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Environmental Chemistry > miscellaneous > Flashcards

miscellaneous Flashcards

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1
Q

BOD full form

A

biochemical oxygen demand

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2
Q

BOD for clean water

A

<5 ppm

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3
Q

BOD of highly polluted water

A

> 17ppm

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4
Q

heavy metals as inorganic pollutants

A

Cd, Hg, Ni

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5
Q

what does heavy metal do

A

damage CNS, liver, kidneys

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6
Q

which metal interferes with the maturity of RBC

A

Pb

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7
Q

what is eutrophication

A

loss of biodiversity

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8
Q

tolerable limit of nitrates

A

50 ppm

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9
Q

nitrates causes

A

blue baby syndrome

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10
Q

tolerable limit of flourides

A

1 to 2 ppm

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11
Q

effect of flourides

A

bones and teeth degradation

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12
Q

tolerable limit of sulphates

A

500 ppm

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13
Q

effect of sulphates

A

laxative effect

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14
Q

tolerable limit of lead

A

50 ppb

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15
Q

effect of Pb

A

kidney, brain, liver, RBS DEGRADATION

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16
Q

pH of drinking water

A

5.5-9.5

17
Q

when was DDT banned

A

1985

18
Q

eg of organochlorines

A

DDT, BHC, aldrein, endrin, dieldrin

19
Q

which pesticides are less persistent

A

carbamates, organophosphates

20
Q

hebricides eg

A

sodium chlorate, sodium arsenite

21
Q

biodegradable waste are produced by

A

cotton mills, food processing units, paper mills, textile factories

22
Q

non biodegradable waste are produced by

A

fertilizer industries, mud and tailing from metal industries, slag from steel industries, fly ash from thermal power plants

23
Q

how can we do prevention of industrial waste

A

incineration

24
Q

what was earlier used a s a solvent for dry cleaning

A

tetrachloroethene

25
Q

new solvent for dry cleaning

A

H2O2

26
Q

new compound for bleaching paper

A

H2O2

27
Q

replacement of halogenated solvent is

A

liquid CO2

28
Q

herbicide is produced by what in green chemistry

A

catalytic hehydrogenation of diethanolamine

29
Q

which drug is successfully prepared by green chemistry

A

ibuprofen

30
Q

preparation of ethanal requires which catalyst

A

Pd/Cu in water

31
Q

who won nobel prize for metathesis

A

yves chauvin, robert h grubbs, richard r schrokk

Environmental Chemistry (2 decks)

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