Assertion (A) All collision of reactant molecules lead to product formation. Reason (R) Only those collisions in which molecules have correct orientat Bissoy Answers

In a photon-particle collision (sauch as photon-electron collision), which of the following may not be conserved ?

Correct Answer - B (b) : In a photon-particle collision, (such as photon electron collision), the total energy and total momentum are conserved. However, the number of photons may not be...

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Assertion : Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Reason : Those aldehydes which have `alpha`-H atom undergo Cannizzaro rea

Correct Answer - C Aldehydes with no `alpha`-H atoms, undergo Cannizzaro reaction.

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Given below are assertion and reason. Point out if both are ture and reason is correct explanantion (A), both true but reason is not correct explanati

Correct Answer - B Cenozoic/Caenozoic. Geolocial era that began 65 million years ago. Marked by emergence of Himalayas and Alps, and spred of mammals.

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According to the collision theory, only the effective collisions among the reacting species result in the products. In order that the collisions may b

Correct Answer - D d) both energy of activation and frequency factor can be calcualted.

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Assertion: Rate of constant increases with the increase in temperature. Reason: Number of collisions increase with the increase in temperatures.

Correct Answer - B Correct explanation: Rate of reaction increases with increases in temperature because the number of effective collisions increase.

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Assertion: Rate of reaction doubles when the concentration of the reactant is doubled if it is a first order reaction. Reason: Rate constant also beco

Correct Answer - C c) Correct reason. Rate constant remains constant for the reaction and is independent of the initial concentration of the reason.

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Assertion : Plumbago is an allotropic form of lead. Reason: in Roman, lead is called Plumbum.

Correct Answer - D Assertion: Plumbago is another name of graphite like lead, graphite also marks paper.

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Assertion : In a semiconductor, the conduction electrons have a higher mobility than holes. Reason: The electrons experience fewer collisions.

Correct Answer - C Electrons experience much collisions. The mobility of electrons is more because they require less energy to move, not because they are lighter.

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Which of the above-mentioned statements/s is/are TRUE? A. only 1 B. only 2 C. only 3 and 4 D. only 1, 2 and 4

D. only 1, 2 and 4

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Assertion: Molecules that are not superimposable on their mirror images are chiral. Reason: All chiral molecules hae chiral centres.

Correct Answer - C Correct reason. Chiral molecules are dissymmetric in nature.

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Assertion (A) All collision of reactant molecules lead to product formation. Reason (R) Only those collisions in which molecules have correct orientat

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