Chemistry Semester 2 Exam 10th Grade
Questions And Answers 100% Pass.
VSEPR theory is a model for predicting
a. the strength of metallic bonds.
b. the shape of molecules.
c. lattice energy values.
d. ionization energy. - answerb
Use VSEPR theory to predict the shape of the hydrogen chloride ...
VSEPR theory is a model for predicting
a. the strength of metallic bonds.
b. the shape of molecules.
c. lattice energy values.
d. ionization energy. - answer✔b
Use VSEPR theory to predict the shape of the hydrogen chloride molecule, HCl.
a. tetrahedral
b. linear
c. bent
d. trigonal-planar - answer✔b
Four hybrid sp3 orbitals are formed from
a. two s orbitals and two p orbitals.
b. an s orbital and a p orbital.
c. three s orbitals and one p orbital.
d. one s orbital and three p orbitals. - answer✔d
Compared with molecular bonds, the strength of intermolecular forces is
a. weaker.
b. stronger.
c. about the same.
d. too variable to compare. - answer✔a
A polar molecule contains
a. ions.
b. a region of positive charge and a region of negative charge.
c. only London forces.
d. no bonds. - answer✔b
A chemical formula includes the symbols of the elements in the compound and subscripts that
indicate
a. atomic mass of each element.
b. number of atoms or ions of each element that are combined in the compound.
c. formula mass.
d. charges on the elements or ions. - answer✔b
How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF4?
a. 1
b. 2
c. 4
d. 5 - answer✔c
What is the formula for the compound formed by calcium ions and chloride ions?
a. CaCl
b. Ca2Cl
c. CaCl3
d. CaCl2 - answer✔d
What is the formula for barium hydroxide?
a. BaOH
b. BaOH2
c. Ba(OH)2
d. Ba(OH) - answer✔c
Name the compound KClO3.
a. potassium chloride
b. potassium trioxychlorite
c. potassium chlorate
d. hypochlorite - answer✔c
Name the compound Fe(NO3)2.
a. iron(II) nitrate
b. iron(II) nitrite
c. iron(III) nitrate
d. iron(III) nitride - answer✔a
Name the compound Al2S3.
a. aluminum sulfate
b. aluminum sulfur
c. aluminum(II) sulfate
d. aluminum sulfide - answer✔d
Name the compound N2O3.
a. dinitrogen oxide
b. nitrogen trioxide
c. nitric oxide
d. dinitrogen trioxide - answer✔d
What is the formula for dinitrogen trioxide?
a. Ni2O3
b. NO3
c. N2O6
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