railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Chemistry

पाण्याची दुष्फेनता खालीलप्रमाणे व्यक्त केली जाते:

1
मोल
2
ग्रॅमरेणुता
3
ppm
4
प्रसामान्यता
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