Indiranagar, Bangalore
Subject :NSO    Class : Class 8

Ans 1:

S V Harini from Vailankanni public school , Krishnagiri
Class : Class 8
Think in the way of leguminous crops

Ans 2:

Triguna from Kendriya Vidyalaya No.1 Salt Lake, Kolkata
Class : Class 8
Why so? In both the cases soybean is present.

Ans 3:

Pradanya from KV IIT, Chennai
Class : Class 3
yeah right Triguna!!! in both cases soybean is present? why so?

Ans 4:

Anshuman D from MVM, Hyderabad
Class : Class 9
Supposed to be only ABecause mustard is a non leguminous plantEven it can be rotated with soyabean

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Anurag Basistha from Prudence School Dwarka 16 B, Delhi
Subject :NSO    Class : Class 6

Ans 1:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 6
they didnt give the options

Ans 2:

Raghav from Shalom Hills International school, Gurgaon
Class : Class 6
They're not even giving me options

Ans 3:

Ayush Anand Sharma from GEMS international school , Gurgaon
Class : Class 8
my laptop din't provide the options

Ans 4:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
They didn't give options

Ans 5:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 8
NO OPYIONS!

Ans 6:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 6

Ans 7:

Ritika Bakshi from Techno India Group public School Hooghly, Chinsurah
Class : Class 7
Want option!

Ans 8:

Naman from Svm, Nalasopara
Class : Class 6
options are missing

Ans 9:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
they should be more careful

Ans 10:

Riddhi from St Ursula high school, PIMPRI CHINCHWAD
Class : Class 6
No options

Ans 11:

Pulkit Krishna from St. Paul's High School, Hajipur
Class : Class 6
The shadow will be whole black as the book is an opaque object and will not allow any light to pass through it so on the screen it will form a shadow. And the rest that is the ring, no light will reach it thus how can its shadow be formed?

Ans 12:

Ishaan Mishra from Sai International School, Bhubaneswar
Class : Class 7
I typed in c. What is this?

Ans 13:

Bharat from Geetanjali Olympiad school, Bangalore
Class : Class 7
they did not give options

Ans 14:

Aniket Ghosh from DAV Public School Haldia, Haldia
Class : Class 8

Ans 15:

Anmol kathar from deogiri global academy, aurangabad
Class : Class 9
they didn't given on question page so all my friends and I missed that question

Ans 16:

Ankush Ghosh from DPS, Doha
Class : Class 8
no options

Ans 17:

Kshitij from Sams, Bangalore
Class : Class 6
they MUST and SHOULD be more CAREFUL. No options??? Then, how should we answer their question??? they take no actions! look:-a person has commented a year ago but?NO RESPONSE

Ans 18:

khushi Joshi from Svkm , Mumbai
Class : Class 9
They did not give the options on my iPad so I couldn't see which was the correct ans. something needs to be done about this problem.

Ans 19:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
They did not provide options on my laptop but option C is correct.

Ans 20:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
They did not give options on my ipad .

Ans 21:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 8
They did not give options so that is why it went wrong. these kind of incidents happen very frequently in SOF

Ans 22:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 8
iT IS NOT LAPTOP'S MISTAKE IT IS THE WEBSITE'S MISTAKE ITSELF.

Ans 23:

Ahaan Pathak from Treamis World School, Bangalore
Class : Class 8
they didn't give the options to my computer

Ans 24:

Sudarshana Bhattacharya from Maharishi vidya mandir, Hyderabad
Class : Class 7
I got the question with the options in my laptop. For those who did not get the options : it is the website's fault

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Anshu Manglik from Delhi Public School, Gurgaon
Subject :NSO    Class : Class 4

Ans 1:

Sankeerth Sunil from Shishya BELM public School, Bangalore
Class : Class 6
correct ans is C

Ans 2:

DHEER PANDEY from Sentia School, Hyderabad
Class : Class 7
d

Ans 3:

Saiesh from Sindhi high school, Bangalore
Class : Class 4
Correct answer is C

Ans 4:

arsh from nps, bangalore
Class : Class 4

Ans 5:

Vibha from Birla Public School, Doha
Class : Class 4
THE CORRECT ANSWER IS D BECAUSE THEY NEED TO OVERCOME DEFICIENCY OF NITROGEN

Ans 6:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 4
D is correct

Ans 7:

RAYANSH MISHRA from VIBGYOR HIGH, Pune
Class : Class 4
B,Care correct as they can not do photosynthesis , uses his leaves to catch food

Ans 8:

Suniti Kumar Ghosh from Saraswati Devi Public School , Salar
Class : Class 4
Correct answer is, C

Ans 9:

Pankaj Rajput from RBK GLOBAL SCHOOL, THANE
Class : Class 4
c

Ans 10:

RAYANSH MISHRA from VIBGYOR HIGH, Pune
Class : Class 4
I think Dalso

Ans 11:

Arnesh from DPS Mathura Road , New Delhi
Class : Class 4

Ans 12:

Agriye Kamboj from ST.XAVIER SEC SE CO ed Bhopal, BHOPAL
Class : Class 5
Correct answer is D.Because insectivores plants can photosynthesise.

Ans 13:

Rishi from Deens Academy, BENGALURU
Class : Class 4
B C D is the answers

Ans 14:

Vrishank Sai Anand from GEMS Modern Academy, Dubai
Class : Class 2
the correct answer should be C

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from Queen of angel, bharuch
Subject :NSO    Class : Class 3

Ans 1:

Shreya from RCIS , MY SORE
Class : Class 3
U

Ans 2:

Shreya from RCIS , MY SORE
Class : Class 3
U

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Bhabani Prasad from Narayan School, Kolkata
Subject :NSO    Class : Class 5

One afternoon Ravi and Mohit were playing in park.All of a sudden, Ravi felt uneasy and started to bleed through nose. What should Mohit do immediately to handle the situation?

AHe should blow some warm air on a handkerchief and put it over Ravi’s mouth.
BHe should make Ravi sit on a bench or chair with his head held back.
CHe should block Ravi’s nose with a piece of cloth to stop the bleeding.
DHe should apply some antiseptic within Ravi’s nose using some cotton.

Ans 1:

Ishir Jha from Keshav Saraswati Vidya Mandir, Patna
Class : Class 7

Ans 2:

likith from Delhi Public School International School, Singapore
Class : Class 7
Option C is correct

Ans 3:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
Answer B is right because if you refer to the 4th grade book, the first point written is to tilt your your head back

Ans 4:

A Andriya from Lalaji Memorial Omega International School, Chennai
Class : Class 8
yes. Gauri Singh is right . option c is right .

Ans 5:

Gauri Singh from St. John's School, Marhauli, Varanasi
Class : Class 8
Option C is right

Ans 6:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 6
i agree with Gauri Singh and Kashvi Sharma

Ans 7:

Jasmine Kaur from Venkateshwar International School , New Delhi
Class : Class 5
On page 75 of "Learning Science for Smarter Life" for class V it is mentioned that person should sit down and lean forward. It also says to pinch the nose.All answer choices of this question are therefore incorrect.

Ans 8:

Siddhanth Subramanian from Global Indian International School , Singapore
Class : Class 7
option c is correct

Ans 9:

Kashvi Sharma from Jankidevi Public School , Dausa
Class : Class 8
Yes,In the book it is said that the patient should be made sit and lean forward not backward and patient should be told to pinch the sides of the nose together. So the answer should be C.

Ans 10:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
option c is correct

Ans 11:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
option b is correct because by sitting with his head facing up wards would take the blood flow downside

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