1. Butanal: Butanal is an aldehyde with 4 carbon atoms. The functional group is -CHO. [ CH_3-CH_2-CH_2-CHO ]
2. Pent-2-yne: Pent-2-yne is an alkyne with 5 carbon atoms and a triple bond starting at the second carbon atom. [ CH_3-Cequiv C-CH_2-CH_3 ]
3. Isomer of n-butane (Iso-butane / 2-Methylpropane): n-butane is a straight chain of 4 carbons. Its only structural isomer is a branched chain where 3 carbons form the main chain and 1 carbon is a methyl branch. [ CH_3-CH(CH_3)-CH_3 ]
Which of the following element pairs will form an ionic bond? 
A hydrocarbon X undergoes the reaction under suitable conditions as shown below. 
(a) Give the IUPAC name for the following organic compounds: 
नीचे दिए गए चित्र को ध्यान से देखिए और चित्र को आधार बनाकर कोई लेख, घटना अथवा कहानी लिखिए जिसका सीधा व स्पष्ट संबंध चित्र से होना चाहिए। 