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

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प्रश्न

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

Copper nitrate.

एक शब्द/वाक्यांश उत्तर

उत्तर

Solid residual product of thermal decomposition of:

Copper nitrate is copper oxide \[\ce{CuO}\] Black
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अध्याय 2: Chemical Changes & Reactions - Chemical Changes & Reactions

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विराफ जे दलाल Simplified ICSE Chemistry [English] Class 9
अध्याय 2 Chemical Changes & Reactions
Chemical Changes & Reactions | Q 6.1

संबंधित प्रश्न

 Fill in the blank.
 The formation of gas bubbles in a liquid during a reaction is called ......................


FILL IN THE BLANK

On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.


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


Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.


Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.


Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.


Match the pairs.

a. Photosynthesis i.  Tendency to lose electrons
b. Water ii.  Reactant in combustion process
c. Sodium chloride iii.  Chemical change
d. Dissolution of salt in water  iv.  Covalent bond
e. Carbon v.  Ionic bond
f. Fluorine vi.  Physical change 
g. Magnesium vii.  Tendency to form anion

Complete and balance the following reaction:

\[\ce{CuCO3 ->[\Delta]}\]


Name: A brown gas 


State the original colour of the following substance and colour of residue obtained after heating.

Copper carbonate


Give a chemical test to distinguish between the following gases. 

CO2 and SO2


Give a chemical test to distinguish between the following gases. 

NH3 and HCl


Distinguish by heating the following in dry test tubs.

Zinc carbonate, Copper carbonate and lead carbonate.


Limestone contains ______ mainly.


Burning of paper is the best example of ______ change.


Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.


Iron and rust are the same substances.


Magnesium + oxygen → magnesium oxide.

2Mg + O2 → 2Mg O


______ is a chemical substance is used in whitewashing.


When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.


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