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Sriram from DPS Modern Indian school , Doha
Subject :NSO    Class : Class 8

Different methods of extinguishing a fire involve the following :
I. Removing the combustible substance.
II. Cooling the substance to a temperature below its ignition temperature.
III. Cutting off the supply of air.
Which of the following statements is correct?

A Method I is suitable in case of a building on fire.
B Method II involves water which works when wood or paper are on fire.
C Method III involves carbon dioxide gas which is lighter than oxygen and forms a blanket around the air.
D All of these


whats wrong with B

Ans 1: (Master Answer)

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

Ans 2:

arnav from the gurukul, Panchkula
Class : Class 8

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NISHIT.JHA from DPS Noida, Noida
Subject :NSO    Class : Class 4

Ans 1:

sauradeep from j v m Shyamali , ranchi
Class : Class 5
YES OPTION C IS CORRECT

Ans 2:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4
C

Ans 3:

sauradeep from j v m Shyamali , ranchi
Class : Class 5

Ans 4:

sauradeep from j v m Shyamali , ranchi
Class : Class 5

Ans 5:

AREEN from BOLTON SCHOOL, Secunderabad
Class : Class 5
Answer is A because tailor bird uses its beak like a needle to sew leaves and other material to make a nest.weaver bird weaves and makes a nest.

Ans 6:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 5
option CSOF waalon ans. change karo

Ans 7:

SHAH HITANSH JINESH from S H KHARAWALA, AHMEDABAD
Class : Class 6
The Weaver bird uses its beak like a needle to sew leaves and other materials to make a nest,that's true............ The Penguin collects a few pebbles and stones to make a nest,that's true........... Eagles and vultures simply put a few sticks together,that's false........... The Woodpecker pecks a tree trunk with its beak to make a hole for nest,that's true............ So,OPTION (C) will be INCORRECT.

Ans 8:

Rajas Khare from P G Garodia school, Mumbai
Class : Class 4
Option C is correct

Ans 9:

ADITYA ROY from VIDYASAGAR SHISHU NIKETAN, MEDINIPUR
Class : Class 5
option C is the right answer

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Dhairya Godbole from KLE Eng Medium School, SOLAPUR
Subject :NSO    Class : Class 4

Ans 1:

AREEN from BOLTON SCHOOL, Secunderabad
Class : Class 5
Answer is B.

Ans 2:

Manya Pujar from EuroSchool, Davangere
Class : Class 4
ans is B as knife and axe have one inclined plane

Ans 3:

n from IHS, JALANDHAR
Class : Class 6
The answer is D!!!!!!!!!!!!!

Ans 4:

from ,
Class : Class 5
What is an inclined plane ?

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Vidhya M. from Vibgyor High Bannerghatta, Bangalore
Subject :NSO    Class : Class 4

Ans 1:

BV Karthikeya from Sentia, Hyderabad
Class : Class 5

Ans 2:

BV Karthikeya from Sentia, Hyderabad
Class : Class 5

Ans 3:

BV Karthikeya from Sentia, Hyderabad
Class : Class 5

Ans 4:

Abhinav Kulkarni from National Centre For Excellence, Bengaluru
Class : Class 4
dddddddddddd should be the ans

Ans 5:

ASHMI Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
Please explain

Ans 6:

Maniska nayak from KIIT international, Bhubaneswar
Class : Class 4
how is it A? What is happening in A?

Ans 7:

S Nithyanth from Geethanjali Vidyalaya, Bangalore
Class : Class 4

Ans 8:

KUNAL JHAM from The Shishukunj International School, INDORE
Class : Class 5

Ans 9:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
correct

Ans 10:

AREEN from BOLTON SCHOOL, Secunderabad
Class : Class 5
Answer is D because in option A the water is going to the bottle and in option D it's just blowing air.

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Tanya A Mandali from Sri Kumaran Public School , Bangalore
Subject :NSO    Class : Class 5

Ans 1:

Vyom from St KABIR , Ahmedabad
Class : Class 5
question no 19 and 20 are coming together.

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Tanya A Mandali from Sri Kumaran Public School , Bangalore
Subject :NSO    Class : Class 5

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Anant V Manoj from Bharatiya Vidya bhawan, Thrissur
Subject :NSO    Class : Class 7

Ans 1:

Nabhajit Bhar from Techno India Group Public School, Chinsurah
Class : Class 7
option B

Ans 2:

Papiya Biswas from ARMY PUBLIC SCHOOL, Kolkata
Class : Class 5
option B

Ans 3:

Sunidhi chatterjee from Carmel school kargali , Bokaro
Class : Class 7
I think it's option b earthworm

Ans 4:

Anant V Manoj from Bharatiya Vidya bhawan, Thrissur
Class : Class 7

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Karmanya Gupta from DPS, Udaipur
Subject :NSO    Class : Class 5

Ans 1:

AHELI CHAKRABARTI from BGS INTERNATIONAL PUBLIC SCHOOL, DWARKA
Class : Class 3
Option D has a backbone for sure so the answer should be either A,B or C.

Ans 2:

Niten Mohan from ,
Class : Class 2
According to Known Scientific facts options a) b) and c are non vertebrate so why are Options a and b are not part of right answer? At times quality of questions raise a doubt about due diligence being put in articulating the questions .

Ans 3:

Mohammed Najl from GEMS New Millennium School Al Khail, Dubai
Class : Class 5
i think it is option a b and c

Ans 4:

Aryan Sirohi from Mount LItera Zee School, Bangalore
Class : Class 6
D

Ans 5:

Rudra Tripathi from DPS ASANSOL, Asansol Burdwan
Class : Class 5
According to scientific facts all reptiles have backbone . If they didn't have a backbone they couldn't crawl .

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DHEER PANDEY from CORNERSTONE SCHOOL, Hyderabad
Subject :NSO    Class : Class 4

Ans 1:

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

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YATIKA.GANDHI from Delhi Public School, Noida
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

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

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