In the official rules of socer, what happens when a player touches the with his hands?

Answer 1

When the ball is in play, no player may touch the ball with his/her hands from fingers to elbow. Only the Goal-keeper can touch it in that manner within the 18 yard line of his own goal area. The goalie may not touch the ball with his hands if the ball was passed back by his own team mate. If he does, it will be considered a back-pass & will result in a penalty kick for the opposing team. Any player may hold a ball while it is out of play & also when they are performing a "throw-in" from a sideline.

Answer 2

There are many "hand" infractions, I have only posted a few. Click the link at the very bottom and look at all of them. The one you are probably thinking of turns the ball over to the other team, often with a kick.

Indirect Free Kick
An indirect free kick is awarded to the opposing team if a goalkeeper,
inside his own penalty area, commits any of the following four offences:
• takes more than six seconds while controlling the ball with his
hands before releasing it from his possession
• touches the ball again with his hands after it has been released
from his possession and has not touched any other player
• touches the ball with his hands after it has been deliberately kicked to him by a team-mate
• touches the ball with his hands after he has received it directly from a throw-in taken by a team-mate

Decision 3
Subject to the terms of Law 12, a player may pass the ball to his own
goalkeeper using his head or chest or knee, etc. If, however, in the
opinion of the referee, a player uses a deliberate trick while the ball is
in play in order to circumvent the Law, the player is guilty of unsporting
behaviour. He is cautioned, shown the yellow card and an indirect
free kick is awarded to the opposing team from the place where the
infringement occurred. * (see page 3)
A player using a deliberate trick to circumvent the Law while he is
taking a free kick is cautioned for unsporting behaviour and shown
the yellow card. The free kick is retaken.
In such circumstances, it is irrelevant whether the goalkeeper subsequently
touches the ball with his hands or not. The offence is committed
by the player in attempting to circumvent both the letter and
the spirit of Law 12.

Free kick taken by a player other than the goalkeeper
If, after the ball is in play, the kicker touches the ball a second time
(except with his hands) before it has touched another player:
• an indirect free kick is awarded to the opposing team, the kick to
be taken from the place where the infringement occurred
* (see page 3)

Answer 3

Free kick or yellow card.. the refs decision