Yes, it is normal.
Yes, this water is evaporated.
Yes, fluoride can evaporate from water when it is heated.
Steam
Evaporate?
It evaporates
At higher temperature the continuous movement of water molecules is accelerated.
This is not true.
When heated blue copper sulphate solution does evaporate!!!! The result is BLUE copper sulphate crystals of the penta-hydrate (CuSO4.5H2O). If you continue to heat these blue crystals, they will turn white in colour as you drive off the water of hydration. CuSO4.5H2O(s)(Blue) ==heat==> CuSO4(s)(white) + 5H2O(g) The analogy of hydration is like holding a ball in your hand. Your hand is the copper sulphate, and the ball is the water. Open your hand (heat) and the ball falls away(water is released). Your hand and the ball remain separate objects (NOT combined). Similarly the copper sulphate and the water remain separate molecules (NOT combined). It's just that the one is held (in the crystal lattice), by the other.,
Yes, it is true.
Indoor the temperature is higher.
Eventually if heated long enough (and hot enough) all the water would either eat the world or MELT (turning into steam), leaving behind nothing but solid salt behind. This is one way that you can remove salt from sea water in fact.
When water is heated a physical change may take place. The water may evaporate and become water vapor, but the chemical makeup of the water (H2O) will not change.