|What is the fundamental element of all organic compounds?
|In all bio-compounds the most necessary fundamental element is –
|Which sets of elements was primarily responsible for the origin of life on the Earth?
|Carbon, Hydrogen, Nitrogen
|A hydrocarbon in which two carbon atoms are joined by a double bond is called an –
|Which gases is used in cigarette lighters?
|Which gases had caused the Bhopal Gas Tragedy?
|When did the Bhopal Gas tragedy happen?
|2-3 Dec. 1984
|From the decomposition of which of the following printing ink is formed –
|Which chemicals helps in fruit ripening?
|Calcium carbide is used for artificial ripening of green fruits because it produces –
|Which gas mixtures is used in welding gas?
|Oxygen and Acetylene
|Numbers of sigma and pi bonds in benzene are –