The colour of chillies at the time of ripening changes from green to red.
give reasons​

Peppers can be eaten at any point of ripeness, but the color change in ripening peppers is caused by the degradation of chlorophyll, which occurs at the same time as the seeds mature.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds