Is can tomato juice still good even if its settled in the jar age unknown.?

It depends on the storage conditions and the appearance of the juice.

If the tomato juice has been stored in a cool, dark place, it may still be safe to consume even if it has settled in the jar. However, if the juice has been exposed to heat or light, it may have spoiled and should not be consumed.

Additionally, if the juice appears to be cloudy, discoloured, or has an off odour, it should be discarded. It is also important to check the expiration date on the jar to ensure that the juice is still safe to consume.

If you are unsure whether or not the tomato juice is still good, it is best to err on the side of caution and discard it.