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1 | |
The hydride ion |
| | A) | is a strong acid. |
| | B) | is a strong reducing agent. |
| | C) | is a strong oxidizing agent. |
| | D) | is neither an oxidant nor a reductant. |
| | E) | is found in molecules such as CHCl3. |
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2 | |
Which of the following elements has the highest boiling point? |
| | A) | argon |
| | B) | bromine |
| | C) | chlorine |
| | D) | xenon |
| | E) | oxygen |
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3 | |
In which one of the following ways does lithium differ from the other alkali metals? |
| | A) | Its ionization energy is lower than expected. |
| | B) | It reacts with organic halides to form molecular compounds. |
| | C) | It has an unusually high density. |
| | D) | Its salts are much more soluble in water than those of the other alkali metals. |
| | E) | It has an unusually low melting point. |
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4 | |
When magnesium reacts with water |
| | A) | the water is oxidized. |
| | B) | magnesium is reduced. |
| | C) | oxygen and MgO are produced. |
| | D) | magnesium is oxidized and water is reduced. |
| | E) | the resultant solution will be acidic. |
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5 | |
Relative to a temperature of 20°
C and a pressure of 1 atmosphere, what changes in conditions are necessary to move into the region of the carbon phase diagram where diamond becomes the stable phase? |
| | A) | temperature must be raised |
| | B) | temperature and pressure must both be raised |
| | C) | temperature must be lowered, pressure must be raised |
| | D) | pressure must be raised |
| | E) | temperature must be raised, pressure must be lowered |
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6 | |
Consider all of the known elements. Which element has the greatest ability to covalently bond to itself and to form multiple bonds? |
| | A) | Al |
| | B) | B |
| | C) | C |
| | D) | Si |
| | E) | H |
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7 | |
The products, H3PO3 and HCl, are formed when _______ reacts with ______. |
| | A) | PCl5(l), H2O(l) |
| | B) | PCl3(l), H3PO4(aq) |
| | C) | PCl3(l), H2O(l) |
| | D) | PCl5(l), H3PO4(aq) |
| | E) | P4(s), HClO4(l) |
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8 | |
One of the nitrogen oxides is a very important biochemical messenger. It is a colorless, paramagnetic gas. What is its formula? |
| | A) | N2O4 |
| | B) | N2O |
| | C) | N2O3 |
| | D) | NO2 |
| | E) | NO |
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9 | |
Predict the products of the reaction of P4O10 and H2O. |
| | A) | hydrogen gas, oxygen gas and phosphorus |
| | B) | phosphoric acid |
| | C) | phosphorous acid |
| | D) | hydrogen peroxide and phosphane |
| | E) | oxygen gas and phosphane |
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10 | |
What is the chemical formula for the superoxide ion, formed when K, Rb or Cs react with oxygen? |
| | A) | O- |
| | B) | O22- |
| | C) | O2- |
| | D) | O3- |
| | E) | O2- |
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11 | |
Select the correct statement about ozone. |
| | A) | It reflects ultraviolet light away from the earth’s surface. |
| | B) | It reacts with oxygen molecules to form oxygen atoms. |
| | C) | It is good for your health. |
| | D) | It is useful because it destroys chlorofluorocarbons. |
| | E) | It dissociates when it absorbs ultraviolet light. |
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12 | |
What is the formula for the active ingredient in bleach? |
| | A) | Cl2 |
| | B) | NaOH |
| | C) | H2O2 |
| | D) | NaClO3 |
| | E) | NaClO |
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13 | |
If X is a halogen element, what is the general formula for a perhalic acid? |
| | A) | HXO4 |
| | B) | HXO3 |
| | C) | HXO2 |
| | D) | HXO |
| | E) | HX |
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14 | |
Which, if any, of the following halogen displacement reactions would not occur? |
| | A) | Cl2 + 2NaBr(aq) → Br2 + 2NaCl(aq) |
| | B) | Cl2 + 2KI(aq) →
I2 + 2KCl(aq) |
| | C) | Br2 + 2NaI(aq) →
I2 + 2NaBr(aq) |
| | D) | I2 + 2KCl(aq) →
Cl2 + 2KI(aq) |
| | E) | All of these displacement reactions would be expected to occur. |
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15 | |
Which, if any, of the following elements, will react with xenon to form xenon halides? |
| | A) | fluorine |
| | B) | bromine |
| | C) | chlorine |
| | D) | iodine |
| | E) | None, since xenon is inert toward reaction with all halogens. |
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