CHEMISTRY
Quiz Bee
EASY Round
Question 1
In one of the procedures of an experiment, the group of
Ruff pounded a piece of metal until it is flattened into a
sheet. What property of metal is tested by the group of
Ruff?
a. Ductility
b. Malleability
c. Luminosity
d. Elasticity
Answer:
b. Malleability
Question 2
Argeleen listed the characteristics of diamond, graphite, charcoal
and buckminsterfullerene. They have the same chemical
composition and nearly the same chemical properties but they
differ in physical form and physical properties. How do you call
these substances with these characteristics?
a. Isotope
b. Isobar
c. allotrope
d. racemate
Answer:
c. allotrope
Question 3
Angelo was called by his Teacher to characterize a proton. Which
of the following would be an acceptable answer of Angelo?
a. Protons are involved during chemical reaction forming
various products
b. The highly reactive electrons are stabilized by the proton
particles.
c. Every atom is identified by the number of protons inside
its nucleus.
d. The mass of the atom is given by the total mass of
protons in the nucleus.
Answer:
c. Every atom is identified by the
number of protons inside its nucleus.
Question 4
Victor would like to select the electronic configuration of
an element that is classified as metal. Which of the
following is a CORRECT choice for Victor?
a.
b.
c.
d.
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s2 3p6 4s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2
Answer:
c. 1s2 2s2 2p6 3s2 3p6 4s2
Question 5
Which of the following is the reason why Noble gases cannot
accept any more electrons from other atoms?
a. The smaller atomic size of noble gases does not allow
added electrons in the atom.
b. Every electron outside their nuclei is paired from the
proton inside their nucleus.
c. There are no more rooms available to accommodate
electrons from other atom.
d. Noble gases have the lowest electronegativity value to
attract electron toward itself.
Answer:
c. There are no more rooms available to
accommodate electrons from other
atom.
Question 6
What explains the increase in atomic size as one goes
down a period within a family in the periodic table?
a. effective nuclear charge
b. shielding effect
c. increasing atomic number
d. added energy level
Answer:
d. added energy level
Question 7
Given the following elements in the Halogen group: F, Cl,
Br, I, which of these elements will have the highest
tendency to attract electrons towards itself?
a.
b.
c.
d.
F
Cl
Br
I
Answer:
a. F
Question 8
Which of the following shows the quark triplet
composition of a proton particle?
a.
b.
c.
d.
udd
uud
csu
cbu
Answer:
b. uud
Question 9
The group of Krystel reported that in the 3 samples of
sucrose (C12H22O11), Carbon is 42.11 %, Hydrogen is 6.43
% and Oxygen is 51.47 % by mass in the three samples.
This observation is consistent with the
_________________.
a. Law of Conservation of Mass
b. Law of Conservation of Energy
c. Law of Definite Proportion
d. Law of Multiple Proportion
Answer:
c. Law of Definite Proportion
Question 10
Which of the following bonds is considered the most
polar?
a.
b.
c.
d.
C–O
C–H
C–N
C–C
Answer:
a. C – O
End of
EASY
Round
AVERAGE Round
Question 1
2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. Where do you
Se
as
1s
34
find the MOST stable electrons and those with the
HIGHEST energy level?
a.
b.
c.
d.
electrons in 4p orbital
electrons in the 1s and 4p orbitals
electrons in 3d and 4p orbitals
electrons in 1s and 3d orbitals
Answer:
b. electrons in the 1s and 4p orbitals
Question 2
Jake would like to manipulate the electronic configuration
of Nitrogen to achieve a stable configuration. What should
be done by him to achieve his objective?
a.
b.
c.
d.
Remove 1 electron from Nitrogen.
Remove 3 electrons from Nitrogen.
Add 1 electrons to Nitrogen.
Add 3 electrons to Nitrogen.
Answer:
d. Add 3 electrons to Nitrogen.
Question 3
Which of the following is violated based on the following
electronic configuration?
1s2 2s2 2p6 3s3 3p6.
a.
b.
c.
d.
Aufbau Principle
Pauli’s Exclusion Principle
Hund’s Rule of Maximum Multiplicity
Octet Rule
Answer:
b. Pauli’s Exclusion Principle
Question 4
The electronic configuration of an element is 1s2 2s2 2p6
3s2 3p6 4s2 3d10 4p2. What is the period and family to
which this element belongs?
a.
b.
c.
d.
period 4, family II B
period 4, family IV A
period 3, family II A
period 3, family II B
Answer:
b. period 4, family IV A
Question 5
How many milliliters (mL) of a 0.610 M NaOH solution
are needed to neutralize 20.0 mL of a 0.245 M H2SO4
solution?
a.
b.
c.
d.
11.2 mL
13.4 mL
15.7 mL
16.1 mL
Answer:
d. 16.1 mL
Question 6
What is the oxidation number of Phosphorus in
Ca3(PO3)2 ?
a.
b.
c.
d.
1
3
5
7
Answer:
c. 5
Question 7
A mixture of 0.50 mol H2(g) and 0.50 mol N2(g) is introduced
into a 15.0 liter container having a pinhole leak at 30oC. After a
period of time, which of the following is TRUE?
a. The partial pressure of H2 exceeds that of N2 in the
container.
b. The partial pressure of N2 exceeds that of H2 in the
container.
c. The partial pressures of the two gases remain equal.
d. The partial pressures of both gases increase above their
initial values.
Answer:
c. The partial pressures of the two gases
remain equal.
Question 8
How many grams of water are contained in 75.0 grams of
a 6.10% aqueous solution
of K3PO4?
a.
b.
c.
d.
75.0 g
73.2 g
70.4 g
68.1 g
Answer:
c. 70.4 g
Question 9
A compound contains, by mass, 40.0% carbon, 6.71%
hydrogen, and 53.3% oxygen. A 0.320 mole sample of this
compound weighs 28.8 g.
The molecular formula of this compound is:
a. C2H4O2
b. C3H6O3
c. C2H4O
d. CH2O
Answer:
b. C3H6O3
Question 10
All of the following compounds are acids containing
chlorine. Which compound is the weakest acid?
a. HCl
b. HClO
c. HClO2
d. HClO3
Answer:
b. HClO
End of
AVERAGE
Round
DIFFICULT Round
Question 1
What is the H3O+ concentration of an aqueous solution
with a pH of 12.17?
a. 1.9 x 10-9 M
b. 6.8 x 10-13 M
c. 5.2 x 10-6 M
d. 1.5 x 10-2 M
Answer:
b. 6.8 x 10-13 M
Question 2
Vitamin C is a water-soluble vitamin that is important in forming
collage that gives structure to bones, cartilage, muscle, and blood
vessels. It also helps to maintain capillaries, bones, and teeth and
aids in the absorption of iron. If the molecular formula of
vitamin C is C6H8O6, how many atoms of Carbon atoms are
present in 116 grams of vitamin C?
a.
b.
c.
d.
6.741 x 10 23
3.042 x 10 24
2.381 x 10 24
7.581 x 10 25
Answer:
c. 2.381 x 10 24
Question 3
In the the combustion of propane, C3H8, if 5.0 moles of
C3H8 undergo reaction with Oxygen, how many molecules
of H2O are formed?
C3H8 (g) + 5 O2 (g) → 3CO2 (g) + 4H2O (g)
a.
b.
c.
d.
4.8 x 10 24
3.00 x 10 24
1.20 x 10 25
2.40 x 10 25
Answer:
c. 1.20 x 10 25
Question 4
A radioactive isotope of Copper, 64Cu, decays via the
reaction: 64Cu → 64Zn + β, The half-life of for the
reaction is 12.8 hrs. Starting with 100 g of 64Cu, how
much 64Zn is produced in the reaction in 25.6 hrs?
a. 12.5
b. 50
c. 75
d. 100
Answer:
c. 75
Question 5
Which of the following has the most molecules?
a.
b.
c.
d.
1.00 L of
1.00 L of
1.00 L of
1.00 L of
CH4 at 0°C and 1.00 atm
N2 at 0°C and 1.00 atm
CO2 at 50°C and 1.25 atm
CO at 0°C and 1.25 atm
Answer:
d. 1.00 L of CO at 0°C and 1.25 atm
End of
DIFFICULT
Round