Activate game on second account?

Not allowed.

FAQ:

You should only enter to win giveaways for yourself, and if you win a game, it must be activated and redeemed to the Steam account used during registration. If a friend is interesting in joining giveaways, they'll need to register for their own account.

Nope, you have to activate it on the same account =)

If you aren't willing to play a game then don't participate in the giveaways

why u got 2 steam accounts?

Having steam multiple accounts is offense in the first place.