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Kshitij Gupta from St Kabir din, Ahmedabad
Subject :NSO    Class : Class 8

Ans 1:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 10
In reactivity series hydrogen is below zinc and is less reactive than zinc. As hydrogen below zinc therefore will reduce more and earlier than zinc , hence will go to cathode and zinc will reduced or deposit at anode. therefore P will be connected to R and Q to S.hence ans is :C

Ans 2:

Tanush from presidency east, Bangalore
Class : Class 5
And for this question must be A

Ans 3:

Riya Singhani from BVB vidhyashram, jaipur
Class : Class 8
WWWWRRRROOOONNNNNNNNNNGGGGGGGGGGGGGGGGG

Ans 4:

Chaitanya L K from SKCHEC, bangalore
Class : Class 8
Yes it is A

Ans 5:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9

Ans 6:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9
answer A

Ans 7:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
Answer is a

Ans 8:

Nishtha Neelabh from Lok Puram Public School, Thane West
Class : Class 6
answer should be A, as hydrogen is not released at cathode if the other cation is Zinc or below in the electrochemical series

Ans 9:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 10
thus answer is a

Ans 10:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
I will go mad with the number of wrong answers in this website.. answer should be a. For example when a spoon has to be electroplated with copper, copper is ALWAYS ON ANODE and the spoon is ALWAYS ON CATHODE. Why different logic is used here?

Ans 11:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 10

Ans 12:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 10
my apologies for the previous explanation answer is : C

Ans 13:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
it should be a

Ans 14:

Anshuman D from MVM, Hyderabad
Class : Class 9
Yes the answer is A

Ans 15:

Sounak halder from Kendriya Vidyalaya Cossipore, kolkata
Class : Class 8
the answer will be 'A'

Ans 16:

Bipasana from KV IIT Kanpur, Kanpur
Class : Class 9
It has to be A.

Ans 17:

Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Class : Class 8
A

Ans 18:

from Bhandari Public School, KHANDWA
Class : Class 9
The correct answer is AAAAAAA

Ans 19:

Amrit Biswas from INDUSVALLEY PUBLIC SCHOOL, Noida
Class : Class 10
What is the correct answer A or C ???????

Ans 20:

Dhars from DPS EAST Bangalore , Bengaluru
Class : Class 10
the answer is wrong.....it should be a

Ans 21:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
answer is a

Ans 22:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
i do feel that correct answer is A.as P has to be electroplated ,it must be on cathode(-ve).so,correct is =A

Ans 23:

Akshara from NPS, Bengaluru
Class : Class 8
Yes it should be A .

Ans 24:

tamojit das from techno India Group Public School , Chinsura
Class : Class 8
cation(Zn2 ) must be deposited to the cathode.

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H KRITHIK from kendriya vidyalaya, chennai
Subject :NSO    Class : Class 3

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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:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10
c

Ans 2:

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 3:

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 4:

Gauri Singh from St. John's School, Marhauli, Varanasi
Class : Class 10
Yes, but in the given figure it is sedimentation

Ans 5:

A Andrew from Lalaji Memorial Omega International School, Chennai
Class : Class 5
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.

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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

Ans 1:

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

Ans 2:

Divij Narang from ,
Class : Class 9

Ans 3:

arnav from the gurukul, Panchkula
Class : Class 5

Ans 4:

Student from School, City
Class : Class 8

Ans 5:

stavya from dps noida, noida
Class : Class 8
the soultion is wrong beacuse the literal defination of spontaneous combustion tells us that it happens at room temprature without application of heat by external source

Ans 6:

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.

Ans 7:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Actually, the solution is opposite to the correct answer

Ans 8:

Soham from Vibgyor high, Pune
Class : Class 8

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

Ans 1:

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

Ans 2:

SIDDHI SHREYASH from Phoenix Green International School , Hyderabad
Class : Class 9

Ans 3:

Sahasra Shanker from KV IIT, Chennai
Class : Class 6
yeah right Triguna!!! in both cases soybean is present? why so?

Ans 4:

Aadavamoorthy from Advaith International Academy, Hosur
Class : Class 9

Ans 5:

Aadavamoorthy from Advaith International Academy, Hosur
Class : Class 9
Both Wheat and Maize require rotation of crops.

Ans 6:

Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Class : Class 8

Ans 7:

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

Ans 8:

MandarPalkar from KV DRDO, Bangalore
Class : Class 8
The protein requirement of mustard is fulfilled by the ribozome present in root nodules of soyabean?

Ans 9:

Sumedha Mishra from xyz, School, Pune
Class : Class 8

Ans 10:

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

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

Ans 1:

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

Ans 2:

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 3:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9

Ans 4:

Souvik Bhattacharya from MVM, Hyderabad
Class : Class 10
I got the question with the options in my laptop. For those who did not get the options : it is the website's fault

Ans 5:

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

Ans 6:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
iT IS NOT LAPTOP'S MISTAKE IT IS THE WEBSITE'S MISTAKE ITSELF.

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
They did not give options so that is why it went wrong. these kind of incidents happen very frequently in SOF

Ans 12:

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

Ans 13:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
they didnt give the options

Ans 14:

Arnav Raj Sharma from Dpsvk, Gurgaon
Class : Class 9
my laptop din't provide the options

Ans 15:

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

Ans 16:

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 17:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
NO OPYIONS!

Ans 18:

khushi Joshi from Svkm , Mumbai
Class : Class 10
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:

Aniket Ghosh from DAV Public School Haldia, Haldia
Class : Class 9

Ans 20:

Anmol kathar from deogiri global academy, aurangabad
Class : Class 10
they didn't given on question page so all my friends and I missed that question

Ans 21:

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

Ans 22:

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

Ans 23:

Ankush Ghosh from DPS, Doha
Class : Class 10
no options

Ans 24:

Bharat from Geetanjali Olympiad school, Bangalore
Class : Class 9
they did not give options

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

Ans 1:

Madhura Mageshwaran from zurich school, zurich
Class : Class 6
This is actually multiple Answer Q.It is silly!!!

Ans 2:

Vibha from Birla Public School, Doha
Class : Class 7
THE CORRECT ANSWER IS D BECAUSE THEY NEED TO OVERCOME DEFICIENCY OF NITROGEN

Ans 3:

Daksh Chanani from Sri Sri academy, Kolkata
Class : Class 8
c

Ans 4:

Chinmay S Amboori from Adani Public School, Mundra
Class : Class 7
Answer should be C and D.

Ans 5:

arsh from nps, bangalore
Class : Class 4

Ans 6:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
C

Ans 7:

Vrishank Sai Anand from GEMS Modern Academy, Dubai
Class : Class 9
the correct answer should be C

Ans 8:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
ACTUALLY I DISAGREE WTH my PAST SELF SAYING c IT IS d

Ans 9:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 10
B,Care correct as they can not do photosynthesis , uses his leaves to catch food

Ans 10:

Brinda Modi from Orchids International School, Pune
Class : Class 6
Yes, it is a multiple answer question.

Ans 11:

Suniti Kumar Ghosh from Holy Angels' School, Katwa
Class : Class 8
Correct answer is, C

Ans 12:

RAGHAV VARSHNEY from CITY MONTESSORI SCHOOL GOMTINAGAR LUCKNOW, Lucknow
Class : Class 7
c and d are both the answers i think

Ans 13:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10
correct ans is C

Ans 14:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 5
D is correct

Ans 15:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 10
I think Dalso

Ans 16:

Arnesh from DPS Mathura Road , New Delhi
Class : Class 7

Ans 17:

Rishi from Deens Academy, BENGALURU
Class : Class 9
B C D is the answers

Ans 18:

Shreyansh Saha from Dps Megacity, Kolkata
Class : Class 6
Option D

Ans 19:

Dheer Pandey from Sentia The Global School, Hyderabad
Class : Class 10
d

Ans 20:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8

Ans 21:

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

Ans 22:

Manan thorat from Podar powai, Mumbai
Class : Class 4
Its just sooo Confusing Tel the logi I dont understand!!

Ans 23:

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

Ans 24:

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

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