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CHAPTER NO 15
ENVIRONMENTAL CHEMISTRY
Encircle the most appropriate answer among the following option
1 Human body consists of __ % water:
(a) 70
(b) 60.
(c) 40
(d) 30
2 The ocean contains about % of world water:
(a) 97
(b) 98
(c) 90
(d) 97.1
3 water also present in the atmosphere in form of:
(a) rain drops
(b) Dew
(c) Water vapors
(d) rivers Only
4 only …% of the total water on the earth is potable :
(a) 0.6
(b) 0.9
(c) 0.2
(d) 2
5 Water is composed of:
(a) Oxygen, hydrogen
(b) Nitrogen, Hydrogen
(c) Nitrogen, Oxygen
(d) Oxygen, Hydrogen, Carbon
6 The freezing point of water is:
(a) 0°C
(b) 20°C
(c) 100°C
(d) 1°C
7 The boiling point of water is – at sea level
(a) 100 °C .
(b) 0°C
(c) 50 °C
(d) 101
8 The maximum density of water is at 4°C:
(a) 3 g/cm3
(b) 1 gm3
(c) 1 g/cm2
(d) 1 gom-3
9 Water is excellent solvent for: :
(a) ionic compounds
(b) Molecular compounds
(c) Both a and b
(d) None
10 Water has surface tension:
(a) high
(b) low
(c) moderate
(d) comparable
11 Water is a universal:
(a) solvent
(b) solute
(c) Both a and b
(d) donor
12 Water molecule has structure:
(a) polar
(b) non-polar
(c) Both a and b
(d) diatomic
13 Soft water is that which produces _lather with soap:
(a) good
(b) bad
(c) rough
(d) fine
14 CaCO2 + CO2 + H2O —→ :.
(a) Ca(HCO3 )2
(b) Ca(HCO3 )
(c) Ca(HCO3)2
(d) Ca2CO3
15 MgCO3 + CO2 +H2O
(a) Mg(HCO3)2
(b) Mg(HCO)2
(c) Mg(HCO3)
(d) MgCl
16 Gypsum is strongly in water:
(a) soluble
(b) Insoluble
(c) None of these
(d) Both a and b.
17 HCO3 makes the water:
(a) hard
(b) soft
(c) clean
(d) waxy
18 Specific heat capacity of water is:
(a) 4.2 jkg-1K-1
(b) 2.4 jkg-1K-1
(c) 3.4 jkg-1K-1
(d) 4.2 jkg-1K-1
19 Water dissolves non-ionic compound by:
(a) ion-ion forces
(b) ion-dipole forces
(c) hydrogen bonding
(d) covalent bonds
20 Temporary hardness is because of presences of bicarbonates of _ _ and magnesium.
(a) calcium
(b) potassium
(c) gypsum
(d) copper
21 The removal of .. and Ca’* ions which are responsible for the hardness is called water softening.
(a) Mg2+
(b) k
(c) SO24
(d) Cu2+
22 Temporary hardness is because of:
(a) Ca(HCO3)
(b) MgCO3
(c) CaCO3
(d) NaCl
23 Temporary hardness is removed by adding:
(a) lime stone
(b) slaked lime
(c) lime water
(d) Na2CO3
24 Permanent hardness can only be removed by using:
(a) lime stone
(b) slaked lime
(c) lime water
(d) chemicals
25 Hard water consumes large amount of ___ __ in washing purposes:
(a) soap
(b) power
(c) slaked lime
(d) detergents
26 Drinking hard water causes disorders:
(a) blood
(b) Heart
(c) stomach
(d) kidney
27 It is sodium salt of a long carboxylic acid:
(a) acid
(b) soap
(c) lime
(d) Sodium chloride
28 Hard water contains salts of
(a) Magnesium, calcium
(b) Magnesium, potassium
(c) Calcium, potassium
(d) Ca, Cu
29 Water pollution is contamination of water:
(a) Bodies
(b) Molecules
(c) Compounds
(d) prices
30 Vibrios cholera may be found in water contaminated by:
(a) Human feces
(b) Animal feces
(c) Both a and b
(d) human urine
31 Fluorosis is a disease caused by the consumption of excess :
(a) Chlorine
(b) Bromine
(c) Fluoride
(d) Astatine
32 Which of the following disease cause liver inflammation?
(a) Typhoid
(b) Cholera
(c) Hepatitis
(d) Jaundice
33 Hepatitis and can be transmitted by contaminated water:
(a) B, C .
(b) A, E .
(C) A D
(d) B, A :
34 Hookworm infects the:
(a) Small intestine
(b) Large intestine
(c) Stomach.
(d) Liver
35 Hookworm infects about. billion people worldwide per annum:
(a) 1
(b) 2
(c) 4
(d) 5
36 Water pollution causes rapid growth of:
(a) Bacteria .
(b) Algae
(c) Chemicals
(d) Pollutants
37 Water pollution is unfit for : purposes:
(a) Cleaning
(b) Washing
(c) Both a and b
(d) drinking
38 In some parts of the world, the water supply contains small amount of _ compounds:
(a) Chlorine
(b) Bromine
(c) Fluorine
(d) iodine
39 Lack of proper sanitation facilities is the main cause of rapidly spreading diseases:
(a) Water borne
(b) Water pollution
(c) hepatitis
(d) heart
40 Diarrhea may be caused by viruses:
(a) Bacteria
(b) Parasites
(c) Both a and b
(d) fungal infections
41 Dysentery is a disease of:
(a) Intestine
(b) Stomach
(c) Heart.
(d) liver
42 Cholera is an acute infection caused by_ bacteria:
(a) Cholerae
(b) Vibrio cholerae
(c) Both a and b
(d) None of these\
43 A large number of soap is wasted in formation:
(a) Scum
(b) Detergents
(c) Soda
(d) None of these
44 Water pollution due to agriculture waste is because of use of the:
(a) Fertilizers
(b) Pesticide
(c) Both a and b.
(d) insecticide
45 Fertilizers are used to make up deficiency of:
(a) Nitrogen.
(b) Phosphorus
(c) Both a and b
(d) calcium
46 Aquatic animals feel suffocation and ultimately die due to insufficient supply of:
(a) Oxygen
(b) Hydrogen
(c) Carbon dioxide
(d) None of these
47 Water borne diseases:
(a) Dysentery
(b) Cholera
(c) Both a and b
(d) pneumonia
48 Heavy metals like Cadmium, Lead and Mercury are toric and health hazards for:
(a) Humans
(b) Animals
(c) Both a and b
(d) plants
49 Use of detergents is increasing day by day for cleaning purposes in: :
(a) Houses
(b) Industries.
(c) Both a and b
(d) classes
50 Detergents can work even in solutions:
(a) Acidic
(b) Basic
(c) Both a and b
(d) Alkaline
51 The _salt is present in detergents cause rapid growth of algae in water:
(a) nitrate
(b) Phosphate
(c) Magnesium
(d) Both a and b
52 Jaundice is caused by an excess of in blood:
(a) Bile pigments
(b) RBC’s
(c) WBC’s
(d) thrombocytes
53 Patient feels weakness and fatigue in:
(a) Jaundice
(b) Hepatitis
(c) Cryptosporidium
(d) Cholera
54 Typhoid is a dangerous _disease:
(a) Intestinal .
(b) Bacteria
(c) Infections
(d) fungal
55 Chlorine kills:
(a) Bacteria
(b) Micro-organisms
(c) Both a and b
(d) germs
56 Swimming pools are cleaned by:
(a) Chlorination
(b) Fluorination
(c) Bromination
(d) Both b and c
57 Hardness is of _types:
(a) Four
(b) Two
(c) Three
(d) Five
58 Used water is called:
(a) Waste water
(b) Sewage
(c) Both a and b
(d) none of these
59 Good quality Water is colorless and:
(a) odorless
(b) Tasteless
(c) Both a and b
(d) softly Pure water has
60 pure water has __conductivity:
(a) High
(b) Very low
(c) Both a and b ,
(d) None of these
61 A disease that causes bone and tooth damage:
(a) Jaundice
(b) Fluorosis
(c) Hepatitis
(d) Asthma
62 Sea water is unfit for purposes:
(a) Drinking .
(b) Agriculture
(c) Both a and b
(d) Washing
63 Water is a universal solvent because of its:
(a) Polarity
(b) Hydrogen bonding ability
(c) Both a and b
(d) Covalent bonding
64 Which one of the following properties of water is responsible for rising of water in plants?
(a) Surface tension
(b) Capillary action
(c) Heat capacity
(d) Specific heat
65 Permanent hardness because of Mg2+ and Ca2:
(a) SO42-
(b) CL
(c) Both a and b
(d) Phosphates