Can anyone tell me a word in the English dictionary which has a silent 'z'?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

What does the below rebus puzzle mean?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

I have an eye but still cannot see.

Who am I?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

I am lying and I always lie. Tell me whether I am lying or telling the truth.

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?