Checked luggage is that which has been checked in: weighed, labelled, and taken away to be loaded onto the plane. You don't see it again until you have landed at the other end and the plane is unloaded. Hand luggage is that which you can take onto the plane with you and have access to during the flight.
No, usually the checked weight is different from the weight of the hand luggage. Check with your airline
No.
No, hair clippers are not allowed in hand luggage due to safety regulations. They should be packed in checked luggage instead.
No, hair clippers are generally not allowed in hand luggage when traveling due to safety regulations. It is recommended to pack them in checked luggage instead.
Yes you can,
Yes, but not more than 250ml.
If this is sealed, then you can but if not, better to put this in the checked bagage
Yes, but not within your hand luggage, as it will be confiscated. You can carry several bottles within the checked-in luggage, however.
Highly unlikely - since medicines are rarely dispensed under pressure. Any medication should be in your hand luggage - not checked luggage, as you may be asked to produce it at any time by airport staff.
Yes, you can carry a smartwatch in your checked luggage.
Yes, you can carry a watch in your checked luggage.
Yes, you can pack deodorant in your checked luggage.