Question

when hydrogen gas burn in air the change is chemical. Give 2 reason to support this assertion. ​

Answer 1

Heya❤️

when hydrogen burns in air,the change is chemical.give two reasons to support this assertion. When hydrogen burns in air, it combines with atmospheric oxygen to form water. Since hydrogen and oxygen are undergoing a chemical change to become chemically bonded together producing H2O the change is chemical in nature

Thanku ❤️

Answer 2

Answer:

chemical change occurs when :-

• when a gas is produced
• when precipitate is formed
• change in color
• change in state
• change in temperature

__________________

when hydrogen burns in air ,the. a chemical reaction tooks place ,

H2 + O2 => H2O2

hydrogen peroxide is formed

__________

or in other condition

2H2 + O2 =>2H2O

hydrogen oxide or water is formed

____________________❤❤

here ,a new substance formed ,change in temperature and change in state occurs

so it is a chemical reaction