you get an adapter
You will burn up your appliance!!!!!
Off hand no but your explanations are not clear as to who is doing what to whom,,
Not only will it work, but it will last for much longer than if it was connected to 220volts!
No you cannot plug a 100v into a 120v outlet, it will fry whatever the product you are plugging up.
No. You can't replace a 220V outlet with a 110/220V outlet without running the requisite neutral wire. If you do you will blow out any device that expects the neutral line to be connected.
If I understand your question, Can you run a 110 appliance off of a 220 volt outlet? You could by only using one leg of the 220. You may also consider changing the outlet. Put in a regular 110 outlet and capping off one leg of the 220 in the wall box. You still have a neutral and a ground to work with. I read this as the questioner doesn't want to modify the outlet. Check the voltage ratings on the device. Many electronic devices nowadays can havdle 120V or 240V as it is cheaper to manufacture one powersupply and sell it everywhere. If your device is rated for 240V, you can put a 240V plug on it. If it only says 120V, no dice. 240V will burn it up.
Yes, you can plug a 240v motor into a 230v outlet.
You don't. The plug (cap) has a different configuration between the two voltages. This is to prevent plugging a device of one voltage into a supply of a different voltage.
If your trying to plug in a 110 Volt lamp into 240 volt outlet the answer is simple. You must buy a step down transformer, or your lamp will burn out.