WH QUESTIONS 

Who ? - ¿Quién? ¿Quienes?
What ? - ¿Qué? ¿Cuál? ¿Cuáles?
When ? - ¿Cuándo?
Where ? - ¿Dónde? ¿Adónde?
Which ? - ¿Qué? ¿Cuál? ¿Cuáles?
Whose ? - ¿De quién? ¿De quiénes?
Why ? - ¿Por qué? ¿Para qué?
How ? - ¿Cómo? ¿Cuán?

can never be answered with yes/no

WHO: 

information about a person

example:

who is your  father 
who is  that  person whit  the hat?

who do you like best ?
tom or jerry?

WHAT:

information about a thing or something general

example:

what is in  your bag?
what did you do yesterday?
what are they doing?

WHEN:

information about the time something happens

example:
when is your brother's birthday?
when are you going to finish you work?
when are we going home?

WHERE:

information about a place

Example:
where are you?
where do you work?
where is the front door rey?

WHICH:

choice between a few possibilities

Example:
which book is better, the blue or the red one?
which shirt should i wear?
the pink one the purple one?

which: choice between options
what shirt should i wear?
-> what rind of shirt
what no specific options

WHOSE:

who the owner of something is

Example :
whose computer is this
whose car is that
whose bike is this ?
it is Peter's bike?

WHY:

the reason for something

Example :

why is he going home?
why do you want to be a singer?
why are you learning english?

HOW:

the way in which something is done
how+other word:
quality or quantity
how was your trip?
how re you?

Example:
 how do you get to london?