Question

Concise chemistry of class 9th chapter 2 chemical changes and reactions

Answer 1

heyya !!

Answer:

 A chemical reaction is the process of breaking the chemical bonds of the reacting substances (reactants) and making new bonds to form new substances (products).

Conditions necessary for a chemical change or reaction are

     (i) Evolution of gas

    (ii) Change of colour

    (iii) Formation of precipitate

    (iv) Change of state

Explanation:

 Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)

AgNO3(aqueous) + KCl(aqueous) —–AgCl(precipitate) + KNO3(aqueous)

here u go bruh!