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param ahuja from m.p.s, Ajmer
Subject :NSO    Class : Class 7

Ans 1:

Anshuman D from MVM, Hyderabad
Class : Class 9
I am not able to understand it

Ans 2:

NIKHIL RANJAN from Litera Valley School, PATNA
Class : Class 7
The correct is C

Ans 3:

Ridhima Sahu from Bal Bharati Public School , Navi Mumbai
Class : Class 7
Answer is (a). This is observed due to this reasonThere's a line which is making an angle 55° and is a linear pair. Hence the angle of line (mirror) p is 180°. But 55° is not the angle of incidence. To get the sum of angle of incidence and reflection, we multiply 55° by 2 and get 70°. Since angle of incidence =angle of reflection, 70°÷2=35°. The angle of incident ray and the reflected ray of P and Q are same thus the sum of the angle of incidence and angle of reflection would be the same (70°). We know, angle of incidence=angle of reflection, hence 70°÷2=35°. Or A=35°

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 5:

NIKHIL RANJAN from Litera Valley School, PATNA
Class : Class 7
Here the properties of lines and angles will be applied.Then the laws of reflection

Ans 6:

Anshuman D from MVM, Hyderabad
Class : Class 9
I actually don't get the logic behind it

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param ahuja from m.p.s, Ajmer
Subject :NSO    Class : Class 7

Ans 1:

Sanjay Kumar from Vellammal Vidyashram, Chennai
Class : Class 5
Ans c

Ans 2:

Tanush Rao from Delhi Public School Vasant Kunj, Delhi
Class : Class 8

Ans 3:

NIKHIL RANJAN from Litera Valley School, PATNA
Class : Class 7
0hi hi hih h hi hi hi hii

Ans 4:

siddarth from DPS Ecity, Bengaluru
Class : Class 8
ans= c

Ans 5:

Jai kumar Bohara from Dps, Udaipur
Class : Class 9
yes ans c

Ans 6:

Om Goel from Ryan International School, New Delhi
Class : Class 10
the answer should be B because cocave lens is a diverging lens which will diverge the light to all parts of the room

Ans 7:

Md.ZEESHAN ali from St. Agness branch school, Kharagpur
Class : Class 4
yes according to me also the answer is c but in nso practice papers it is written as d

Ans 8:

Arvin from KC INTERNATIONAL SCHOOL JAMMU, Jammu
Class : Class 7
The answer is B

Ans 9:

NIKHIL RANJAN from Litera Valley School, PATNA
Class : Class 7
The correct answer is D.

Ans 10:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9

Ans 11:

Miheet parikh from Jamnabai narsee school, Mumbai
Class : Class 3
A

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priyanshi gupta from opg world school , delhi
Subject :NSO    Class : Class 4

Ans 1:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 2:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
I think B and D is correct.

Ans 3:

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

Ans 4:

PARTH PANCHAL from NEW HORIZON SCHOLARS SCHOOL, THANE
Class : Class 7
yes you are right

Ans 5:

Jithisha Barapati from Dimensions, Hyderabad
Class : Class 4
D is correct

Ans 6:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
the answer is d

Ans 7:

LAVANYA DADHWAL from BLOOM PUBLIC SCHOOL, South West Delhi
Class : Class 9
D is correct

Ans 8:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 5
NONE of these is the correct answer

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SHAURYA RAJ from LITERA VALLEY SCHOOL, PATNA
Subject :NSO    Class : Class 3

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ADVAITH KRISHNAN from SHISHUKUNJ INTERNATIONAL SCHOOL, INDORE
Subject :NSO    Class : Class 7

Ans 1:

Deeksha Mittal from JAYPEE PUBLIC SCHOOL, NOIDA, NOIDA
Class : Class 6
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 2:

Aryan Keswani from Delhi Public School, Mathura Road, New Delhi
Class : Class 10
Hcl doesen't react with metals......Sulphuric acid does

Ans 3:

Antareep Mukherjee from New Horizon Public School, Bangalore
Class : Class 8

Ans 4:

Akshay Jha from DPS NERUL, Navi Mumbai
Class : Class 7
Yes, I also agree. HCl is a strong acid and reacts with metals almost exactly like H2S04, it is also stored in glass for this reason, question is wrong.

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Hydrocloric acid is very corrosive and reacts with metals . So HCL is stored in glass bottles because it dont causes damage to it . ..........SO 3 statement should be true and their explanation is wrong .

Ans 6:

Aarnavi Mann from Scholars rosary Sr. Sec. School, Rohtak
Class : Class 8
Inorganic acids such as minerals acid like HCL , H2SO4 etc . Are. Not always made in factories . HCL is produced in our stomach.

Ans 7:

Chaitanya L K from SKCHEC, bangalore
Class : Class 8
hcl reacts with metals too

Ans 8:

Ankush Ghosh from DPS, Doha
Class : Class 10
Hcl doesnt react with glass. The explanation is wrong

Ans 9:

dhairya mittal from vidyashram international school jodhpur, Jodhpur
Class : Class 5
You all are correct

Ans 10:

Tejas Agarwal from Amity International School , Noida
Class : Class 7
Q is wrong since option 1 is false, rest all are true

Ans 11:

Avaneesh Sai Vemparala from The knowledge habitat, Pune
Class : Class 3
Hcl reacts with metals also

Ans 12:

Anu Elizabeth Alexander from Sishya, Chennai
Class : Class 8

Ans 13:

Ahan Biswas from National Public School, Bangalore
Class : Class 8
Hydrochloric acid reacts with metals and corrodes them and is therefore stored in glass bottles... This question is wrong and so is the explanation.

Ans 14:

Akshara from NPS, Bengaluru
Class : Class 8
I completely agree... The HCl reacts with metals , which is major reason of why HCl is stored in glass bottles..

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Anhiti Mandal from Shri Ram School, Gurgaon
Subject :NSO    Class : Class 7

Ans 1:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
i gave the correct answer but in the result they are showing that it is wrong.it is the same case with some other questions too.Please make a note that you correct it,thank you.

Ans 2:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7

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A Ramakrishna Rao from D A V Public School. Unit 8. Bhubaneswar , Bhubaneswar
Subject :NSO    Class : Class 5

Ans 1:

SARVESH RAMESH from DPS MIS, QATAR
Class : Class 10

Ans 2:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
yes because the stapler is a third class lever

Ans 3:

D Murari from Indian School of Excellence, Bangalore
Class : Class 9

Ans 4:

Risha Jakhotiya from Indo Scott Global School, Pune
Class : Class 4
D

Ans 5:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
Stapler ( option D ) is the odd one out as it is a third class lever i.e. effort is between the load and fulcrum .

Ans 6:

Advik Wakchoure from The Shriram Universal School, Dombivli
Class : Class 5
Yes option d is correct

Ans 7:

Kavin Karthick M from DPS bangalore east, Bengaluru
Class : Class 6
option D is correct because stapler is 3rd class lever

Ans 8:

Shruthi from VIBGYOR, Mumbai
Class : Class 6
What is type of Option A?

Ans 9:

Rohan David from Oakridge International school, Hyderabad
Class : Class 7
The answer is D because the stapler is the odd one out

Ans 10:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5

Ans 11:

siri from Vibgyor, Bangalore
Class : Class 8
according to Google stapler is a third-class lever

Ans 12:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

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Sarthak yadav from RPS, Mahendragarh
Subject :NSO    Class : Class 4

Ans 1:

shibin joseph from ,
Class : Class 3

Ans 2:

Adnan from Nilgiri hills public school , Noida
Class : Class 5
I was thinking about body building food

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M.MEYYAPPAN from DPS, Bhilai
Subject :NSO    Class : Class 8

Ans 1:

kd from st Jude's academy , sonipay
Class : Class 8
A

Ans 2:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
A

Ans 3:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 4:

SpaceXX from indian school sohar, Muscat
Class : Class 9
The correct answer is B because manure is soluble in water but it is absorbed very slowly

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Ans 6:

Arnav Diwan from F.A.I.P.S Kuwait, Kuwait
Class : Class 10
it is A as fertilizers are soluble in water. You might have heard that fertilizers flow into the river and cause eutrophication it flows into river because it is soluble in water

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jeeva from Kendriya Vidyalaya Kottayam, Kottayam
Subject :NSO    Class : Class 8

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