Yes, the flour holds chemical organisms that multiply and "feed" on water. The flour multiplies and has a chemical reaction.
No. They simply produce a heterogenous mixture.
it desolves in the water
Not a chemical reaction but the formation of hydrogen bromide (or hydrobromic acid, HBr) water solution.
no reaction take place between copper and water. so there is no blance equation.
chemical reaction between copper oxide and glucose
No. It is a physical process, so it technically isn't a reaction.
No chemical reaction.
There is no chemical reaction between flour and vinegar. However it will produce an acidic paste dough that will look not much different from an ordinary flour and water paste dough.
it desolves in the water
Not a chemical reaction but the formation of hydrogen bromide (or hydrobromic acid, HBr) water solution.
no reaction take place between copper and water. so there is no blance equation.
chemical reaction between copper oxide and glucose
No. It is a physical process, so it technically isn't a reaction.
This is a neutralization reaction; the products are a salt and water.
it cant decolourise
The reaction is:2 Na + 2 H2O = 2 NaOH + H2
Neutralization is a chemical reaction between an acid and a base; the products are a salt and water.
This reaction is called neutralization.