All the collisions among reactant molecules are not effective to bring in a change " - Justify the statement .

This question has Statement I and Statement II. Of four choices given after the Statements choose the one that best describes two statements Statement-I : Every collision among reactant molecules is not responsible for the formation of products. Statement-II: An active molecule can give rise to the formation of products.

How will you justify that the collisions among the gas molecules are perfectly elastic?

Assertion (A) : All collisions between the reactant molecules result in product formation . Reason (R) : The collision between molecules having sufficient amount of energy and proper orientations, results in the formation of compounds.

All vertebrates are chordates but all chordates are not vertebrates. Justify the statement.

All vertebrates are chordates but all chordates are not vertebrates. Justify the statement.

Production of X-rays and emissions of electron in photoelectric effect are two opposite phenomena." Justify the statement.

All effective collisions ( having the threshold energy) do not necessarily bring in a chemical change. Explain with an example.

"The total kinetic energy of the molecules in an ideal gas with a volume V at pressure P and temperature T is equal to the total kinetic energy of the molecules present in the same volume of another ideal gas at the same pressure and at temperature 2T"-Justify the statement.

The molecule of any compound composed of two dissimilar elements is always polar-justify the statement.

There occurs no exchange of heat between a system and its surroundings in an adiabatic process. So, the change in entropy of the system is zero in this process. Justify the statement.