What is unique about pluto's orbit around the sun?
revolves opposite to all other planets
inclined more than other planets
most circular orbit
most elliptical orbit

most elliptical orbit

Explanation:                    

Pluto is a dwarf planet which lies beyond Neptune. It is the first object in the Kuiper belt which was found by Clyde Tombaugh in 1930. Pluto's orbit is 17° tilted and it does not lie in the same plane as other planets revolve around Sun. It takes 248 years for Pluto to complete one orbit. Its orbit is most elliptical in nature.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.