Question

what is mean chemical reaction????​

Answer 1

Answer: when an acid or chemical gives you allergies or disturbs your body reacts.

Explanation:when an acid or chemical gives you allergies or disturbs your body reacts.

Answer 2

Means where the substance change into different substance which makes a new chemical substances

Types of chemical reaction:

• Combination reaction
• Decomposition reaction
• Displacement reaction
• Double Displacement reaction
• Precipitation Reaction

Combination reaction

Where more reactants combines to form one single product .

Example of combination reaction: 2Na + Cl2 → 2NaCl

Decomposition reaction

Means where a single compound breaks to form more simpler compunds

Example of a decomposition reaction: CaCO3 → CaO + CO2

Displacement reaction

A chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution

Example of displacement reaction: Zn + CuSO4 → ZnSO4 + Cu

Double Displacement reaction

A chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.

Example of double displacement reaction:

BBaCl2 + Na2SO4 → BaSO4 + 2NaCl

Precipitation Reaction

A chemical reaction that involves the formation of an insoluble product (precipitate; solid) is called Precipitation reactionb