Free Printable Chemistry Olympics Quiz Part Two

Worksheets

Chemistry Olympics Quiz Part Two

Total questions: 17

Worksheet time: 34mins

Name

Class

Date

Which of the following conditions describes a spontaneous process?

K<1

E>0

G>0

None of these describe a spontaneous process.

As you go down the noble gas family on the periodic table, the boiling temperature increases. This trend is due mainly to

an increase in hydrogen bonding.

a decrease in dipole interactions.

the lower atomic masses as you go down the family.

an increase in London dispersion forces.

The [OH^-] of a certain solution is 1.0x10^-5M. The pH of the same solution is

1.0x10^-14

5.00

7.00

9.00

In a closed flexible system, 7.0 mol CO₂, 7.0 mol Ar, 7.0 mol N₂ and 4.0 mol Ne are trapped. The total pressure is 10.0 atm. What is the partial pressure exerted by the neon gas?

1.6 atm

4.0 atm

10.0 atm

21.0 atm

In which bond does the oxygen atom possess a partial positive charge?

O-H

O-F

N-O

O-C

The Nernst equation is helpful in calculating E^o_cell values for electrochemical cells in which

the temperature is not 0^oC.

the temperature is not 25^oC.

the concentrations of the solutions are not all 1.00 M.

equilibrium has been reached.

Which statement is false?

All standard heats of formation cancel in a balanced chemical equation.

The standard heat of formation for oxygen gas is zero.

The heat of reaction can be calculated from the standard heats of formation.

The heat of reaction at a constant external pressure is called the enthalpy change.

16 grams of methane and 32 grams of oxygen reacted to produce carbon dioxide and water. 11 grams of carbon dioxide was produced. Calculate the percent yield in this reaction.

5.0%

10%

25%

50%

The correct name for Mg(OH)₂ is

magnesium hydroxide

magnesium(II) hydroxide

magnesium(I) hydroxide

magnesium hydrogen oxide

10.

Which of the following represents a chemical change?

water boiling

iodine subliming

sugar dissolving in water

natural gas burning

11.

Aluminum reacts with sulfuric acid, H₂SO₄, to form aluminum sulfate, Al₂(SO₄)₃, and hydrogen gas. Give the sum of all coefficients in the balanced chemical equation.

12.

Hydrogen and nitrogen gas react to form ammonia gas. The enthalpy change of the reaction is -92 kJ. Increasing the temperature would

increase the concentration of ammonia.

increase the concentration of nitrogen.

decrease the concentration of hydrogen.

Nothing will happen

13.

The energy diagram for the reaction

X + Y ⟶ Z

is shown here. The addition of a catalyst to this reaction would cause a change in which of the indicated energy differences?

I only

II only

III only

I and II only

14.

A 1–molar solution of which of the following salts has the highest pH?

NaNO₃

Na₂CO₃

NH₄Cl

NaHSO₄

15.

PCl₅ ⇌ PCl₃ + Cl₂

A container holds only PCl₅ at 10.0 atm. The system is allowed to reach equilibrium. At equilibrium, the total pressure is 12.6 atm. What is the partial pressure of PCl₅ at equilibrium?

2.6 atm

4.8 atm

7.4 atm

10.0 atm

16.

Nitrogen gas has a pressure of 12.0 atm at 727°C. What is the density of the gas in g/L?

0.020 g/L

0.041 g/L

2.1 g/L

4.2 g/L

17.

The frequency of a particular wavelength of light is 1.0×10¹⁵ Hz. What is the energy carried by these photons in kJ/mol?

50 kJ/mol

100 kJ/mol

400 kJ/mol

2000 kJ/mol

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Chemistry Olympics Quiz Part Two

Total questions: 17

Worksheet time: 34mins

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