Chemistry
Assertion (A): A chemical reaction can be written in the form of a chemical equation with the help of symbols and formulae of the substances involved.
Reason (R): In a chemical equation, the reactants are written on the right hand side and products are written on the left hand side of the arrow.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Chemical Equation
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Answer
A is true but R is false.
Reason — A is true as a chemical reaction is written using symbols and formulae.
R is false as reactants are written on the left and products are written on the right side.
Therefore, A is true but R is false is the correct option.
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Related Questions
One of the conditions necessary for a chemical reaction to occur is :
- Evolution of a gas
- Physical contact between reactants
- Change in colour
- Formation of a precipitate
What happens when a chemical reaction takes place ?
- A precipitate is formed
- A gas is evolved
- The substance changes its colour
- All of the above
Assertion (A): There is a need to balance a chemical equation.
Reason (R): Matter can neither be created nor be destroyed, it can only be converted from one form to another.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): When a few drops of an aqueous solution of silver nitrate are added to the aqueous solution of sodium chloride, a white precipitate of silver chloride is formed.
Reason (R): Some substances react only when they are heated together.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.