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Roma singh from RBK Global School, Maharashtra
Subject :NSO    Class : Class 7

Ans 1:

G. Priyanka from Chennai Public School, Chennai
Class : Class 8
if you mix acetic acid.....that is vinegar in hydrogen carbonate that is [again...;)] ....baking soda it releases carbon dioxide. It is used in mostly in flour doughs to give a rise as a substitute to yeast..............................................please like........

Ans 2:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
CH3COOH+NaHCO3=CH#COONa+H20+CO2

Ans 3:

Pulkit mittal from GAIL DAV PUBLIC SCHOOL, AURAIYA
Class : Class 9
DO IT PRACTICALLY U WILL GET

Ans 4:

Swetanshu Sekhar Pati from Amity International School, Noida
Class : Class 9
When we mix vinegar with baking soda CO2 will be released

Ans 5:

nasr2607@gmail.com from Aurum the Global School, Haldwani
Class : Class 8
CH3COOH(acetic acid) + HCO3(hydrogen carbonate) ---------- NaC2H3O2(sodium acetate) +CO2

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Roma singh from RBK Global School, Maharashtra
Subject :NSO    Class : Class 7

Ans 1:

Ananya from Delhi Public School, Meerut
Class : Class 7
Mercury is used in thermometers becuase it expands easily and does not stick to the sides of the thermometer. Difference between clinical and lab thermometer- The range of clinical thermo.is between 35 degree celsius to 42degree celsius whereas the range of lab. thermo. is between -10degree celsius to 110degree celsius. CT are used to measure temp. of human body whereas LT is used to measure the temp. of objects other than the human body.

Ans 2:

Gyanepsaa from HUS International, Chennai
Class : Class 10
Mercury is used in thermometers with a higher range, as its freezing and boiling points are -39c and 360c while alcohol is used in those needing to measure a lower range with -114c and 78c respectively.

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Roma singh from RBK Global School, Maharashtra
Subject :NSO    Class : Class 7

Ans 1:

Ananya from Delhi Public School, Meerut
Class : Class 7
The four basic processes are- Ingestion Digestion Assimilation Excretion

Ans 2:

Soham chakravorty from Delhi public school, Bengaluru
Class : Class 7
ingestion : the process of taking in food through mouth opening digestion: is the process of breakdown of food into simple form with the help of digestive juices made in the body absorption: is the process by which food in the simple form passes into body fluids such as blood assimilation: is the process of using absorbed nutrients by the body cells for producing energy and for the growth of the body egestion: is the process of removing waste matter from the body.

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PRINCE from DON BOSCO ACADEMY , PATNA
Subject :NSO    Class : Class 6

Ans 1:

Akshatt Uppal from Chirec International School, Hyderabad
Class : Class 8
The answer is 30 litres(a). Tank A: 45+30=75 Tank B:75/5=15 so the water transferred from Tank A to tank B so that each tank contains 45lit of water should be 30 litres [Tank A: 75-30=45; Tank B: 15+30=45]

Ans 2:

Aakash from Dpsrohini, New Delhi
Class : Class 6
Quantity of water in tank A= 5x Quantity of water in tank B= x Total quantity of water= 6x 6x=(45+45) litres 6x= 90 litres x=15 litres A=5X=75 LITRES, B=15 LITRES Quantity of water transfered from A to B=30

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jayashimman from sboa, Chennai
Subject :NSO    Class : Class 9

Ans 1:

Pulkit from Aryaman Vikram Birla- Institute of Learning, Haldwani
Class : Class 9
permanent hardness of water means it cannot be converted again into its soft state without strong boiling as it contains Ca and Mg salts..

Ans 2:

Sarthak Praveen Modhe from St. Thomas Convent Sr. Sec. School, Bhopal
Class : Class 9
as hard water contains dissolved magnesium and calcium ions

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abhinav from fitjee world school, Hyderabad
Subject :NSO    Class : Class 6

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Ritesh N Das from Adamas International School, Kolkata
Subject :NSO    Class : Class 6

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hanish gowda from vidyaniketan public school, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Ardhya Goyal from DPS Durg, Chattisgarh
Class : Class 7
HNO3 - NITRIC ACID H2S04- SULPHURIC ACID

Ans 2:

Tejas Shende from Kendriya Vidyalaya, IIT Campus, Powai, Mumbai, Mumbai
Class : Class 8
HNO3 and H2SO4 are strong and artificially made acids called as Nitric acid and Sulphuric acid respectively. They are used in perfume making, cleansing of metal containers, etc. and they are also used in chemical reactions.

Ans 3:

Ardhya Goyal from DPS Durg, Chattisgarh
Class : Class 7
HNO3 - NITRIC ACID H2S04- SULPHURIC ACID

Ans 4:

Kriti Kannan from Kendriya Vidyalaya Janakpuri, New Delhi
Class : Class 9
HNO3 = NITRIC ACID H2SO4 = SULFURIC ACID

Ans 5:

Pulkit mittal from GAIL DAV PUBLIC SCHOOL, AURAIYA
Class : Class 9
hno3 i snitric acid a very strong acid indeed a monobasic acid h2so4 is sulphuric acid ph is 1.4 highly corrosive used in lead storage batteries hope u get

Ans 6:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
HNO3 is Nitric Acid H2SO4 is Sulphuric Acid

Ans 7:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
HNO3=nitric acid H2SO4=sulphuric acid

Ans 8:

Nageswara Rao Rayala from new vison olmpiyad school, khammam,telangana
Class : Class 7
hno3=nitricacid or aquafortis,h2so4=sulphuric acid or oil of vitriol or king of chemical compounds

Ans 9:

Swetanshu Sekhar Pati from Amity International School, Noida
Class : Class 9
HNO3 = Nitric Acid H2SO4 = Sulphuric acid

Ans 10:

nasr2607@gmail.com from Aurum the Global School, Haldwani
Class : Class 8
HNO3 - NITRIC ACID , H2SO4 - SULPHURIC ACID

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Krithik from St Gregorios HIgh School, Mumbai
Subject :NSO    Class : Class 3

Ans 1:

Adithya Bharath M from Manipal School, Mangalore
Class : Class 7
E-mail

Ans 2:

Shagun from MAXFORT DWARKA, New Delhi
Class : Class 5
telephone

Ans 3:

Kirti Dwivedi from DR AMIN, Vadodara
Class : Class 5
A

Ans 4:

Shagun from MAXFORT DWARKA, New Delhi
Class : Class 5
Telephone

Ans 5:

suchir from dehli public school miyapur, Hyderabad
Class : Class 6
E-mail

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abhinav from fitjee world school, Hyderabad
Subject :NSO    Class : Class 6

Ans 1:

abhinav from fitjee world school, Hyderabad
Class : Class 8
oleum=h2s2o7 or disulphuric acid or fuming sulphuric acid

Ans 2:

Ritesh N Das from Adamas International School, Kolkata
Class : Class 9
disulfuric acid

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