10th Class Chemistry Chapter 15 MCQs with Answers

10th Class Chemistry Chapter 15 MCQs with Answers: The 10th Class Chemistry Chapter “Environmental Chemistry” immerses us in the world of chemical interactions and their impact on the environment. Within this enlightening chapter, we explore the principles, processes, and significance of environmental chemistry in understanding and addressing environmental challenges.

10th Class Chemistry Chapter 15 MCQs with Answers

Prepare to embark on a captivating journey where we unravel the mysteries of environmental chemistry and its role in preserving and protecting our planet. We delve into the understanding of chemical reactions and their influence on the atmosphere, water bodies, and soil. As we delve deeper, we encounter the concept of pollutants, understanding their sources, effects, and mitigation strategies.

Our exploration extends to the concept of air pollution, learning about the composition of the atmosphere and the various pollutants that can adversely affect air quality. We delve into the understanding of greenhouse gases, their role in climate change, and the strategies to reduce their emissions. We explore the concept of acid rain, ozone depletion, and smog formation, understanding their causes and consequences.

The 10th Class Chemistry Chapter 15 further unveils the significance of water pollution and its impact on aquatic ecosystems and human health. We learn about the sources and types of water pollutants, including industrial waste, agricultural runoff, and domestic sewage. We explore the concept of water treatment and the importance of sustainable water management practices.

Through practical examples, case studies, and real-life applications, we enhance our understanding of environmental chemistry. We sharpen our ability to analyze and interpret environmental issues, pollutant sources, and their impact on ecosystems. We unlock the ability to unravel the mysteries of environmental chemistry and apply this knowledge to real-world situations.

Studying 10th Class Chemistry Chapter 15 “Environmental Chemistry” in the 10th Class Chemistry curriculum nurtures critical thinking skills, analytical reasoning, and a deeper understanding of the principles that govern chemical interactions in the environment. It equips us with the tools to comprehend and appreciate the importance of environmental preservation, the sources and effects of pollutants, and the strategies for sustainable environmental management. So let us embark on this enlightening journey, where we explore the captivating realm of environmental chemistry, unraveling the secrets of chemical interactions in the environment and expanding our understanding of the dynamic world of chemistry.

What is ENVIRONMENTAL CHEMISTRY?

Environmental chemistry is the study of chemical processes that occur in water, air, terrestrial and living environments, and the effects of human activity on them. It includes topics such as astrochemistry, atmospheric chemistry, environmental modeling, geochemistry, marine chemistry and pollution remediation.

CHAPTER NO 15 ENVIRONMENTAL CHEMISTRY

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) SO₄^2-

(b) CL

(c) Both a and b

(d) Phosphates