National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
During the day, land gets heated up much faster than the water in the sea .As the land becomes hot , it heats the air above it. this hot air rises up and the cool air from the sea blows towards the land to take its place . this wind that blows from the sea towards the land during the day is called the sea breeze . At night , the land cools down much faster than the sea which , in turn., cools the air above the land . The air above is still warmer . This warm air rises up and the cool air from the land rushes towards the sea to take its place .This wind that blows from the land towards the sea at night is called the land breeze .

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 4
neal river

Ans 2:

Class : Class 5
nile is the lonest river.

Ans 3:

Class : Class 5
nile is the longest river in the world

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
As an "ink remover" to remove ink off clothes.

Ans 2:

Class : Class 9
NH4OH is the chemical name of ammonium hydroxide.It is nitric acid.

Ans 3:

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

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Subject :NSO    Class : Class 7

Ans 1:

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.

Ans 2:

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

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
caco3

Ans 2:

Class : Class 6
the answer is - calcium carbonate

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
pavour hydrogine

Ans 2:

Class : Class 9
no full form available

Ans 3:

Class : Class 8
It is the negative logarithm of H+ ions

Ans 4:

Class : Class 8
pH means power of hydrogen

Ans 5:

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 6:

Class : Class 7
The full form is povouir hydrogene

Ans 7:

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 8:

Class : Class 7
pH is a scale used to specify the acidity or basicity of an aqueous solution

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
bases that are completely soluble in water

Ans 2:

Class : Class 8
Alkalies are the bases that are soluble in water.Some bases are not soluble in water they are not called alkalies

Ans 3:

Class : Class 8
Alkalies are the bases which are soluble in water

Ans 4:

Class : Class 8
Alkalis are water-soluble bases. They are spelt 'alkalis and not alkaleis'.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 10
Mixture whose components are not uniform means having different properties

Ans 2:

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 3:

Class : Class 8
Mixtures which are not uniform

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
mixtures in which the properties of the elements are retained

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
A Homogenous Mixture contains a uniform composition type of a mixture. Some examples, are air.

Ans 2:

Class : Class 7
A mixture which has uniform composition and properties throughout. Ex:air

Ans 3:

Class : Class 8
A mixture which is uniform is called homogenous mixture

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