Chemistry Final Exam Study Material with Solved Questions

CHEMISTRY
FINAL EXAM
Student Name
[Pick the date]

Question 1
The temperature and pressure data for the fixed volume of gas is highlighted below:
Missing data =?
For the fixed volume, Gay- Lussac’s law would be used.
P=KT
Where,
k =slope=2.608
y−intercept =−13.977
P=KT −13.977
P=2.608 T −13.977
T =150 ° C=150+ 273=423 K
P= (2.608∗423 )−13.977
P=1089.22 mmHg
1

Question 2
It is apparent that the solution of KNO3 is a clear liquid. We will first leave the liquid to stand for
some time. We will observe whether the crystals are formed or not in the solution. If crystals are
formed, it means the solution is supersaturated. Further, if no crystals are formed, then we will
add some crystals of KNO3 in the solution. If the crystals are dissolved in the solution, then the
solution would be unsaturated. If the crystals do not dissolve, then the solution is saturated.
Question 3
Gasoline does not dissolve in water because water is a polar molecule while gasoline is non-
polar molecule. If one wants to dissolve gasoline in water, then it is essential that gasoline is in
polar form.
Question 4
Perspiration in the skin is a process by which the skin would remain cool due to the evaporation
of the sweat. Thermal energy would be received from the environment and this thermal energy
would transform the liquid (Sweat) into gas. It means the skin gets cooled and relaxed.
Question 5
The vapour pressure of the water mainly depends on the temperature of the water and the purity
of water. If the given two jars are at the same temperature and the water is having same level of
purity, then the vapour pressure in the given two jars would be the same.
Question 6
It is apparent that hydrogen is slightly positive and oxygen is slightly negative. Hence, oxygen
and hydrogen would combine together to form hydrogen bonds. When, water is allowed to freeze
2