This is because butterfly caterpillars are host specific. Plant-wise, the caterpillars of some butterfly species like asters, black-eyed Susan, clover, lupines, milkweed, sedum or violets. Aspen, birch, cherry, hackberry, oak or willow trees make caterpillars of other butterfly species equally happy.
each Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.ach Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.
(2) S-Br bond is the most polar. GROUP D: Si-Cl bond is the most polar. GROUP -E : because of the presence of hydrogen,the P-block elements take up a negative charge and act as an anion. thus according to the rule , Sn-H bond is the most polar. GROUP - F : here the P-Block elements act as a cation. So smaller the size ,grater the polarity.as aluminium is the smallest among the given, Al-Br bond is the most polar. Please refer to the periodic table for any doubts in the position of the elements. muruganandam p Â· 10 years ago