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Question
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Options
Hydrogen
Copper [II] oxide
Oxygen
Copper [II] hydroxide
Ammonia
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Solution
Copper [II] oxide
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Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
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Give an example of a reaction where the following are involved
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Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Give reason for the following:
Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.
Give reason for the following:
Electrolytic decomposition of water is a reaction involving change of state.
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
A reaction between an acid and a base is called ______.
Beating an egg to make a cake is a ______.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
The chemical name of baking soda is sodium bicarbonate.
______ is a chemical substance is used in whitewashing.
Write the effects of chemical reactions.
