Deck 1: Understanding Water Pollution and Its Effects on Aquatic Life

Question 1

___________ poisoning water in Japan is from fishes.

A)Bismuth
B)Arsenic
C)Antimony
D)Palladium

Answer 1

Arsenic

Question 2

Fishes can store more quantity of ___________ in their bodies.

A)Mercury
B)Bismuth
C)Palladium
D)Chlorine

Answer 2

Mercury

Question 3

Waste water released from _________ are not the sources of bacteria.

A)Sanitaria
B)Municipalities
C)Tanning
D)Industries

Answer 3

Industries

Question 4

Bacteria and micro organisms present in the water will cause _________ in human and animals.

A)Indigestion
B)Intestinal tract
C)Brain tumour
D)Cancer

Question 5

Infectious hepatitis is caused by ___________

A)Bacteria
B)Viruses
C)Protozoa
D)Helminth

Question 6

Amoebic dysentery is caused by ___________

A)Viruses
B)Bacteria
C)Helminth
D)Protozoa

Question 7

Bacteria in water causes ________

A)Malaria
B)Typhoid
C)Dengue
D)Chicken guinea

Question 8

Helminth in the water causes __________

A)Hook worm
B)Amoebic dysentery
C)Cholera
D)Typhoid

Question 9

The ____________ is an important requirement of the aquatic life.

A)Dissolved nitrogen
B)Dissolved chlorine
C)Dissolved oxygen
D)Dissolved methane

Question 10

The optimum value in natural water is ________

A)2-4ppm
B)4-7ppm
C)4-6ppm
D)2-7ppm

Question 11

The disappearance of the plants and animals is due to the _________ in water. www.rejinpaul.comwww.rejinpaul.com Download updated materials from Rejinpaul Network App

A)Nitrogen depletion
B)Chlorine depletion
C)Oxygen depletion
D)Ozone depletion

Question 12

The decomposition of the matter produces into ___________ and in presence of ____________

A)Carbondioxide and oxygen
B)Oxygen and nitrogen
C)Nitrogen and carbondioxide
D)Nitrogen and chlorine

Question 13

The organic matter present in the water is of __________ types.

A)Two
B)Three
C)Four
D)Five

Question 14

The temperature of sewage increases. What will be the effect on the dissolved oxygen in sewage?

A)Remains constant
B)Increase
C)Decrease
D)No effect

Question 15

What is the minimum quantity of dissolved oxygen that should be present in the treated sewage?

A)6ppm
B)4ppm
C)1ppm
D)10ppm

Question 16

The presence of which of the following in sewage indicates nitrogen content before decomposition of sewage?

A)Nitrites
B)Nitrates
C)Free ammonia
D)Albuminoid nitrogen

Question 17

The presence of free ammonia in sewage represents ____________

A)Air pollution
B)Old pollution
C)Recent pollution
D)Water pollution

Question 18

Which chemical is used for the titration of waste water for finding its chloride content?

A)Potassium chloride
B)Sodium chloride
C)Potassium chromate
D)Potassium dichromate

Question 19

The type of solids which floats in sewage is __________

A)Suspended solids
B)Settleable solids
C)Dissolved solids
D)Total solids

Question 20

The presence of which of the following indicates old pollution?

A)Nitrates
B)Nitrites
C)H₂S
D)Sulfates

Question 21

________ is used to find the D.O content of sewage.

A)Winkler method
B)Chromatography
C)Kjeldahl method
D)Olfactometer

Question 22

The permissible dose of chloride in domestic sewage is __________

A)120ppm
B)10ppm
C)1ppm
D)250ppm

Question 23

Imhoff cone is used to measure the _______

A)Suspended solids
B)Settleable solids
C)Dissolved solids
D)Total solids

Question 24

The decomposition of sewage takes place, causing a pungent smell. Which of the following causes the pungent smell?

A)CO₂
B)H₂SO₄
C)HCL
D)H₂S