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1 | |
In which compound does hydrogen carry a negative charge? |
| | A) | NH3 |
| | B) | BH3 |
| | C) | CaH2 |
| | D) | HCl |
| | E) | CHCl3 |
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2 | |
Which of the following oxides will dissolve in water to form an acidic solution? |
| | A) | BaO |
| | B) | Na2O |
| | C) | P4O10 |
| | D) | PbO2 |
| | E) | SiO2 |
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3 | |
Select the correct order of decreasing melting points of the alkali metals. |
| | A) | Li > Cs > Rb > K > Na |
| | B) | Cs > Rb > K > Na > Li |
| | C) | Li > Na > K > Rb > Cs |
| | D) | Li > K > Na > Cs > Rb |
| | E) | None of the above orders is correct. |
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4 | |
What products are formed in the thermal decomposition of barium carbonate? |
| | A) | barium hydroxide and water |
| | B) | barium carbide and oxygen gas |
| | C) | barium metal, oxygen gas, and carbon monoxide |
| | D) | barium metal and carbon monoxide |
| | E) | barium oxide and carbon dioxide |
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5 | |
Which element in Group 4A(14) usually occurs in the +2 oxidation state? |
| | A) | C |
| | B) | Si |
| | C) | Sb |
| | D) | Pb |
| | E) | None of them, since they always occur in the +4 oxidation state. |
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6 | |
Which of the following is not a use for carbon dioxide? |
| | A) | to provide the "bite" in soft drinks |
| | B) | in fire extinguishers |
| | C) | as a refrigerant |
| | D) | in the Frasch process |
| | E) | in the manufacture of soda ash |
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7 | |
Which of the following is an orange-brown paramagnetic gas which is present in photochemical smog? |
| | A) | N2O4 |
| | B) | N2O |
| | C) | N2O3 |
| | D) | NO2 |
| | E) | NO |
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8 | |
The geometries of the species PCl3, PCl5, and PCl6- are, respectively, |
| | A) | trigonal planar, trigonal bipyramidal and octahedral. |
| | B) | pyramidal, square pyramidal, and octahedral. |
| | C) | trigonal planar, trigonal bipyramidal and octahedral. |
| | D) | trigonal pyramidal, square pyramidal and octahedral. |
| | E) | none of the above. |
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9 | |
When copper is treated with moderately concentrated nitric acid, the nitric acid is reduced to |
| | A) | N2 |
| | B) | NH4+ |
| | C) | NO3- |
| | D) | NO |
| | E) | N2O |
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10 | |
What is the most stable allotropic form of elemental sulfur at room temperature? |
| | A) | diatomic S2 molecules |
| | B) | a diamond like covalent network solid |
| | C) | S8 molecules with ring structure |
| | D) | S4 molecules in a tetrahedral arrangement |
| | E) | a planar covalent network solid, like graphite |
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11 | |
The correct formula of the sulfide ion is |
| | A) | S2- |
| | B) | S22- |
| | C) | S- |
| | D) | S2- |
| | E) | none of the above. |
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12 | |
Which nonmetal exists as a reddish-brown liquid at room temperature? |
| | A) | Xe |
| | B) | Br |
| | C) | I |
| | D) | Se |
| | E) | P |
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13 | |
Which acid is used to etch glass? |
| | A) | sulfuric acid |
| | B) | perchloric acid |
| | C) | nitric acid |
| | D) | hydrochloric acid |
| | E) | hydrofluoric acid |
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14 | |
The halogens are |
| | A) | strong acids |
| | B) | strong bases |
| | C) | strong oxidizing agents |
| | D) | strong reducing agents |
| | E) | not very reactive |
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15 | |
Comparing neon with xenon, one would expect neon to have a ________ density at STP, and a ________ normal boiling point than xenon. |
| | A) | higher, higher |
| | B) | higher, lower |
| | C) | lower, higher |
| | D) | lower, lower |
| | E) | Since they are both noble gases, their densities and boiling points will be very similar. |
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