Do not do this.
It is certainly unsafe.
Is the 220V plug 220V only or 110/220V? (The former will have 3 prongs and the former will have 4) If your case is the latter just use the ground, neutral, and one of the hots. This will give you 120V single phase. If the case is the former you can't get 110V off that plug.
Only if it is rated for 110V-220V. If it is rated for 110V only and you plug it into a 220V outlet, your device will be destroyed.
No. If you plug something that needs 24 volt into a 120v socket you will probably ruin your device.
Yes
General Electric makes and sells refrigerators that use 220 volt electricity. They are manufactured for use overseas, but are sold in the US as well.
Yes, no problem.
Do not do this.
No.
It is certainly unsafe.
No. Attempting to run an appliance on insufficient voltage can cause damage to the appliance and can be dangerous. Call an electrician and get him to install a 220v plug
Yes because it is of a higher rating. But make sure your equipment can take the rating too.
Is the 220V plug 220V only or 110/220V? (The former will have 3 prongs and the former will have 4) If your case is the latter just use the ground, neutral, and one of the hots. This will give you 120V single phase. If the case is the former you can't get 110V off that plug.
Only if it is rated for 110V-220V. If it is rated for 110V only and you plug it into a 220V outlet, your device will be destroyed.
Round 2-pin; 220V AC
If it is a dual voltage TV, yes.