True or false pages with an informational or educational purpose should always be given higher page quality (pq) ratings than entertainment or gossip pages.

That statement is false

Page quality is determined by how well the page matched the queries. If the queries is something about entertainment and you landed on a page that provide the entertainment information that is placed in the queries, that page should be given a high page quality 

answer: when the substance contain the two parts (polar and non-polar) like soap.

explanation:

soap is produced from the basic hydrolysis of ester "saponification", it is considered as a salt of hydrocarbons. the soap molecule contains the two parts: a polar group   (-coo-na+) and a non-polar group (r-hydrocarbon part). the polar group is called the head and the tail is the non-polar group. the polar group is hydrophilic in nature (water loving) and the non-polar group is hydrophobic in nature (water repelling).the polar/non-polar nature of a substance is useful that it can dissolve the non-polar substances by the polar part and also can dissolve the polar substances by the non-polar part. it commonly used in detergents and soaps.