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

The diagram shows a beaker containing a solution of zinc sulphate and two carbon electrodes. A battery is placed next to it. In order that the electrode P be plated with zinc,


A P must be connected to S and Q to R
B P must be connected to Q and S to R
C P must be connected to R and Q to S
D P and Q must be connected to R.


The answer would be a as znso4 wold breakdown into zn 2and so42-ions .the zn 2 would be attracted towards cathode(negative terminal) so p would be attached to negative terminal and therefore the answer is a.

Ans 1:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 8

Ans 2:

Tanush from Presidency, Bangalore
Class : Class 3
And for this question must be A

Ans 3:

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

Ans 4:

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

Ans 5:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 9
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 6:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 9
thus answer is a

Ans 7:

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

Ans 8:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 8
answer A

Ans 9:

Dhars from DPS EAST Bangalore , Bengaluru
Class : Class 9
the answer is wrong.....it should be a

Ans 10:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 9
my apologies for the previous explanation answer is : C

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

A note is shown here which Ravi has made about different types of house. Unfortunately when he had finished writing, some ink spilt over the page and covered some of the key words.
A wooden house made on a boat is called . It is common in Kashmir and . In areas with heavy rainfall houses are common. are built of snow and are found in very cold countries.
Select the correct sequence of hidden words to complete the note.

A Caravan, Rajasthan, Tent, Igloos
B Houseboat, Kerala, Stilt, Igloos
C Houseboat, Delhi, Kutcha, Igloos
D Tent, Karnataka, Caravan, Igloos

Ans 1:

Varsha from Nps banashankari Bangalore, Bangalore
Class : Class 3
B

Ans 2:

Dishen dharmenra patel from Anand niketan to the satellite , Ahmedabad
Class : Class 3

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 7
ans is c

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Sriyansh from Surabhi , Hosapete
Class : Class 8
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 5
Yes, but in the given figure it is sedimentation

Ans 2:

Mallika Gupta from NPS Koramangala, Bangalore
Class : Class 7
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:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 7
c

Ans 5:

A Andriya from Lalaji Memorial Omega International School, Chennai
Class : Class 7
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 7
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:

arnav from the gurukul, Panchkula
Class : Class 8

Ans 2:

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

Ans 3:

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.

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

Ans 1:

Ritika Bakshi from Techno India Group public School Hooghly, Chinsurah
Class : Class 6
Want option!

Ans 2:

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

Ans 3:

Ayush sharma from GEMS international school , Gurgaon
Class : Class 7
my laptop din't provide the options

Ans 4:

Anmol kathar from deogiri global academy, aurangabad
Class : Class 7
they didn't given on question page so all my friends and I missed that question

Ans 5:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 6
NO OPYIONS!

Ans 6:

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 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

Ahaan Pathak from Treamis World School, Bangalore
Class : Class 7
they didn't give the options to my computer

Ans 13:

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 14:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 6
iT IS NOT LAPTOP'S MISTAKE IT IS THE WEBSITE'S MISTAKE ITSELF.

Ans 15:

Aniket Ghosh from DAV Public School Haldia, Haldia
Class : Class 7

Ans 16:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 6
They did not give options so that is why it went wrong. these kind of incidents happen very frequently in SOF

Ans 17:

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

Ans 18:

khushi Joshi from Svkm , Mumbai
Class : Class 8
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:

Ankush Ghosh from DPS, Doha
Class : Class 7
no options

Ans 20:

Bharat from Geetanjali Olympiad school, Bangalore
Class : Class 6
they did not give options

Ans 21:

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

Ans 22:

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

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

Ans 1:

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

Ans 2:

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

Ans 3:

DHEER PANDEY from CORNERSTONE SCHOOL, Hyderabad
Class : Class 6
d

Ans 4:

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

Ans 5:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 5
correct ans is C

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