If you are to measure 55 ul of a liquid for an experiment, which pipette should you use and what value should be displayed on its window?
select one:
a. p20: 550
b. p200: 055
c. p20: 055
d. p200: 550
e. p1000: 055

Explanation:

1. Type of pipette  

The three most common types of micropipette are shown in the table below.  

2. Window  

The window on a P200 micropipette shows three digits.  

The first digit is hundreds, the second is tens, and the third is units of microlitres.  

A measurement of 55 µL will display as 055.  

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 answer to your question is c