This depends on the metal; nickel chloride solution is green.
A runner bean changes from green to a darker shade of green as it ripens.
Andrade's indicator is typically green in color. It is used in organic chemistry to test for the presence of unsaturation in a compound by changing color when it reacts with the compound in question.
Blue-Green
They contain chloroplasts which are green in colour.
Adding a green dye or mixing blue and yellow liquids can turn a liquid green.
it changes to green
There may be a misunderstanding. When an acid reacts with a metal, the metal usually undergoes a displacement reaction to form a salt and hydrogen gas. The color change to green may be due to impurities in either the acid or the metal, but it is not a typical result of the reaction between an acid and a metal.
Green - even though the liquid inside is clear colour.
No, its when iron reacts with O2 and changes its color to blueish green
iodine solution
blue-pinky colour.
A runner bean changes from green to a darker shade of green as it ripens.
Garlic turns green when it reacts with acids or sulfur compounds, causing a chemical reaction that changes its color.
red
it changes from green to a grey-black colour. (this applies to mycelium of bread mould)
If the moon ever changes colour, it is due entirely to the colour of dust high in the atmosphere.
Potassium dichromate is orange and when it reacts with ethanol which is a primary alcohol it is going to oxidise it to form aldehyde which is colorless. so the color change is from Orange to Colorless. :)