STRAIGHTERLINE CHEMISTRY 2024 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
What is the term used for findings that are summarized based on a pattern or trend?
• Law
• Hypothesis
• Theory
• Phenomena
• Prediction - Answer a. Law
Which of the following is a tentative explanation for a set of
observations?Select one:
• Law
• Hypothesis
• Theory
• Phenomena
• Prediction - Answer b. Hypothesis
If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
Select one:
• Solute
• Compound
• Homogeneous mixture
• Heterogeneous mixture
• Solvent - Answer c. Homogeneous mixture
Which of the following does not have a uniform composition throughout?
Select one:
• Element
• Compound
• Homogeneous mixture
• Heterogeneous mixture
• Solvent - Answer d. Heterogeneous mixture
Which one of these represents a physical
change?Select one:
,• Water, when heated, forms steam.
• Bleach turns hair yellow.
• Sugar, when heated, becomes brown.
• Milk turns sour.
• Apples, when exposed to air, turn brown. - Answer a. Water, when heated,
formssteam.
How many micrograms are in 65.3
kg?Select one:
a. 0.653 μg
b. 6.53 × 107 μg
c. 6.53 × 104 μg
d. 6.53 × 10-8 μg
e. 6.53 × 1010 μg - Answer e. 6.53 × 1010 μg
A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0
millimeters (depth). What is the volume of the smart phone in cubic centimeters? (1 in =
2.54 cm) Select one:
a. 58 cm3
b. 1.7 x 105 cm3
• 90 cm3
• 3.4 cm3
• 34 cm3 - Answer a. 58 cm3
Given that 1 inch = 2.54 cm, 1.00 cm3 is equal
toSelect one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 - Answer e. 0.0610 in3
What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-
12atom?
Select one:
• Isotope number
• Mass number
• Mass-to-charge ratio
• Atomic number
• Atomic mass unit - Answer e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass number is 208?
Select one:
,a. 82
b. 126
c. 208
d. 290
e. none of them - Answer b. 126
Which of these elements is chemically similar to
magnesium?Select one:
• Sulfur
• Calcium
• Iron
• Nickel
• Potassium - Answer b. Calcium
C(graphite) and C(diamond) are examples
of:
Select one:
• isotopes of carbon.
• allotropes of carbon.
• the law of definite proportions.
• different carbon ions. - Answer b. allotropes of carbon.
The 80Br- ion hasSelect one:
• 45 protons, 35 neutrons, 45 electrons.
• 35 protons, 45 neutrons, 34 electrons.
• 35 protons, 45 neutrons, 36 electrons.
• 45 protons, 35 neutrons, 46 electrons.
• 35 protons, 45 neutrons, 46 electrons. - Answer e. 35 protons, 45 neutrons,
46electrons.
The formula for sodium sulfide
isSelect one:
• NaS
• K2S
• NaS2
• Na2S
• SeS - Answer d. Na2S
Which one of the following formulas of ionic compounds is the least likely to be correct?
Select one:
• NH4Cl
, • Ba(OH)2
• Na2SO4
• Ca2NO3
• Cu(CN)2 - Answer d.
Ca2NO3What is the name of
ClO - ion?
Select one:
• hypochlorite
• chlorate
• chlorite
• perchlorate
• perchlorite - Answer a. hypochlorite
Which of the following is a molecular formula for a compound with an empirical
formulaof CH?
Select one:
• C2H6
• C3H9
• C4H10
• C6H6
• None of the answers is correct. - Answer d.
C6H6Which is the correct electron configuration
for gold?
Select one:
a. [Xe]4f145d96s2
b. [Xe]4f145d106s2
c. [Xe]4f135d106s2
d. [Xe]4f145d106s1
e. None of the electron configurations is correct. - Answer d. [Xe]4f145d106s1
A(n) is a point at which a standing wave has zero
amplitude.Select one:
• crevice
• node
• pit
• burrow
• orbital - Answer b. node
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
What is the term used for findings that are summarized based on a pattern or trend?
• Law
• Hypothesis
• Theory
• Phenomena
• Prediction - Answer a. Law
Which of the following is a tentative explanation for a set of
observations?Select one:
• Law
• Hypothesis
• Theory
• Phenomena
• Prediction - Answer b. Hypothesis
If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
Select one:
• Solute
• Compound
• Homogeneous mixture
• Heterogeneous mixture
• Solvent - Answer c. Homogeneous mixture
Which of the following does not have a uniform composition throughout?
Select one:
• Element
• Compound
• Homogeneous mixture
• Heterogeneous mixture
• Solvent - Answer d. Heterogeneous mixture
Which one of these represents a physical
change?Select one:
,• Water, when heated, forms steam.
• Bleach turns hair yellow.
• Sugar, when heated, becomes brown.
• Milk turns sour.
• Apples, when exposed to air, turn brown. - Answer a. Water, when heated,
formssteam.
How many micrograms are in 65.3
kg?Select one:
a. 0.653 μg
b. 6.53 × 107 μg
c. 6.53 × 104 μg
d. 6.53 × 10-8 μg
e. 6.53 × 1010 μg - Answer e. 6.53 × 1010 μg
A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0
millimeters (depth). What is the volume of the smart phone in cubic centimeters? (1 in =
2.54 cm) Select one:
a. 58 cm3
b. 1.7 x 105 cm3
• 90 cm3
• 3.4 cm3
• 34 cm3 - Answer a. 58 cm3
Given that 1 inch = 2.54 cm, 1.00 cm3 is equal
toSelect one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 - Answer e. 0.0610 in3
What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-
12atom?
Select one:
• Isotope number
• Mass number
• Mass-to-charge ratio
• Atomic number
• Atomic mass unit - Answer e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass number is 208?
Select one:
,a. 82
b. 126
c. 208
d. 290
e. none of them - Answer b. 126
Which of these elements is chemically similar to
magnesium?Select one:
• Sulfur
• Calcium
• Iron
• Nickel
• Potassium - Answer b. Calcium
C(graphite) and C(diamond) are examples
of:
Select one:
• isotopes of carbon.
• allotropes of carbon.
• the law of definite proportions.
• different carbon ions. - Answer b. allotropes of carbon.
The 80Br- ion hasSelect one:
• 45 protons, 35 neutrons, 45 electrons.
• 35 protons, 45 neutrons, 34 electrons.
• 35 protons, 45 neutrons, 36 electrons.
• 45 protons, 35 neutrons, 46 electrons.
• 35 protons, 45 neutrons, 46 electrons. - Answer e. 35 protons, 45 neutrons,
46electrons.
The formula for sodium sulfide
isSelect one:
• NaS
• K2S
• NaS2
• Na2S
• SeS - Answer d. Na2S
Which one of the following formulas of ionic compounds is the least likely to be correct?
Select one:
• NH4Cl
, • Ba(OH)2
• Na2SO4
• Ca2NO3
• Cu(CN)2 - Answer d.
Ca2NO3What is the name of
ClO - ion?
Select one:
• hypochlorite
• chlorate
• chlorite
• perchlorate
• perchlorite - Answer a. hypochlorite
Which of the following is a molecular formula for a compound with an empirical
formulaof CH?
Select one:
• C2H6
• C3H9
• C4H10
• C6H6
• None of the answers is correct. - Answer d.
C6H6Which is the correct electron configuration
for gold?
Select one:
a. [Xe]4f145d96s2
b. [Xe]4f145d106s2
c. [Xe]4f135d106s2
d. [Xe]4f145d106s1
e. None of the electron configurations is correct. - Answer d. [Xe]4f145d106s1
A(n) is a point at which a standing wave has zero
amplitude.Select one:
• crevice
• node
• pit
• burrow
• orbital - Answer b. node
