Chemical Reactions
Chemical Reactions: Overview
This topic gives a detailed explanation of how haloalkanes and haloarenes react with metals. It also covers some elimination reactions and explores the mechanism of nucleophilic reactions.
Important Questions on Chemical Reactions
Which of the following can conduct electricity when electricity is passed through them?
In a dry cell, _____ energy is changed into electrical energy.
In a dry cell, electrical energy is changed into chemical energy.
Which of these gases has a pungent smell?
When iron sulphide reacts with sulphuric acid, the smell of the gas evolved is characterised by:
The gas evolved when ammonium chloride is heated is characterised by:
What is a decrepitation reaction?
The reactions in which a precipitate is produced are known as decrepitation reactions.
Observe the below chemical equation and identify the products for the II reaction:
Observe the below reaction and identify the reactants:
In an electrochemical cell, chemical energy changes to _____ energy.
In the given chemical equation, identify the reactant(s):
One example where supplying light energy is necessary for a chemical reaction is:
Calcium oxide reacts with water to form calcium hydroxide along with the evolution of heat is an example of _____ reaction.
Two non-metals react sometimes explosively when brought in close contact.
Identify the colour of the precipitate formed in the reaction involving addition of iron (II) sulphate to sodium hydroxide.
The silver residue obtained on heating mercury (II) oxide is mercury. This is an example of a decomposition reaction.
A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.
A chemical reaction in which on heating shows colour change from brown to yellow is:
Ammonia and hydrogen chloride are gases that combine to form ammonium chloride, that is in _____ state.
