Exam Q 27

Question 1

Both CS^2 and CCl^4 are colourless liquids at room temperature:
Predict the type of bond formed between carbon and chlorine atoms in a CCI^4 molecule

Answer 1

polar covalent

Question 2

Define electronegativity

Answer 2

Electronegativity is the relative attraction that an atom in a molecule has for the shared pair of electrons in a covalent bond

Question 3

What is the valency of carbon in CCl^4

Answer 3

4

Question 4

State and account for the shape of CCl^4 molecule

Answer 4

It has four bond pairs and no lone pairs so it will have a tetrahedral shape

Question 5

Draw a dot and cross diagram to show the arrangement of all the valence shell electrons in a CS^2 molecule

Answer 5

Draw: crabon in the middle with 4 x’s and draw a S on each side with two lone pairs each and two electrons.
Have them touching to show that they are covalent bonds sharing electrons and switch the 4 carbon electrons with the 2 electrons on both Sulfur atoms