Assume that the following code compiles without error in a client of the book class. what do you know about the book class?
book book1 = new book("secret coders", "gene luen yang");
book book2 = new book("alan turing: the enigma", 2014);
i. the book class has at least two constructors.
ii. the author name is needed to construct a book object.
iii. both the book title and publication year are required to construct a book object.
a. i only
b. i and ii only
c. i and iii only
d. ii and iii only
e. i, ii, and iii

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.

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