Chemistry
Pre-DP course 1
Practice test 2012
MG/MAT
Answer no more than 6 of the following 7 questions.
1.
2.
3.
Are the following statements true or false? Explain each answer.
a)
b)
c)
d)
e)
f)
earth-alkalimetals form ions with the charge +1
all elements in period 2 are non-metals
elements in group 8 are chemically inactive
the formula for calcium oxide is CaO2
steel is a heterogenous mixture
oxygen is the most electronegative element.
a)
b)
c)
Do sulfur and chlorine form an ionic compound? Explain.
Draw the structural formula of 2-methyl-pentanol
Give the name of the element with the atomic number 25
and state its relative atomic mass.
and
(6 × 1p.)
(3 × 2p.)
a)
What do
have in common? How do they differ?
b)
Proteins are the main building blocks of human beings. What are
proteins made of? Which two functional groups do all these have in
common?
c)
Draw the Lewis structures for oxygen and strontium.
(3 × 2p.)
4.
a)
Place the following substances in the correct order according to their
melting points. Begin with the lowest. Explain your answer.
Al
b)
CH3CH2CH3
H2O
Identify the functional groups in vanillin:
(2 × 3p.)
5.
Chemical bonds – what types of bonds are there and how do they affect the properties of a
substance?
(6 p.)
6.
Name the following compounds:
a)
b)
c)
(6 p.)
7.
Fats are made up of a particular alcohol with three acids linked to the alcohol. What is
the name of the alcohol? Is it a primary, secondary or tertiary alcohol? Also describe
what the difference between a saturated and an unsaturated fat is. In practice, how can
you define if you have a saturated or an unsaturated fat?
(6 p.)