*urgent*

substances dissolve through three processes:

i. ionization

ii. dissociation

iii. dispersion

which lists the dissolving processes that change the identity of a substance?

a) ii and iii
b) i
c) i and ii
d) i and iii
e) i, ii, and iii

B) IONIZATION

Explanation:

Ionization occur when substance gain or lost the electron and form the ions.

when substance are changed into ions their identity changed.

So we can say that it is a chemical change and substance lost their identity.

For example:

The polar covalent compound HCl ionized and gives H⁺ and Cl⁻ ions. These ions have different properties from parent compound HCl.

While in case of dissociation identity remain same. Consider the dissociation of ionic compound they just dissociate into respective ions . This is a physical change and identity of substance remain same.

For example:

Ionic compound sodium chloride dissociate into sodium(Na⁺) cation and chloride(Cl⁻) anion.

while in case dispersion particles are dispersed into continuous phase without losing their identity.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.