Assertion :Emission of light during a chemical reaction is known as chemiluminescence. Reason: Some substances absorb radiation when exposed to it and immediately re-emit the energy absorbed.

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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If both Assertion and Reason are correct, but Reason is not the correct explanation of assertion.

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If Assertion is correct, but Reason is incorrect.

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If Assertion is incorrect, but Reason is correct.

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Solution

The correct option is B If both Assertion and Reason are correct, but Reason is not the correct explanation of assertion.
Both assertion and reason are correct, but reason is not the correct explanation of assertion.
Chemiluminescence (CL) is the emission of light as a result of a chemical reaction as a result of a chemical reaction, as a result of an excited electronic molecular state, formed in a chemical reaction, rehearsing to the ground state.
But some substances (like $C O_{2}$ ) absorbs and re emits infrared radiation.

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Similar questions

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

Q. Assertion: Average kinetic energy in one oscillation during

SHM

of a body is

\frac{1}{4} m ω^{2} A^{2}

.
Reason: Maximum kinetic energy is

\frac{1}{2} m ω^{2} A^{2}

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

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