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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Ans 1:

Saranyaa Adak from Delhi Public School, Durgapur
Class : Class 10
Child's play though. calorific value=heat/unit mass of the fuel burnt =180,000/4.5 =40000 kJ/kg it is a question from our very own NCERT TEXTBOOK.

Ans 2:

ANIKA SHUKLA from UDGAM SCHOOL FOR CHILDREN, AHMEDABAD
Class : Class 10
Exactly.

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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Ans 1:

ARNAB MANDAL from NAVY CHILDREN SCHOOL, VIZAG
Class : Class 9
totally wrong

Ans 2:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 3:

Nimish shah from Chrysalis high , Banglore
Class : Class 8

Ans 4:

Saranyaa Adak from Delhi Public School, Durgapur
Class : Class 10
Sulfur dioxide and chlorine are not produced because CNG is composed of methane. The fact that it produces large amount of carbon dioxide is not helpful or advantageous by any means. Whether it is used in compressed form or not does not make it eco-friendly; but, yes, it produces no smoke SPM upon combustion. So correct answer is (B).

Ans 5:

Student from School, City
Class : Class 8
What is "Apache tomcat error"? I wrote a long answer and it vanished.

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Kriday from KDAV, Jamnagar
Subject :NSO    Class : Class 8

Which of the following are possible advantages of using bacteria in sewage treatment?
(i) Bacteria multiply quickly, thus producing a cheap and abundant source of enzymes.
(ii) Only one type of bacteria is required to provide the various enzymes necessary for different kinds of wastes.
(iii) Bacteria can break down waste under anaerobic or aerobic condition.

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


is only one kind of bacteria required to provide the various enzymes necessary for different kinds of wastes?because it was given so in the summary but in the solution it is showing this statement as false

Ans 1:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

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Agustya vaid from Somerville school vasundhara enclave, Delhi
Subject :NSO    Class : Class 6

Manisha took some vinegar in a test tube and added some baking powder to it. Then she lit a matchstick and brought it near the mouth of the test tube. The flame of matchstick got extinguished.
Which of the following is correct conclusion regarding the given experiment?

A Carbon dioxide gas does not support burning.
B Air contains carbon dioxide.
C Oxygen gas present in the air is necessary for burning.
D Oxygen gas can extinguish fire.


Ans 1:

Gargi from DPS school north, Bangalore
Class : Class 4

Ans 2:

Shivansh Pant from National Center For Excellence, Bangalore
Class : Class 10
A because co2 does not support burning

Ans 3:

Shriya from VIBGYOR High, Bangalore
Class : Class 10
A: Carbon dioxide gas does not support burning.

Ans 4:

Hitarth from Mushtifund High School , Goa
Class : Class 6
A

Ans 5:

Arav Gupta from Delhi Public School Gurgaon, Gurgaon
Class : Class 8
But it can also be c

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Agustya vaid from Somerville school vasundhara enclave, Delhi
Subject :NSO    Class : Class 6

Raveena covered a beaker of boiled water with a metal tray as shown in the diagram.

The beaker and metal tray were then removed from the tripod stand and left on the table. After two minutes, which of the following can be observed?

A Water droplets are seen on the outer part of metal tray.
B Water droplets are seen on the inner part of tray and inner part of the beaker.
C Water droplets are seen on the inner part of metal tray and outer part of the beaker.
D Water droplets are seen on the outer part of beaker only.


Ans 1:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4
answer is b

Ans 2:

Fellah Thashin from MS Dhoni global school , Hosur
Class : Class 6
It is A

Ans 3:

SKIyer from CNS, Mumbai
Class : Class 6
B, anybody marking something else is mad.

Ans 4:

Vedant from DON BOSCO, CHENNAI
Class : Class 2
somone

Ans 5:

Fellah Thashin from MS Dhoni global school , Hosur
Class : Class 6

Ans 6:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8
B

Ans 7:

Agustya vaid from Somerville school vasundhara enclave, Delhi
Class : Class 7
yeahhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

Ans 8:

Avyukt Sahoo from Glendale Academy International, Hyderabad
Class : Class 8
depends on the weather

Ans 9:

Shaurya Shrivastava from Amanora school, Pune
Class : Class 6
what are you saying it is a

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Mradul from Modern public school bhiwadi, Bhiwadi
Subject :NSO    Class : Class 7

Read the given data and select the correct option for the following questions.
Raman carried out an experiment to find out how fast water can pass through four different types of soil. He put each type of soil in four pots with equal sized holes at the base and placed separate dishes at their bottom to collect water. He poured water in them one by one, and used a stopwatch to record the time taken for water to reach the level he had marked same in each dish. His recording is given in the table as shown below.

Which soil is the most suitable for a plant that thrives in wet and clayey soil?

A W
B X
C Y
D Z


BIT GOOD

Ans 1:

Mradul from Modern public school bhiwadi, Bhiwadi
Class : Class 7
HURRAYWOWALASBEWAREBRAVO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Ans 2:

Mradul from Modern public school bhiwadi, Bhiwadi
Class : Class 7
IT IS C

Ans 3:

Mradul from Modern public school bhiwadi, Bhiwadi
Class : Class 7
BIT GOOD

Ans 4:

krishna tripathi from nahtfg, mjhiuhgh
Class : Class 8
D

Ans 5:

Ahaan Pathak from Treamis World School, Bangalore
Class : Class 8
It's surely D

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aditya ranjan from gyan niketan , patna
Subject :NSO    Class : Class 7

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Kshitij from Sams, Bangalore
Subject :NSO    Class : Class 6

Ans 1:

Nivy from Anan International School, Coimbatore
Class : Class 10
IT SHOULD BE D!!!!!!

Ans 2:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
ok sorry I think that they asked for comparing them and not telling whether there is shadow or not

Ans 3:

Shreyansh Garg from Mount St. Mary's School, delhi
Class : Class 6
No, it is correct because they never said that the stick was put upright.

Ans 4:

Aarush from Podar, Mumbai
Class : Class 10
The answer is ( a) . whoever posted the first answer is wrong.the answer is (a ) because the length of the shadow is the shortest at noon

Ans 5:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 6
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Ans 6:

Aarush from Podar, Mumbai
Class : Class 10
By tribal mushroom logical kick from New

Ans 7:

Aarush from Podar, Mumbai
Class : Class 10
By tribal mushroom logical kick from Ne thug girl

Ans 8:

Advaith m from New horizon public school, Bangalore
Class : Class 4

Ans 9:

Kshitij from Sams, Bangalore
Class : Class 6
the shadow will be none(null) according to theory that there shall be no shadow at all. thus the answer is (D)

Ans 10:

Irresh Vijay from NPSI Singapore, Singapore
Class : Class 8

Ans 11:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
there won't be any shadow because the sun is right above the stick

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Aditya Dash from Apeejay School, Noida
Subject :NSO    Class : Class 5

Ans 1:

Sohan R Jolapuri from Amanora School, Pune
Class : Class 5
Answer: B Explanation: Arrange the Question mathematically to get the following:- (1617/ 7) X 6 because 1617/7's 6th multiple is written in this way - (1617/ 7) X 5 because 1617/7's 5th multiple is written in this way. Calculate this like this:- 1617 / 7 = 231. So, (1617/ 7) X 6 = 231 X 6 = 1386 And, (1617/ 7) X 5 = 231 X 5 = 1155. Thus, we can calculate, 1386-1155 = 231 Hence, option B, with 231 as the answer, is correct.

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Ritabrata Das from OPJS, Angul
Subject :NSO    Class : Class 5

Ans 1:

harsh from saint pauls, jaipur
Class : Class 5
what does the arrow head represent?

Ans 2:

Aabhya Trigunayat from Seth MR Jaipuria, FATEHPUR
Class : Class 5
RFLUI6RIY7GKYUIJKGKJGGJGKJJKGKGGGGDFZSEMHJFYBNGJIU

Ans 3:

Vidisha Kumari from Brahm Prakash DAV school Hyderabad , Hyderabad
Class : Class 5
Answer is species B

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