Complete the electron pushing mechanism for the formation of the given cyclic acetal under acidic conditions by adding any missing atoms, bonds, charges, nonbonding electrons, and curved arrows.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i just learnt this recently but i need to look through my notes again