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MCAT Chemistry Practice Test
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Preguntas del test (13)
1Which of the following statements are correct.
- Ai) The radius of the O*2 ion is great than that of the O atom
- Bii) The first ionization energy of Se is greater than that of Br
- Ciii) The electronegativity of O is less than of C
2Which atom has the lowest first ionization energy?
- ALi
- BNa
- CK
- DMg
3Which one of the following bonds is the most ionic in character?
- ABe-N
- BLi-F
- CBe-F
- DB-N
4Check all that are FALSE.
- AElectrons occupy orbitals in a way that maximizes the energy of the atom
- BNo two electrons in an atom may have all 4 quantum numbers alike
- CWhen orbitals of different energies (degenerate) are available, electrons initially occupy these orbitals singly
5Elements in a group (column) of the Periodic Table have chemical properties that show many similarities because:
- AThey have the same number of electrons
- BTheir orbitals are the same size
- CTheir orbitals are the same shape
- DThey have the same number of valence electrons
6Which of the following statements is true?
- AUnder the same conditions of temperature and pressure, H2 molecules move faster, on average than O2 molecules.
- BUnder the same conditions of temperature and pressure, the average kinetic energy of O2 molecules is less than that of H2 molecules.
- CThe volume is 1.00 mol of an ideal gas at 25.0 degrees Celsius, 1.00 atm is 22.4 L
- DThe volume of 1.00 mol of H2 gas is only 1/16th of the volume of 1.00 mol of O2 gas, at the same temperature and pressure.
7If you have 11.2 liters of each of the following gases at STP, which one would contain the least molecules (if the gases behave ideally)?
- ACO2
- BO2
- CO3
- DEach gas would have the same number of molecules at STP
8The rate of K depends on...
- Athe concentration of the reactants and the temperature
- Bthe nature of the reactants and the order of the reaction
- Cthe nature of the reactants and the temperature
- Dthe order of the reaction and the concentration of the reactants
9Which of the following statements are correct?
- AA catalyst speeds up a reaction by changing △H, the enthalpy of the reaction
- BAddition of a catalyst to a reaction changes the equilibrium constant
- CA catalyst increases the rates of both the forward and reverse reactions
10The conversion of tert-butyl bromide to tert-butyl alcohol has been found to be first-order with respect to tert-butyl bromide. This reaction was carried out twice. The conditions in the two instances were identical, except that in the second case, the concentration of tert-butyl bromide was twice as high as it was in the first case. In the second case:
- Athe reaction rate is half that of the first case
- Bthe reaction rate is twice that of the first case
- Cthe rate constant is half of what it is in the first case
- Dthe rate constant is twice as much as in the first case
11For catalysts, check all of the following statements that are true:
- ACatalysts increase the rate of the reverse reaction
- BCatalysts change the equilibrium constant so as to shift the equilibrium to the right
- CCatalysts lower the activation energy
- DCatalysts are not consumer in the reaction
12For a reaction at equilibrium, which are true? Check all that apply.
- Athe concentrations of the reactants and products are not changing
- Bthe enthalpy change for the reaction is zero
- Cthe rate of the forward reaction is the same as the rate of the reverse reaction
- Dthe Gibbs free energy is a minimum
13If Q is less than K, the reaction shifts to the right.
- AVerdadero
- BFalso
Información
- Descripción
- SAT MCAT Test sobre MCAT Chemistry Practice Test, creado por Christine Sang el 22/05/2014.
- Autor
- Christine Sang
- Idioma
- English
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