Which reaction is a decomposition reaction? a. 2kclo3 → 2kcl + 3o2 b. 4na + o2 → 2na2o c. zns + 3o2 → 2zno + 2so2 d. 2nabr + caf2 → 2naf + cabr2

Answer : The decomposition reaction will be, (A)

Explanation :

Decomposition reaction : It is defined as the reaction in which a single larger compound decomposes to produce two or more smaller molecules as a product.

The general representation of decomposition reaction is :

From the given options,

(A) this reaction a decomposition reaction in which a potassium chlorate decomposes to give potassium chloride and oxygen gas as a product.

While the other reactions,

(B) this reaction is a combination reaction in which the two or more molecules combine to form a larger single molecule as a product.

(C) this is a double displacement reaction in which the cation and the anion of the two reactant exchange their places to give two another compounds as a product.

(D) this is a double displacement reaction in which the cation and the anion of the two reactant exchange their places to give two another compounds as a product.

Hence, the decomposition reaction will be,

idk

explanation:

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).