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Interactive Quiz 1
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1

In which compound does hydrogen carry a negative charge?
A)NH3
B)BH3
C)CaH2
D)HCl
E)CHCl3
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
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.
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
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.
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
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
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.
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
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
11

The correct formula of the sulfide ion is
A)S2-
B)S22-
C)S-
D)S2-
E)none of the above.
12

Which nonmetal exists as a reddish-brown liquid at room temperature?
A)Xe
B)Br
C)I
D)Se
E)P
13

Which acid is used to etch glass?
A)sulfuric acid
B)perchloric acid
C)nitric acid
D)hydrochloric acid
E)hydrofluoric acid
14

The halogens are
A)strong acids
B)strong bases
C)strong oxidizing agents
D)strong reducing agents
E)not very reactive
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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