Natural selection can lead to stabilisation,
directional change and disruptive changes."
Explain the terms stabilization, directional change and disruptive change mentioned above.

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. What change can we observe?

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. Give an example.

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. Name the defect.

A car battery Is made of lead plate dipping Into sulphuric acid (Lead Accumulator). It can be recharged. When the battery is used a reaction takes place. Identify the change to this reaction when the battery is recharged and represent the reactions at the anode of the cell.

A particle executing SHM is an example of _________. (i)acceleration of constant magnitude and direction. (ii)acceleration of changing magnitude and direction. (iii)acceleration of changing magnitude but constant direction. (iv)acceleration of constant magnitude but changing direction.

a) Give the relation between change in enthalpy and change in free energy. b) Name the above relation. c) What is the significance of the above relation?