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Questions Bank (1496148 total)
Which of the following equations represents an acid-base neutralization reaction?
Ba(OH)
2
+ Na
2
SO
4
---> BaSO
4
+ 2NaOH
0%
a,
b and c are correct
100%
HNO
3
+ KOH ---> KNO
3
+H
2
O
0%
neither
a, b nor c
0%
H
2
SO
4
+ Zn ---> ZnS0
4
+ H
2
0%
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Hydrazine, was first used as a rocket fuel in World War II, it is also a product of the reaction between ammonia and bleach. Balance the equation for the reaction.
a
NH
3
(aq) +
b
OCL
-
(aq) --->
c
N
2
H
4
(l) +
d
Cl
-
(aq)
+
e
H
2
O(l)
a = 2, b = 1, c = 2, d = 1, e = 2
0%
a = 4, b = 3, c = 2, d = 3, e = 2
0%
a = 4, b = 3, c = 1, d = 3, e = 1
0%
a = 2, b = 2, c = 1, d = 2, e = 2
100%
a = 2, b = 1, c = 1, d = 1, e = 1
0%
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Which of the following statements about covalent and ionic bonds is correct?
Covalent bonds usually involve two nonmetals and ionic bonds usually involve two metals.
0%
Covalent bonds usually involve two nonmetals and ionic bonds usually involve a metal and a nonmetal.
100%
Covalent bonds usually involve a metal and a nonmetal and ionic bonds usually involve two nonmetals.
0%
Covalent bonds usually involve two metals and ionic bonds usually involve a metal and a nonmetal.
0%
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Neutrophils and lymphocytes are types of _____.
white blood cells
100%
plasma cells
0%
platelets
0%
red blood cells
0%
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What type of orbital is designated
4d
100%
4p
0%
2f
0%
4s
0%
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Which of the following concepts of species is most compatible with the goals of cladistic systematics?
Phonetic
0%
Evolutionary
100%
Typological
0%
Biological
0%
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The iris controls the size of the
pupil
100%
sclera
0%
retina
0%
cornea
0%
choroid
0%
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According to the binomial system of nomenclature, the "
aegypti
" in
Aedes aegypti
refers to the ________.
species name
0%
genus
0%
family
0%
specific epithet
0%
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The scientific name of the copperhead is
Agkistrodon contortrix
. Therefore,
It belongs to the genus
Agkistrodon
100%
None of the choices are correct.
0%
It belongs to the species
Agkistrodon
0%
It is species
Agkistrodon,
subspecies
contortrix.
0%
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Animals that have both male and female organs in the same individual are called
monoecious
100%
parthenogenetic
0%
dioecious
0%
bisexual
0%
asexual
0%
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