Question

ZnCO3 (s) undergoes 'X' to give ZnO and CO2. What does 'X' symbolize here? *

1 point

Photochemical decomposition

Electrolysis

Displacement reaction

Thermal decompositio

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Answer 1

Explanation:

Thermal decomposition

Answer 2

Answer:

The correct answer is Option D i.e. Thermal Decomposition.

Explanation:

Photochemical decomposition is a reaction which is facilitated by sunlight.

Electrolysis is a reaction which occurs in a solution when electricity is passed through it.

In electrolysis, normally salts are decomposed into cations and anions.

Displacement reaction is a reaction in which the entities of two compounds are interchanged.

Thermal decomposition is a reaction which is facilitated in the presence of heat.

The decomposition of zinc carbonate occurs in the presence of heat.

Hence, Option D is correct.

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