What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

A couple went on a climbing trip. But only the husband returned from the vacation and said that his wife slipped off while climbing and died. On investigating, the local sheriff arrested him saying, 'Your travel agent called. You murdered your wife.'

The man did not inform anyone about the trip. Then how was the agent so sure that it was a murder?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

What you cannot hold but it is yours?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What demands an answer, but asks no questions

What is next number in the pattern below:

131 517 192 123 ?

By using 'because' continuously three times, can you make an English statement ?

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 ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?