Sem 1 Exam Review 2 Question Preview (ID: 35041)
Semester 1 Review 2.
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When water goes from liquid to solid -
a) freezing
b) sublimation
c) evaporation
d) melting
What two elements are found in covalent compounds?
a) nonmetals and nonmetals
b) metals and metals
c) metals and nonmetals
d) metals and metalloids
What two elements are found in ionic compounds?
a) metals and nonmetals
b) metals and metals
c) metals and metalloids
d) nonmetals and nonmetals
Which of the following is a covalent compound
a) CO2
b) Fe2O3
c) K2O
d) Li2O
Near the ceiling of a room the air is warmer. The warm air rises because of -
a) convection
b) conduction
c) electricity
d) radiation
Which scientist used gold foil to find the structure of an atom?
a) Rutherford
b) Bohr
c) Thomson
d) Chadwick
Which of the following are true about the modern model?
a) electrons are in a 3D orbit
b) the atoms is made of imaginary space
c) the atom is a solid ball
d) electrons are in a set orbit like planets around the sun
Which of these is neither an acid or a base?
a) pH 7
b) pH 1
c) pH 3
d) pH 11
Which is the strongest base?
a) pH 14
b) pH 3
c) pH 7
d) pH 11
Which equation is not balanced?
a) H2 + O2 - 2H2O
b) 2 Na + Cl2 - 2NaCl
c) CaCO3 - CaO + CO2
d) Fe2O3 + H2 - 2Fe + 3H2O
Which of the following is an exothermic equation?
a) AB - A + B + energy
b) A + B + energy - AB
c) energy
d) solid
Which subatomic particles has equal mass?
a) proton and neutrons
b) protons and electrons
c) electrons and neutrons
d) protons and nucleus
What is the product? MgCO3+ 2HCl - MgCl2 + H2CO3
a) MgCl2 + H2CO3
b) MgCO3 + 2HCl
c) MgCl
d) HCl
Which element will lose valance electrons?
a) Na
b) O
c) F
d) Ne
What happens when water freezes?
a) the molecules slow down until the bond together
b) The molecules speed up escape phase
c) molecules squeeze together
d) form irregular shape
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