| 1 |
The two major components of atmosphere are: |
- A. Hydrogen and oxygen
- B. Nitrogen and Hydrogen
- C. Nitrogen and oxygen
- D. Oxygen and water.
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| 2 |
At dynamic equilibrium: |
- A. The reactions stops to proceed
- B. The amounts of reactants and products are equal
- C. The speed of the forward is reverse reactions are equal
- D. The reaction can no longer be reversed
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| 3 |
The value of K<sub>c</sub> depends on. |
- A. Temperature
- B. Pressure
- C. Volume
- D. Atmosphere
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| 4 |
In an irreversible reaction dynamic equilibrium: |
- A. Never establishes
- B. Established before the completion of reaction
- C. Establishes after the completion of reaction
- D. Establishes readily
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| 5 |
The substances formed during the chemical reaction are called. |
- A. Product
- B. Reactants
- C. Radicals
- D. Element
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| 6 |
The reaction in which the number of moles reactants and products not equal in balance chemical equation the units of Kc for this reactions are |
- A. mol<sup>-2</sup>
- B. dm<sup>3</sup>
- C. mol<sup>2</sup>
- D. mol dm<sup>-1</sup>
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| 7 |
At equilibrium state there are possibilities: OR types of chemical equilibrium are. |
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| 8 |
A complete reaction is one is which. |
- A. All the reactants convert into products.
- B. All the reactants do not convert into products.
- C. Half reactants convert into products.
- D. Only 10% reactants convert into products.
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| 9 |
Which type of reactions take place in both directions? |
- A. Addition reactions
- B. Reversible reactions
- C. Irreversibel reactions
- D. Decomposition reactions
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| 10 |
The characteristics of reversible reactions are the following except: |
- A. Products never recombine to form reactants.
- B. They never complete
- C. The proced in both ways
- D. They have a double arrow between reactants and products.
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