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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

Ans 2:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
both answers b and c are not advisable

Ans 3:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

Ans 4:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Vallabh Agrawalla from Sai International School, Bhubaneswar
Class : Class 8
After unscrambling the four jumbled words. We get, Sedimentation, Chlorination, Distillation and Filtration. Filtration and Sedimentation are methods of removing insoluble impurities. Distillation is the only option that is used to remove soluble impurities.

Ans 2:

PARUL GHARSE from Vibgyor, Mumbai
Class : Class 6

Ans 3:

Devina kashyap from TPS, Mumbai
Class : Class 4

Ans 4:

Devina kashyap from TPS, Mumbai
Class : Class 4

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shreyash rawat from podar international school, pune
Subject :NSO    Class : Class 4

Ans 1:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
option B

Ans 2:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 7
The pattern followed is 6 7=137 9=16So,8 4=12

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 7
i.e. 6 plus 7 = 13 and 9 plus 7 = 16 . SO, 8 plus 4 is 12.

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Diti Sharma from Amity International School, Noida
Subject :NSO    Class : Class 8

Air pollutants are harmful to living things. Which of the following is/are their harmful effect(s)?
(i) They form acid rain.
(ii) They cause breathing problems in humans.
(iii) They interfere with photosynthesis in plants.
(iv) They result in the depletion of ozone layer.

A (i) only
B (i) and (ii) only
C (i), (ii) and (iii) only
D (i), (ii), (iii) and (iv)


It is because acid rain is caused by sulphur dioxide and nitrogen dioxide. Breathing problems are caused by various kinds of pollutants. Dust particles interfere with photosynthesis in plants. Chloro-fluoro carbons or CFCs result in the depletion of ozone layer.

Ans 1:

Pratyay Anand from Ryan International School, NAVI MUMBAI
Class : Class 9
i dont understand how ?

Ans 2:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
Please explain

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Drashti from Global Indian International School, Noida
Subject :NSO    Class : Class 7

Ans 1:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
option b

Ans 2:

Ayansh Verma from Whitefield Global School, Bangalore
Class : Class 7

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ANURADHA NAIR from SANDEEPANI VIDYA NIKETHAN SCHOOL, Thrissur
Subject :NSO    Class : Class 4

Ans 1:

ANURADHA NAIR from SANDEEPANI VIDYA NIKETHAN SCHOOL, Thrissur
Class : Class 9
A IS THE ANSWER

Ans 2:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
option A

Ans 3:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
answer is a because when the ice melts it becomes warmer and changes into liqiud

Ans 4:

sauradeep from j v m Shyamali , ranchi
Class : Class 9
C

Ans 5:

Payal Porwal from St John gola, Gola
Class : Class 6
C

Ans 6:

Overtaker from Blore, Blore
Class : Class 4
A

Ans 7:

Overtaker from Blore, Blore
Class : Class 4
A

Ans 8:

Payal Porwal from St John gola, Gola
Class : Class 6
C

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
A

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The correct answer is A

Ans 3:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 7
The correct answer is A only.

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MAHESH PRASAD MC from Silveroaks, Hyderabad
Subject :NSO    Class : Class 8

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tamojit das from techno India Group Public School , Chinsura
Subject :NSO    Class : Class 8

Ans 1:

Arnav Ranka from Gyan Bharati School, Saket, New Delhi
Class : Class 9

Ans 2:

Student from School, City
Class : Class 5
The *solution* and the *option* mismatch.

Ans 3:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9

Ans 4:

Pranav from JSS Public School, Bengaluru
Class : Class 10
The answer is Option A

Ans 5:

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

Ans 6:

S V Harini from Vailankanni public school , Krishnagiri
Class : Class 8

Ans 7:

Ayush Gorain from Sarala Birla Public School, Ranchi
Class : Class 8
According to Faraday's right hand rule, electricity flowing from point A to B generates a magnetic field around the wire moving from right to left (above the wire), and left to right (below the wire). Due to the compass being above the wire (according to the question), the compass needle must be influenced by the magnetic field, such that it points towards the right; i.e. the needle points in a direction from left to right. Thus, I opine that option (A) is the correct answer, not option (D). As there is an electric current, there must be a magnetic field, and thus there must be a deflection in the compass, which excludes option (D) entirely.

Ans 8:

Dhanya Krishnaji from ISG, Muscat
Class : Class 8
It’s A . The question uses Maxwell’s right thumb rule.

Ans 9:

Nilanjana De from Delhi Public School North, Bengaluru
Class : Class 8
The solution says that the answer is supposed to be d but according to the explanation given the answer seems to be a. Please explain.

Ans 10:

Karthik Rao Varam from Bala Vidya Mandir, Chennai
Class : Class 10

Ans 11:

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

Ans 12:

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

Ans 13:

Hprakash09 from Billabong high Bhopal, Bhopal
Class : Class 7
I'm not sure what the answer is in this one, as the correct answer and the solution are mismatched.

Ans 14:

Gaurish Singla from DPS School Sector 19, Faridabad
Class : Class 8

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Antara Mazumdar from Navy Children School, Mumbai
Subject :NSO    Class : Class 7

Ans 1:

rachith from null, null
Class : Class 7
this q didnt come

Ans 2:

Spandan Pradeep Pathare from Takshila school , Ahmednagar
Class : Class 8
Answer is option a as decomposition of dead matter of plant and animal by animals which gives nutrients to plants

Ans 3:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 6
this question did not come in the question paper,when i was solving

Ans 4:

Jai kumar Bohara from Dps, Udaipur
Class : Class 9
this question did not come in the question paper,when i was solving

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