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Ankit Nandy from Lawrence High School, Bangalore
Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Alpha, Beta, Gamma in ascending order.

Alpha particles leaves the nucleus of an unstable atom at a speed of 16,000 kilometres per second, around a tenth the speed of light.
Beta particles travel at a speed of 270,000 kilometres per second, around 98% of speed of light.
Gamma particles travel at the speed of light.

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Agnimitra Gupta from south point school, Kolkata
Subject :NSO    Class : Class 4

Ans 1:

kadambari chaudhary from chinmaya vidayala, delhi
Class : Class 4
Options are wrong. Molecular distance should be less. first fix which column is X and Y.

Ans 2:

Vidhya M. from Vibgyor High Bannerghatta, Bangalore
Class : Class 4
When a substance is cooled the molecules come closer. But there is no picture showing that the molecules are coming closer there is no correct answer. Also option B and C are the same. Can you please change it?

Ans 3:

Ishit Rai from EUROSCHOOL THANE, THANE WEST
Class : Class 5

Ans 4:

monisha garg from carmel convent school sector 9 chandigarh, panchkula
Class : Class 4
all options are wrong

Ans 5:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 5
ALL ARE WRONG

Ans 6:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 5
all options are wrong

Ans 7:

Mahati p from cornerstone the public school, chandanagar, hyderabad
Class : Class 4

Ans 8:

Aparna praveen from Rajagiri, Ernakulam
Class : Class 4
is there a correction in the options given?if not please clarify with explanation

Ans 9:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
B and Co are same. Intermolecular space is not decreasing in any of the situations. It is wrong.

Ans 10:

Harish Divakar from Chennai public school global school, Chennai
Class : Class 4
All the answer is wrong. In the NSO book, it is right.

Ans 11:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 5
b and c are all the same

Ans 12:

ArhamAnay Jain 4G from MDPS, Faridabad
Class : Class 4
all options are wrong

Ans 13:

sundus from salwan public school, Gurgaon
Class : Class 4
All options are WRONG

Ans 14:

Chiranjib kar from MOUNT LITERA ZEE SCHOOL, JAJPUR
Class : Class 6
Options are wrong. Molecular distance should be less.

Ans 15:

from , Bengaluru
Class : Class 5
The options given are wrong / confusing. Please clarify.

Ans 16:

Me from bbps, New Delhi
Class : Class 5
if an object is cooled down the molecule structure changes from loosely packed to tightly packed. therefore none of the options is correct

Ans 17:

Harish Divakar from Chennai public school global school, Chennai
Class : Class 4

Ans 18:

Deepayan Das from South Point School, Kolkata
Class : Class 5
There is no specific details about which one is X or Y.So by common sense I think that it would be D.But B

Ans 19:

Ainesh das from Chrysalis, Bangalore
Class : Class 4
ansAll answers oposite

Ans 20:

Baibhab Tripathy from SAI INTERNATIONAL SCHOOL, BHUBANESWAR
Class : Class 6
I think al options are wrong . Please tell the correct answer

Ans 21:

Yaduveer Rathore from MSMS School, Jaipur
Class : Class 4
wrong wrong wrong wrong wrong wrong

Ans 22:

Angshu Ray from DPS East, Bangalore
Class : Class 4
it is wrong

Ans 23:

Samika Ranjan from The Shri Ram School Aravali, Gurgaon
Class : Class 7
please change the question.

Ans 24:

Ainesh das from Chrysalis, Bangalore
Class : Class 4
all are wrong

Ans 25:

Inakshi Dev from Hemsheela, Kolkatta, Kolkatta
Class : Class 4
Are B, C, D correct.

Ans 26:

Aarush Thakur from DPS, Gurgaon
Class : Class 6
option d maybe

Ans 27:

Prerona Chatterjee from Delhi Public School, Kolkata
Class : Class 5
The question is wrong... and so the answer is also misleading.

Ans 28:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
Option b, c are the same. Pls give me a proper explanation as to why one option is correct

Ans 29:

shreyash rawat from podar international school, pune
Class : Class 4
4wrong question

Ans 30:

Anirudh Bhattacharjee from THE LEXICON INTERNATIONAL SCHOOL KALYANI NAGAR PUNR, Pune
Class : Class 4

Ans 31:

Ishit Rai from EUROSCHOOL THANE, THANE WEST
Class : Class 5
Please please please please please please please please change the question

Ans 32:

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

Ans 33:

Bhavya Jain from K R Mangalam World Scholl, GHAZIABAD
Class : Class 4
how can liquid turn into gas by freezing ? Option A does the same thing so the correct option should be D

Ans 34:

Archit Borkar from Whitefield Global School, Bengaluru
Class : Class 4
wrong options

Ans 35:

Deepak Vijayaragavan from Greenwood High, Bengaluru
Class : Class 4
Please change it. It is correct in NSO book like Harish Divakar said

Ans 36:

Prashanth from Gems Modern Academy, Dubai
Class : Class 5
THE ANSWER IS WRONG.

Ans 37:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
None of the options are correct according to my doubt.

Ans 38:

vaibhav rai from pearson school jaipur, JAIPUR
Class : Class 5
I think all options are wrong

Ans 39:

Saumya Asmriti from CITY MONTESSORY SCHOOL INTER COLLEGE LUCKNOW UTTAR PRADESH, Lucknow
Class : Class 4
All options are wrong.

Ans 40:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 4
the options are wrong

Ans 41:

Prashanth from Gems Modern Academy, Dubai
Class : Class 5
SHOULD HAVE BEEN SPECIFIC WITH RESPECT TO X AND Y MARKING

Ans 42:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 5
PLS. CORRECT

Ans 43:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
I have by mistake typed it Co sorry it will be C. I have a solution we can report error.

Ans 44:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 5
question, answer and solution is wrongall the options are showing the difference on heating

Ans 45:

Abhinav Kulkarni from National Centre For Excellence, Bengaluru
Class : Class 4
all Q are wrong

Ans 46:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 5
I also think that.Questions ,options, colums and answers didn't mentioned.

Ans 47:

Arpit Pratap Singh from D P S bangalore north, Bengaluru
Class : Class 6
you are right vaibhav all are wrong

Ans 48:

BISWADITYA TRIPATHY from Delhi public school Bangalore east, Bangalore
Class : Class 4
Please explain the answer. I also support Baibhab that the choices given are wrong.

Ans 49:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
Qtn. agreed but main point is which is column X and which is column is Y??????

Ans 50:

Pratibha from Vaels billabong international, Chennai
Class : Class 5
Can somebody pls answer this question with explanation

Ans 51:

Arthaa Auti from Vidya valley school, pune
Class : Class 4
All are wrong. At least number of atoms should be same. So answer should be D

Ans 52:

Mahati p from cornerstone the public school, chandanagar, hyderabad
Class : Class 4
All the options are totally wrong, please change them

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Agnimitra Gupta from south point school, Kolkata
Subject :NSO    Class : Class 4

Achin conducted an experiment to find out the amount of light that can pass through three different materials, a clear plastic sheet, a cardboard and a piece of tracing paper. All the materials have the same thickness. He shone a torch on the three materials and used a light sensor to measure how much light has passed through each of them. Which of the following graphs most likely shows the amount of light that has passed through each material?

A
B
C
D


Ans 1:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
AAAAAAAAA IS RIGHT

Ans 2:

Baibhab Tripathy from SAI INTERNATIONAL SCHOOL, BHUBANESWAR
Class : Class 6

Ans 3:

Saani from Cambridge School, Mangalore
Class : Class 1
A is correct

Ans 4:

Baibhab Tripathy from SAI INTERNATIONAL SCHOOL, BHUBANESWAR
Class : Class 6
I think the ‘A’ is the right answer

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ANANYA.SINGH from dps, noida
Subject :NSO    Class : Class 2

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saesha from sulochanadevi singhania school, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

naman from PSBBM, Chennai
Class : Class 1
answer will be d 4 kilo meters

Ans 2:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
4 km

Ans 3:

Reeth Bhasin from Jamnabai Narsee International School, Mumbai
Class : Class 5

Ans 4:

SRIJITA MURMU from DPS Joka, Kolkata
Class : Class 5
4km

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Ved Parixit Brahmbhatt from Hillwoods School, Gandhinagar
Subject :NSO    Class : Class 9

Ans 1:

Shrestha Dutta from Julien Day School, KALYANI
Class : Class 10
force=change in momentum/time interval(del t) impulse=change in momentum=force * time interval(del t) SI unit of impulse is newton second or Ns. CGS unit of impulse is dyne second .

Ans 2:

Aarthi from Prince matriculation higher secondary school , Chennai
Class : Class 9
SI unit of impluse is Newton

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Sanjana Thampy from Ncfe, Bangalore
Subject :NSO    Class : Class 9

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Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 6

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Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 6

Ans 1:

Gauri Singh from St. John's School, Marhauli, Varanasi
Class : Class 5
I think option d is correct

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Katikela Aruna from Sri Chaitanya olympaid, Vijayawada
Subject :NSO    Class : Class 6

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