Answer:
Non-Metals can be all three.
Answer:
(a) dew condensing on a leaf
(c) ice cream melting
Explanation:
The process which can be reversed by changing the temperature , i.e. , by increasing or decreasing the temperature , is called the <u>reversible process</u> .
From the question ,
- dew condensing on a leaf is a reversible process ,
As the water on the leaf can be changed to gaseous state by increasing the temperature .
The process of condensation and evaporation are reversible of each other .
The melted ice cream can be solidified again by reducing its temperature , hence , it is a reversible process .
- an egg turning hard when boiled and the batter cooking on a hot griddle
They both are irreversible process , and by changing the temperature , we can not get back the original substance .
Answer : The correct option is, (A)
because one of each is produced every time an
transfers from one water molecule to another.
Explanation :
As we know that, when the two water molecule combine to produced hydronium ion and hydroxide ion.
The balanced reaction will be:

Acid : It is a substance that donates hydrogen ion when dissolved in water.
Base : It is a substance that accepts hydrogen ion when dissolved in water.
From this we conclude that, the hydrogen ion are transferred from one water molecule to the another water molecule to form hydronium ion and hydroxide ion. In this reaction, one water molecule will act as a base and another water molecule will act as an acid.
Hence, the correct option is, (A)