Question

Which change is most likely to occur when a molecule of H2 and a molecule of I2 collide with proper orientation and sufficient energy? 1. a chemical change, because a compound is formed 2. a chemical change, because an element is formed 3. a physical change, because a compound is formed 4. a physical change, because an element is formed

Answer 1

The collision of the molecules between the hydrogen molecule or H2, and an iodine molecule or I2, provided there would be a sufficient energy is that the system would eventually undergo a chemical change wherein a new chemical compound would be formed from these two molecules.

Answer 2

Answer : The correct option is, (1) a chemical change, because a compound is formed

Explanation :

Physical change : It is a change in which no new compound or substance is formed only changes in the phase.

Chemical change : It is a change in which a new compound or substance is formed and also some energy releases. There is no changes occurs in the phase.

When a molecule of
`H_2` and a molecule of
`I_2` collide with proper orientation and sufficient energy then the chemical changes occurs due to the formation of the new compound.

Hence, the correct option is, (1) a chemical change, because a compound is formed