Unit 1 quiz reviews

Question 1

How does a scientific theory differ from a scientific hypothesis?

Answer 1

A theory is an explanation for a very general phenomenon or observation, whilst hypotheses treat more specific observations

Question 2

Why is the Tm (melting point) of ICl (27.2°C) higher than that of Br2 (-7.2°C), even though the molecules of both compounds have the same number of electrons?

Answer 2

ICl molecules are more polar

Question 3

One of the reasons that solid CuSO4 dissolves in water is

Answer 3

There exist ion-dipole forces between the ions and the water molecules.

Question 4

The vapour pressure of a liquid increases exponentially with increasing temperature because

Answer 4

As temperature increases, the fraction of high energy molecules increases much faster than the average total energy of the molecules

Question 5

Which of the following is NOT true with respect to an oxidizing agent (O.A.)?

Answer 5

The oxidation number of the O.A. always increases