WorksheetsSECOND QUARTERLY EXAMINATION (2nd Quarter) GENERAL CHEMISTRY 1
Total questions: 50
Worksheet time: 38mins
What happens to the volume of a gas when the pressure increases at constant temperature?
It increases
It decreases
It remains constant
It doubles
What is the relationship between pressure and volume according to Boyle’s Law?
Directly proportional
Inversely proportional
Constant
Independent
What is the formula for Boyle’s Law?
PV = k
V/T = k
P/T = k
PV/T = k
What is the volume of a gas if it occupies 100 mL at 150 kPa and the pressure changes to 200 kPa (constant temperature)?
150 mL
133 mL
75 mL
200 mL
What is the constant product of pressure and volume for Boyle’s Law known as?
R
k
n
T
What happens to the volume of a gas when its temperature increases at constant pressure?
It decreases
It increases
It stays the same
It becomes zero
What is the relationship in Charles’ Law?
P ∝ T
V ∝ T
V ∝ 1/P
P ∝ V
What will be the new volume if a gas occupies 473 cm³ at 36°C (309 K) and is heated to 94°C (367 K)?
390 cm³
512 cm³
562 cm³
600 cm³
What is the formula used to calculate gas expansion due to temperature change?
P1V1 = P2V2
V1/T1 = V2/T2
P1/T1 = P2/T2
PV = nRT
What unit of temperature must always be used in gas law calculations?
Celsius
Fahrenheit
Kelvin
Rankine
What is the Kelvin equivalent of 25°C?
248 K
273 K
298 K
300 K
What does Gay-Lussac’s Law state about pressure and temperature?
They are directly proportional
They are inversely proportional
They are equal
They are constant
What is the temperature of a gas if its pressure drops from 765 torr at 296 K to 560 torr?
180 K
217 K
280 K
296 K
What formula combines Boyle’s, Charles’, and Gay-Lussac’s Laws?
PV = nRT
P1V1/T1 = P2V2/T2
V1/T1 = V2/T2
P1/T1 = P2/T2
What is the pressure (in atm) of 0.412 mol of He in a 3.25 L container at 16°C?
1.01 atm
2.02 atm
3.01 atm
4.00 atm
What is the value of the universal gas constant R in L·atm/mol·K?
0.821
8.31
0.0821
1.00
What is the ideal gas equation?
PV = nRT
PV = Tn
P/T = n/V
PV/T = k
What is the molar volume of any gas at STP?
1.00 L
22.4 L
24.0 L
25.5 L
What will be the volume of 85 g of O₂ at 25°C (298 K) and 104.5 kPa? (R=8.315 kPa·L/mol·K; M=32 g/mol)
32 L
64 L
22.4 L
40 L
What is the formula for Dalton’s Law of Partial Pressures?
PV = nRT
Ptotal = P1 + P2 + ...
P = kV
P/T = k
What is the pressure of dry gas if the total pressure is 94.4 kPa and water vapor pressure is 2.72 kPa?
94.4 kPa
97.12 kPa
91.7 kPa
100 kPa
What law explains why lighter gases diffuse faster than heavier gases?
Boyle’s Law
Dalton’s Law
Graham’s Law
Avogadro’s Law
What is the ratio of the rate of diffusion between Kr and Br₂?
1.00
1.25
1.38
2.00
What is the molar mass of an unknown gas that diffuses 4 times faster than O₂?
2 g/mol
4 g/mol
8 g/mol
16 g/mol
What principle states that equal volumes of gases contain equal numbers of molecules?
Dalton’s Law
Graham’s Law
Avogadro’s Law
Gay-Lussac’s Law
What does the term “electron configuration” describe?
The arrangement of electrons in an atom
The nucleus of an atom
The mass of an atom
The charge of an atom
What principle states that electrons fill the lowest energy levels first?
Pauli Exclusion
Hund’s Rule
Aufbau Principle
Bohr Principle
What is the electron configuration of sodium (Na, atomic number 11)?
1s² 2s² 2p⁶ 3s¹
1s² 2s² 2p⁶ 3s²
1s² 2s² 2p⁶ 3p¹
1s² 2s² 2p⁶ 3p⁶
What is the electron configuration of chlorine (Cl, atomic number 17)?
1s² 2s² 2p⁶ 3s² 3p⁵
1s² 2s² 2p⁶ 3s² 3p⁴
1s² 2s² 2p⁶ 3s² 3p⁶
1s² 2s² 2p⁶ 4s² 3p⁵
What is the number of electrons in the third energy level of phosphorus (P)?
2
8
5
13
What is the shape of the p orbital?
Spherical
Dumbbell
Cloverleaf
Linear
What is the maximum number of electrons that can occupy the d-subshell?
2
4
6
10
What is the electron configuration of oxygen (O)?
1s2 2s2 2p4
1s2 2s2 2p6
1s2 2s2 3p4
1s2 2s2 2p3
What element has the configuration 1s2 2s2 2p6 3s2 3p1?
Magnesium
Aluminum
Silicon
Phosphorus
What rule states that no two electrons can have the same set of quantum numbers?
Aufbau Principle
Pauli Exclusion Principle
Hund’s Rule
Bohr Model
What is the number of valence electrons in sulfur (S)?
4
6
8
2
What is the condensed electron configuration of calcium (Ca)?
[Ne] 3s2
[Ar] 4s2
[Ar] 3d2
[Kr] 4s2
What is the last orbital filled in zinc (Zn)?
3d10
4s2
4p6
4d10
What sublevel follows 3p according to the Aufbau diagram?
4s
3d
4p
5s
What element has the electron configuration [Ar] 3d5 4s1?
Chromium
Manganese
Iron
Cobalt
What does theoretical yield mean in a chemical reaction?
The experimentally measured product
The maximum product predicted by calculation
The reactant left unreacted
The product lost during reaction
What does percent yield compare?
Actual yield to reactant amount
Actual yield to theoretical yield
Product to reactant ratio
Reactant to catalyst ratio
What is the formula for percent yield?
(Actual / Theoretical) × 100
(Theoretical / Actual) × 100
(Product / Reactant) × 100
(Reactant / Product) × 100
What is the percent yield if the theoretical yield is 25 g and the actual yield is 20 g?
60%
70%
80%
90%
What is the actual yield if the theoretical yield is 15 g and percent yield is 80%?
10 g
12 g
15 g
18 g
What is the theoretical yield of water if 4 g of hydrogen reacts completely with 32 g of oxygen (2H2 + O2 → 2H2O)?
36 g
18 g
9 g
4 g
What is the percent yield if the theoretical yield is 40 g and 30 g were produced?
65%
70%
75%
80%
What happens to percent yield when product loss occurs during filtration?
It increases
It decreases
It stays the same
It doubles
What determines the theoretical yield in a reaction?
The limiting reactant
The excess reactant
The catalyst
The solvent
What is the percent yield if 8.0 g of product is obtained from a theoretical yield of 10.0 g?
70%
75%
80%
85%
