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Shuvangi Das from Vivekananda mission school, haldia
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

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

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Rio Choudhury from South Point High School, Kolkata
Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Molars and Premolars are mainly used to chew the food.

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vaibhav from , Faridabad
Subject :NSO    Class : Class 7

Ans 1:

aryan vir from lotusvalley international school gurugram, Gurgaon
Class : Class 7

Ans 2:

Tanushree from Asian International School, Colombo
Class : Class 7
Can someone pls send the explanation of why it's D🙏

Ans 3:

aryan vir from lotusvalley international school gurugram, Gurgaon
Class : Class 7

Ans 4:

Arush from Anandi Public School, Udgir
Class : Class 3

Ans 5:

aryan vir from lotusvalley international school gurugram, Gurgaon
Class : Class 7

Ans 6:

Arush from Anandi Public School, Udgir
Class : Class 3
such questions r always confusing.................

Ans 7:

Sporangia from SBOA Global, Chennai
Class : Class 7
The solution: Enzyme X works best and increases the rate of reaction at an acidic pH (less than 7) of about two2️⃣ ! Enzyme Y is very very very very very very very very very very very very very very very very very efficient @ slightly acidic pH i.e., slightly less than seven!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Enzyme Z is most efficient at an alkaline pH (more than 7!!!). And alkali means a base which is soluble in water. In humans, gastric juice of stomach (a J-shaped bag with thick inner walls. Meh.) has pH in the range of 1.5-2.5, where enzymes such as pepsin, rennin etc. carry out the digestion of food. Thus, enzyme X can be found in stomach. Similarly, the saliva in the mouth of humans has sliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiightly acidic pH of 6.8, where salivary amylase enzyme is moooooooooooooooooooooooooooooooooooooooost effective! Thus, enzyme Y can be found in the buccal cavity. Small intestine has slightly alkaline pH of 7.8, where enzymes such as trypsin help in digestion of food. So, enzyme Z can be found in duodenum. Morus Alba is the scientific name of mulberry.

Ans 8:

Sporangia from SBOA Global, Chennai
Class : Class 7
Is D. ✔

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ABHAY AGARWAL from ,
Subject :NSO    Class : Class 4

Refer to the given paragraph and table and answer the following questions.
Neha took 100 gm each of three types of soil, X, Y and Z, in three separate pots with hole at the bottom. The amount of water that was poured in the soil pot, just before it started dripping from the bottom hole, is tabulated here.

The soil that is mixture of clay, sand, humus and is usually very good for growth of most plants is __________.

A X
B Y
C Z
D Cannot be determined


Ans shd be D (Cannot be determined)

Ans 1:

ABHAY AGARWAL from ,
Class : Class 3

Ans 2:

ANURADHA NAIR from SANDEEPANI VIDYA NIKETHAN SCHOOL, Thrissur
Class : Class 5
B IS THE ANSWER ANURADHA NAIR 4C

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ABHAY AGARWAL from ,
Subject :NSO    Class : Class 4

Ans 1:

Adit Aggarwal from Vibgyor High, Bengaluru
Class : Class 5
The answer was supposed to be CFC .

Ans 2:

Anika from Alphabets, Chennai
Class : Class 4
Chloro-fluro-carbon

Ans 3:

Mohammad Shahid from Dayawati Modi International Maple Bear, Modipuram, Meerut 250110, Meerut
Class : Class 4
how the released gas from refrigerator is CO2

Ans 4:

SRISANTH from Edify, Tirupathi
Class : Class 4
Actually it is b ,as a is CNG(compressed natural gas which is a energy source that is not a greenhouse gas

Ans 5:

Shaurya Veer from camdbrige, palampur
Class : Class 5
The correct answer should be CFC

Ans 6:

Rehaan Sejwal from Gyan Bharati school, Delhi
Class : Class 5

Ans 7:

ABHAY AGARWAL from ,
Class : Class 3

Ans 8:

BV Karthikeya from Sentia, Hyderabad
Class : Class 5

Ans 9:

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

Ans 10:

SAURISH from Podar, Mumbai
Class : Class 4
THE OPTION SHOULD HAVE BEEN CFC OR WE CAN TAKE THE OPTION D [NITROGEN] BUT IT IS SHOWING WRONG

Ans 11:

Visakha Dhar from GD Goenka, jhajjar
Class : Class 3
the correct answer is CFCs .but is not mention in the option.

Ans 12:

Deepika from Vibgyor high, Mumbai
Class : Class 1
It should be CFCS

Ans 13:

BV Karthikeya from Sentia, Hyderabad
Class : Class 5
I GOT IT CORRECT

Ans 14:

Nishchita Singh from Gems Modern Acadmey , Dubai
Class : Class 4
The answer is B as when we use electricity fuel gets burnt and so it produces carbon dioxide.

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Jairaj Singh Basur from Vivek High School, Chandigarh
Subject :NSO    Class : Class 6

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shashwat pal from mnr school of excellence, navi mumbai
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

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shashwat pal from mnr school of excellence, navi mumbai
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

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Pradanya from KV IIT, Chennai
Subject :NSO    Class : Class 6

Ans 1:

from , dhule
Class : Class 7
master answwer really

Ans 2:

SANJEEV VARSHNEY from Lotus valley international school, Noida
Class : Class 5
ans is D

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Pradanya from KV IIT, Chennai
Subject :NSO    Class : Class 6

Ans 1:

Parthvi Mishra from DPS Nacharam, Hyderabad
Class : Class 6

Ans 2:

Amruta Deshmukh from phoenix greens international school, Hyderabad
Class : Class 6
It should be B as no change of current is there in Y.

Ans 3:

Raghav from Shalom Hills International school, Gurgaon
Class : Class 6

Ans 4:

Irresh Vijay from NPSI Singapore, Singapore
Class : Class 6

Ans 5:

Ishaan Das Roy from Sri Chaitanya Techno School, Bengaluru
Class : Class 8

Ans 6:

khushi Joshi from Svkm , Mumbai
Class : Class 8
I agree with Abhaid Goel.

Ans 7:

Agustya vaid from Somerville school vasundhara enclave, Delhi
Class : Class 6
i agree with him too

Ans 8:

Abhaid Goel from Indian School , Muladha
Class : Class 8
correct answer should be option B because there is no change in the current passing through lamp Y.

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