railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Chemistry

पेट्रोलची गुणवत्ता खालीलप्रमाणे व्यक्त केली जाते

1
सिटेनांक
2
सुवर्णांक
3
ऑक्टेनांक
4
अनलेडेड जोड संयुगे
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