Echinoderms are headless, brainless and hearless, Yet they are placed at the top of invertebrates because of presence of

Echinoderms are headless, brainless and heartless, Yet they are placed at the top of invertebrates because of presence of

Echinoderms are headless, brainless and heartless, Yet they are placed at the top of invertebrates because of presence of

Echinoderms are heartless , brainless , headless , yet from evolutionary point of view , they have been placed on the top of the invertebrate phyla because of

Echinoderms are considered to be the most evolved invertebrates because they

Ozone is a toxic gas, yet its presence is essential in the atmosphere because :

Hemichordates have now been placed with the non-chordates, close to echinoderms, because

Aldehydes and ketones undergo reactions due to the presence of alpha -hydrogen atom. Write the name of the reaction of aldehyde which takes place only because of the presence of alpha -hydrogen atom.

Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution. In the process of acylation, R-overset(O)overset(||)C- group is introduced to the ring. Compounds having ( + mesomeric groups) like -NH_(2) do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction. Predict whether the following statements are ture or false: Diphenyl methane is obtained when benzene is treated with dichloro methane is presence of anhydrous AlCl_(3) : (a) True (b) False