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Sem 1 Exam Review 2
Test Description: Semester 1 Review 2
Instructions: Answer all questions to get your test result.
1) When water goes from liquid to solid -
A
sublimation
B
melting
C
freezing
D
evaporation
2) What two elements are found in covalent compounds?
A
metals and metalloids
B
nonmetals and nonmetals
C
metals and nonmetals
D
metals and metals
3) What two elements are found in ionic compounds?
A
metals and metals
B
metals and metalloids
C
metals and nonmetals
D
nonmetals and nonmetals
4) Which of the following is a covalent compound
A
Li2O
B
CO2
C
K2O
D
Fe2O3
5) Near the ceiling of a room the air is warmer. The warm air rises because of -
A
radiation
B
electricity
C
conduction
D
convection
6) Which scientist used gold foil to find the structure of an atom?
A
Chadwick
B
Bohr
C
Thomson
D
Rutherford
7) Which of the following are true about the modern model?
A
the atoms is made of imaginary space
B
electrons are in a set orbit like planets around the sun
C
electrons are in a 3D orbit
D
the atom is a solid ball
8) Which of these is neither an acid or a base?
A
pH 11
B
pH 7
C
pH 1
D
pH 3
9) Which is the strongest base?
A
pH 11
B
pH 7
C
pH 14
D
pH 3
10) Which equation is not balanced?
A
2 Na + Cl2 - 2NaCl
B
Fe2O3 + H2 - 2Fe + 3H2O
C
H2 + O2 - 2H2O
D
CaCO3 - CaO + CO2
11) Which of the following is an exothermic equation?
A
A + B + energy - AB
B
energy
C
AB - A + B + energy
D
solid
12) Which subatomic particles has equal mass?
A
proton and neutrons
B
protons and nucleus
C
electrons and neutrons
D
protons and electrons
13) What is the product? MgCO3+ 2HCl - MgCl2 + H2CO3
A
HCl
B
MgCO3 + 2HCl
C
MgCl2 + H2CO3
D
MgCl
14) Which element will lose valance electrons?
A
O
B
Ne
C
Na
D
F
15) What happens when water freezes?
A
the molecules slow down until the bond together
B
molecules squeeze together
C
The molecules speed up escape phase
D
form irregular shape
*select an answer for all questions
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