A scientist follows this procedure to test whether plants have been performing photosynthesis.

Place Plant X in a dark closet and Plant Y on a sunny windowsill.
Wait several days, then remove a leaf from each plant.
Boil leaves in alcohol to remove the chlorophyll.
Add a chemical indicator that detects sugars. (Dark purple = sugars are present; dark orange = sugars are not present)
What results will the scientist most likely obtain when placing drops of the indicator on the leaves?

Plant X: dark purple
Plant Y: dark purple
Plant X: dark orange
Plant Y: dark purple
Plant X: dark orange
Plant Y: dark orange
Plant X: dark purple
Plant Y: dark orange

plant X was placed in dark so due to the absence of sunlight it didn't perform photosynthesis and plant Y was placed on a sunny windowsill so it perform photosynthesis.

as we know that during photosynthesis, sunlight energy is used to covert carbon dioxide gas and water into oxygen gas and a sugar called glucose. so, in plant x sugars are not present and in plant Y sugars are present.

that's why result is Plant X: dark orange

Plant Y: dark purple.