मराठी

Define the Following Terms Precipitate - Chemistry

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प्रश्न

Define the following terms

Precipitate

व्याख्या

उत्तर

Chemical reactions which are characterised by the formation of insoluble solid substances are called precipitates.

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पाठ 2: Chemical Changes and Reactions - Exercise 2 (A) [पृष्ठ २३]

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सेलिना Concise Chemistry [English] Class 9 ICSE
पाठ 2 Chemical Changes and Reactions
Exercise 2 (A) | Q 2.4 | पृष्ठ २३

संबंधित प्रश्‍न

How do the following help in bringing about a chemical change?

heat. 


Complete and balance the following chemical equations:

Zn + `"H"_2"SO"_4`  `→`

           (dil)


Write the missing reactants and products and balance the equations.

\[\ce{KClO3 ->[heat]}\] ___________+ ____________


FILL IN THE BLANK

In a ............ change, new substances are formed.


TRUE \ FALSE

Evaporation of water is a physical change. True or false ?


TRUE \ FALSE

Positively charged electrode is called the anode. True or false ?


What are biocatalysts ?


What are homogenous reactions ?


Define electrolysis.


Name three reducing agents ?


Explain the following reaction with one suitable example of Double decomposition reaction.


Give reason for the following:

Silver nitrate solution is kept in coloured bottles.


Give reason for the following:

Molybdenum is used in the manufacture of ammonia.


Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Ammonium dichromate.


Mention the various conditions required for a chemical reaction to occur.


Which of the following statement is incorrect for a chemical reaction?


Classify the following processes into physical or chemical changes:

(i) Beating of aluminium metal to make aluminium foil.

(ii) Digestion of food.

(iii) Cutting of a log of wood into pieces.

(iv) Burning of crackers.


How can we prevent rusting?


______ is the chemical name of limestone.


Write the effects of chemical reactions.


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