please help me finish this
I really need to graduate
best answer ten points
thank you so much!=]]
1: The Frasch process is used to mine
lead
potassium
sulfur
uranium
2: The most striking physical characteristic of hydrogen sulfide is its
color
density
odor
solubility in water
3: The formula for hydrosulfuric acid is
H2S
H2SO2
H2SO3
H2SO4
4: If the volume of sulfuric acid in an uncovered beaker increased gradually during a perios of several weeks, the increase was probably due to the absorption of
carbon dioxide
nitrogen
oxygen
water
5: The most stable form of sulfur at room temperatre is
amorphous
monoclinic
prismatic
rhombic
6: Sulfuric acid is used in the preparation of other acids because it
is an oxidizing agent
is dense
has a high boiling point
is a dehydrating agent
7: The acid contained in storage batteries is
acetic
hydrochloric
nitric
sulfuric
8: Hydrogen sulfide forms a white precipitate when passes into a solution of
Cd(NO3)2
Pb(NO3)2
CuCl2
ZnSO4
9: A sulfur compound that will readily dissolve sulfur is
H2SO4
SO2
CS2
H2S
10: SUperheated water heated to 167oC is used in the Frasch process to
clean the pipes
clean the sulfur
dissolve the sulfur
melt the sulfur
11: A catalytic agent used in the contact process for the manufacture of H2SO4 is
Ni
MnO2
Pt
ZnO
12: When sulfur reacts with oxygen, heat is
neither liberated nor absorbed
absorbed
liberated
sometimes liberated and sometimes absorbed
13: A sulfur compound used as a refrigerant is
hydrogen sulfide
sulfuric acid
sulfur dioxide
sulfur trioxide
14: The sulfur compound used to preserve food is
H2S
SO2
SO3
H2SO4
15: The chemist finds H2S useful in
preparing sulfuric acid
testing for metals
bleaching
refining petroleum
16: Sulfur and oxygen both have six electrons in their outer orbits. One of the valences for sulfur is therefore
-4
-1
-2
2
17: Rhombic sulfur may be prepared by
slow cooling of melted sulfur
rapid cooling of boiling sulfur
evaporation from a sulfur solution in carbon disulfide
sublimation
18: Sulfur dioxide is used in commercial refrigerators because the gas
is easily liquified
dissolves in water
is cold
decolorizes KMnO4
