Gases, rates and equilibrium

What volume does 1 mole of an ideal gas occupy at 273 K and 1 atm?

• 1 11.2 L
• 2 24 L
• 3 22.4 L
• 4 1 L

According to Boyle's law, if the pressure of a gas is doubled at constant temperature, its volume:

• 1 Doubles
• 2 Stays the same
• 3 Becomes four times
• 4 Halves

For a first order reaction, the half-life:

• 1 Is independent of the starting concentration
• 2 Depends on the starting concentration
• 3 Is zero
• 4 Doubles each half-life

Which is the expression for Kc of the reaction N2O4 <-> 2NO2?

• 1 [N2O4] / [NO2]^2
• 2 [NO2]^2 / [N2O4]
• 3 [NO2] / [N2O4]
• 4 [NO2]^2 x [N2O4]

In a buffer solution, pH = pKa when:

• 1 [A-] equals [HA]
• 2 [HA] is zero
• 3 [A-] is twice [HA]
• 4 The solution is neutral

Hess's law says that the enthalpy change of a reaction:

• 1 Is always negative
• 2 Depends on the path taken
• 3 Is the same whether it takes place in one step or several
• 4 Depends only on the catalyst

Which solution has the highest boiling point at the same molality?

• 1 Urea
• 2 Glucose
• 3 Sodium chloride
• 4 Calcium chloride

At constant temperature, if the pressure of a gas is doubled its volume becomes:

• 1 Double
• 2 One quarter
• 3 Unchanged
• 4 Half

The volume of 1 mole of an ideal gas at STP is:

• 1 22.4 dm³
• 2 24 dm³
• 3 1 dm³
• 4 11.2 dm³

The number of moles in 4 g of NaOH is: (Na = 23, O = 16, H = 1)

• 1 1
• 2 0.4
• 3 4
• 4 0.1