An amber haze over a city indicates the presence of HNO_3 NO NO_2 O_3 Photochemi

Question

An amber haze over a city indicates the presence of HNO_3 NO NO_2 O_3 Photochemical smog occurs mainly in cold, wet weather dry, sunny weather flat, dry areas snowy, mountainous areas the main source of photochemical smog in most areas is automobiles electric power plants chemical factories solid waste burning Radon in homes comes from gas cooking ranges fire alarms leaking heater exhausts soil and rocks in the stratosphere, some O_2 is converted to acid rain ammonia ozone water Chlorofluorocarbons harm the ozone layer by adding more ozone blocking UV radiation destroying oxygen destroying ozone Which portion of the Sun's radiation spectrum is absorbed by ozone? blue infrared violet ultraviolet What type of radiation is trapped on Earth's surface by the greenhouse effect? gamma infrared ultraviolet visible Which of the following is not a property of water? expands when it freezes has a low specific beat has a high heat of vaporization is a useful solvent for many substances Water's unique properties arise because water molecules have hydrogen atoms that do not have a stable electron configuration associate through hydrogen bonds can form covalent bonds with ionic substances can form covalent bonds with nonpolar substances in a collection of water molecules, hydrogen bonds form between an H atom in one H_2O molecule and the O atom in another H_2O molecule the O atoms in different H_2O molecules the two H atoms in a single H_2O molecule two H atoms in different H_2O molecules Frozen water has an open structure with an amorphous molecular arrangement large hexagonal holes molecules that are in constant motion molecules that tend to repel each other Energy to power the water cycle comes from electric power plants hurricanes the sun thunderstorms Hard water may be characterized by the presence of all of the following ions except Ca^2+ Fe^2+ K^+ Mg^2+ It is estimated that half of the world's hospital beds are occupied by people with waterborne diseases. the main causes of these are microorganisms DDT and dooms lead and mercury pesticides

Explanation / Answer

15) option c

16)option b

17)option c

18)option d

19)option c

20)option d

21)OPTION D

22)OPTION B

23)OPTION B

24)option B

25)option a

26)option b

27)option c

28)option c

29)option a

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