Question

Q6: Why some materials lose their shine and appear dull?.........?

Answer 1

$\huge \red {\underline {HAYE\:MATE}}$

$\huge \red {\mathbb {ANSWER}}$

Some materials often lose their shine and appear dull because of the action of air and moisture on them.

$\huge \blue {\mathbb {THANKS}}$

$\huge \green {FOllOW\:ME}$

$\huge \purple {\mathbb {SINGLE\:STAR}}$

Answer 2

Answer:

Because the are non-loustrous.....

For example graphite..