National Science Olympiad Forum By SOF Olympiad Trainer - Page 831
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Pranav from Sri Aurobindo Memorial school, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
As an "ink remover" to remove ink off clothes.

Ans 2:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
The uses of ammonium hydroxide are as follows - To manufacture fertilizers like ammonium sulphate To manufacture rayon, dyes, etc.

Ans 3:

dev mishra from Bal Bhavan Public School, New Delhi
Class : Class 9
NH4OH is the chemical name of ammonium hydroxide.It is nitric acid.

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akshaj shukla from summer fields school, Gurgaon
Subject :NSO    Class : Class 7

Ans 1:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
neutralisation is when an acid reacts with a base to form a salt and H2O and some heat is liberated galvanisation is when you add a layer of zinc upon iron so that it does not rust

Ans 2:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
Neutralisation is the process of adding base to an acid whereas galvanisation is the process of coating a layer of zinc on iron.

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

Ans 1:

Krish Sharma from Delhi Public School, New Delhi
Class : Class 6
the answer is - calcium carbonate

Ans 2:

abhinav from fitjee world school, Hyderabad
Class : Class 8
caco3

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Vedant Mehta from Bhagwati International Public School, Patan, Gujarat
Subject :NSO    Class : Class 7

Ans 1:

ANSH from DAYANAND PUBLIC SCHOOL, SHIMLA
Class : Class 8
pavour hydrogine

Ans 2:

Pulkit mittal from GAIL DAV PUBLIC SCHOOL, AURAIYA
Class : Class 9
potense of hydrogen or power of hydrogen is basically a test used to determine strengh of a acid or a base.

Ans 3:

Julian Thomas Abraham from Madhava Kripa school , Manipal
Class : Class 8
It is the negative logarithm of H+ ions

Ans 4:

Gyanajyoti Mishra from J.N.V., Jajpur
Class : Class 10
pH means power of hydrogen/ povouir hydrogen, means concentration of hydrogen ions in an aqueous solution.So it is used to identify whether a substance is acid,base or neutral.

Ans 5:

riddhikaa from sri kumaran public school, Bengaluru
Class : Class 7
The full form is povouir hydrogene

Ans 6:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
pH means power of hydrogen

Ans 7:

akshaj shukla from summer fields school, Gurgaon
Class : Class 7
pH is a scale used to specify the acidity or basicity of an aqueous solution

Ans 8:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
no full form available

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dev mishra from Bal Bhavan Public School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
Alkalies are the bases which are soluble in water

Ans 2:

G. Priyanka from Chennai Public School, Chennai
Class : Class 8
bases that are completely soluble in water

Ans 3:

Sanchay from BIS Dwarka, Dwarka
Class : Class 8
Alkalis are water-soluble bases. They are spelt 'alkalis and not alkaleis'.

Ans 4:

Vedant Mehta from Bhagwati International Public School, Patan, Gujarat
Class : Class 8
Alkalies are the bases that are soluble in water.Some bases are not soluble in water they are not called alkalies

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dev mishra from Bal Bhavan Public School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

Soham chakravorty from Delhi public school, Bengaluru
Class : Class 7
so i hope you know what a mixture is. well a mixture a mixture is two or more elements or compounds mixed together but not chemically combined are called mixtures . they can be easily seperated. example: air is mixture of gases like nitrogen oxygen etc. now a heterogenious mixture is a mixture that composes of components that are not uniform and have totally different properties. i hope this answer helps.

Ans 2:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
Mixtures which are not uniform

Ans 3:

Gyanajyoti Mishra from J.N.V., Jajpur
Class : Class 10
Mixture whose components are not uniform means having different properties

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dev mishra from Bal Bhavan Public School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

Pranav from Sri Aurobindo Memorial school, Bengaluru
Class : Class 9
mixtures in which the properties of the elements are retained

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dev mishra from Bal Bhavan Public School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

riddhikaa from sri kumaran public school, Bengaluru
Class : Class 7
A mixture which has uniform composition and properties throughout. Ex:air

Ans 2:

Manas Malla from Visakha Valley School, Visakhapatnam
Class : Class 8
A mixture which is uniform is called homogenous mixture

Ans 3:

Aman sahu from Arya Gurukul, kalyan
Class : Class 8
A Homogenous Mixture contains a uniform composition type of a mixture. Some examples, are air.

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Animesh Mishra from DPS NORTH BANGALORE, BENGALURU
Subject :NSO    Class : Class 2

Ans 1:

SAIHAAN MULTANI from HILLS HIGH SCHOOL, Surat
Class : Class 4
milkyway

Ans 2:

SAIHAAN MULTANI from HILLS HIGH SCHOOL, Surat
Class : Class 4
milkyway

Ans 3:

Azaan Abdullah from Green Apple Public School, Baddi
Class : Class 4
Milky Way ( Aakash Ganga)

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Pratik Mohan Parida from st.xavier's high school, Dhenkanal
Subject :NSO    Class : Class 6

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