Advertisements
Advertisements
Question
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Advertisements
Solution
A chemical reaction involves the breaking of existing bonds between atoms or groups of atoms of the reactants and leading to formation of new bonds forming new substances called the products.
APPEARS IN
RELATED QUESTIONS
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Condensation of steam is not a chemical change.
Complete and balance the following chemical equation:
\[\ce{Pb(NO3)2 ->[Heat]}\]
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
What are homogenous reactions ?
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
Explain by writing a word equation.
Hard water gets softened on mixing with a solution of washing soda.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
Give a chemical test to distinguish between the following gases.
CO2 and SO2
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
A chemical change may involve –
Heat may evolve or be absorbed during a ______ change.
