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

पुढीलपैकी कशाला 'सिनगॅस' म्हणून ओळखले जाते?  

1
CO2 + H2 
2
CO + H2O
3
CO + H2
4
CO2 + H2O

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