answer: option (b) is the correct answer.
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.
c. because step up transformer steps up the input voltage i.e increases the input voltage
the number of turns are greater on the secondary side of step up transformer
transformer does not handle dc current
no podemos ver la
no te podemos ayudar: /
"record the time to complete a chemical reaction" would most likely be part of a lab procedure.