FORM:

Wh question word  + verb + subject .
They are : 
What... Where...When...Who...Whose... Which...How...
How many ... How much

Wh- words:
What , Which and Whose: 

* Can be followed by a noun: 
What music do you like ? / Which bag is your? / Whose phone is this?
*What can be used if there are many possible answers: What do you want to eat?
*Which is used if there are a few answers: Which do you prefer;apples or pears?

Wh words: Whose, How...

Whose can be used to ask for personal possessions: Whose this wallet?
How can be used followed by an adjective or an adverb: How old...?, How fast...?
How can also be followed by "much or many":
How much cheese do you want? / How many dogs do you have?