____ 11. Which statement regarding battery-powered electric cars is NOT correct?
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Question
____ 11. Which statement regarding battery-powered electric cars is NOT correct? Currently battery-powered electric cars ________
a.
are more efficient than internal combustion engines.
b.
have a limited range due to battery capacity.
c.
use energy produced primarily by the combustion of coal and natural gas.
d.
show promise in shifting the energy needs of our transportation system from petroleum to nuclear and solar sources.
e.
do not contribute to pollution of the atmosphere by producing carbon dioxide, nitrogen oxides, and other noxious gases.
____ 12. How many structural (constitutional) isomers are there for propylene, and why?
a.
two, because of resonance
b.
two, because of geometrical isomerism
c.
two, because the double bond can be in either one of two locations
d.
none, because the two skeletal structures can be superimposed
e.
none, because double bonds always occur on the right in alkenes
14. Are the methyl groups in xylene, C6H4(CH3)2, included in the aromatic part of the molecular structure?
a.
Yes, the aromatic bonding extends throughout the molecule.
b.
Yes, but only when the resonance form with double bonds to the methyl groups exists.
c.
No, only the carbons in the ring are involved in the aromatic system.
d.
No, only the hydrogens in the ring are involved in the aromatic bonding.
e.
No, only the carbon atoms in xylene are involved in aromatic bonding, not the hydrogens.
____ 15. How many structural isomers does xylenol, (CH3)2C6H3OH, have?
a.
None—i.e., there is only 1 molecule
d.
6
b.
2
e.
8
c.
4
____ 17. Which of the following do you predict has the highest fuel value?
a.
benzene, C6H6
d.
1-hexyne, C6H10
b.
cyclohexane, C6H12
e.
hexane, C6H14
c.
1-hexene, C6H12
19. The alcohol functional group has the bonding arrangement ________
a.
C ¾ O ¾ H.
d.
C ¾ O ¾ O ¾ H.
b.
C ¾ O ¾ C.
e.
R ¾ O ¾ H, where R is any element.
c.
Al ¾ O ¾ H.
a.
are more efficient than internal combustion engines.
b.
have a limited range due to battery capacity.
c.
use energy produced primarily by the combustion of coal and natural gas.
d.
show promise in shifting the energy needs of our transportation system from petroleum to nuclear and solar sources.
e.
do not contribute to pollution of the atmosphere by producing carbon dioxide, nitrogen oxides, and other noxious gases.
Explanation / Answer
11. Which statement regarding battery-powered electric cars is NOT correct? Currently battery-powered electric cars ________
a.
b.
c.
use energy produced primarily by the combustion of coal and natural gas.-------answer
d.
e.
A battery electric vehicle (BEV),
It is a sort of electric vehicle (EV) that utilizations synthetic vitality put away in rechargeable battery packs.
It use electric engines and engine controllers rather than inward ignition motors (ICEs) for impetus.
They get all force from battery packs and in this manner have no inward burning motor, power module, or fuel tank.
It incorporate bikes, bikes, skateboards, rail autos, watercraft, forklifts, transports, trucks and autos
____ 12. How many structural (constitutional) isomers are there for propylene, and why?
a.
b.
c.
d.
e.
none, because double bonds always occur on the right in alkenes –answer
Propene, otherwise called propylene or methyl ethylene, is an unsaturated natural compound having the concoction recipe C3H6. It has one twofold bond, and is the second easiest individual from the alkene class of hydrocarbons.
14. Are the methyl groups in xylene, C6H4(CH3)2, included in the aromatic part of the molecular structure?
a.
b.
Yes, but only when the resonance form with double bonds to the methyl groups exists.-answer
Xylene is a noteworthy petrochemical delivered by synergist transforming furthermore by coal carbonisation in the production of coke fuel. It is found in little amounts in gas and air ship powers. Xylenes are essentially created as a major aspect of the BTX aromatics (benzene, toluene and xylenes) removed from the result of synergist improving known as "reformate".
____ 15. How many structural isomers does xylenol, (CH3)2C6H3OH, have?
a.
d.
6--answer
b.
2
e.
8
c.
4
____ 17. Which of the following do you predict has the highest fuel value?
a.
benzene, C6H6----answer
d.
e.
19. The alcohol functional group has the bonding arrangement ________
a.
C ¾ O ¾ H. ----answer
d.
b.
e.
c.
a.
b.
c.
use energy produced primarily by the combustion of coal and natural gas.-------answer
d.
e.
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