Question 6 Plastic bottles for 'fizzy drinks' are made from a polymer with the following structure.
H
Х
The ability of the polymer to prevent escape of carbon dioxide through the wall of the bottle
depends on the ability of the group X to form hydrogen bonds with the carbon dioxide in the drink.
Which group X best prevents loss of carbon dioxide?
А СІ
B CN
с сосн.
DOH

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.

the answer is option a.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.