STRAIGHTERLINE CHEMISTRY FINAL LATEST 2024 –
2025/ ACTUAL EXAM QUESTIONS AND CORRECT
VERIFIED ANSWERS/ GRADED A+
What is the term used for findings that are summarized based on a pattern or trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction - Correct Answer - a. Law
What is the vapor pressure above a beaker containing a solution of NaCl that is made
up of 250ml of water and 12g of NaCl?
a. 10.3 mmHg
b. 23.4 mmHg
c. 35.8 mmHg
d. 63.2 mmHg - Correct Answer - b. 23.4 mmHg
Plants use up copious amounts of which alkali metal, preventing most of it from being
washed out to sea?
a. lithium
b. sodium
c. potassium
d. rubidium - Correct Answer - c. potassium
pg. 1
,Which of the following isotopes is likely to be the most stable?
Select one:
a. F-21
b. Kr-77
c. Po-210
d. Sn-50 - Correct Answer - d. Sn-50
Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by
showing that
a. atoms are, in fact, not electrically neutral.
b. the atom contains neutrons.
c. positive matter is concentrated in the central core.
d. electrons are actually greater in mass than protons. - Correct Answer - c. positive
matter is concentrated in the central core.
What is the reducing agent in the following equation?
Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g)
a. Mg
b. HCl
c. H2
d. MgCl2 - Correct Answer - A. Mg
Which of the following is a tentative explanation for a set of observations?
Select one:
a. Law
b. Hypothesis
c. Theory
pg. 2
,d. Phenomena
e. Prediction - Correct Answer - b. Hypothesis
If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent - Correct Answer - c. Homogeneous mixture
A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume
will it occupy if the pressure is increased to 894 torr at constant temperature?
Select one:
a. 22.3 L
b. 31.2 L
c. 44.9 L
d. 112 L
e. 380 L - Correct Answer - b. 31.2 L
If the atmospheric pressure in Denver is 0.8800 atm, what is this pressure expressed in
mmHg? (1 atm = 101,325 Pa = 760 torr, 1 torr = 1 mmHg)?
Select one:
a. 151.5 mmHg
b. 1.16 × 10-3 mmHg
c. 863.6 mmHg
d. 8.92 × 104 mmHg
e. 668.8 mmHg - Correct Answer - e. 668.8 mmHg
pg. 3
, What are the conditions of STP?
Select one:
a. 0 K and 1 atm
b. 273.15 K and 760 torr
c. 0°C and 760 atm
d. 273.15°C and 760 torr
e. 0°C and 1 torr - Correct Answer - b. 273.15 K and 760 torr
In the van der Waals equation, the constant a is a constant that is part of a correction
factor for _________.
Select one:
a. the volume of the gas
b. the temperature of the gas
c. the pressure of the gas
d. the ideal gas constant - Correct Answer - c. the pressure of the gas
Which substance will exhibit hydrogen bonding between molecules?
Select one:
a. (CH3)3N
b. CH3-O-CH3
c. CH3CH2-OH
d. CH3CH2-F
e. HI - Correct Answer - c. CH3CH2-OH
Which of the following statements is true?
Select one:
a. The higher the viscosity, the faster a liquid flows.
b. The viscosity increases with increasing temperature.
pg. 4
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