WorksheetsII BCom C Quiz
Total questions: 15
Worksheet time: 8mins
The presence of E. coli in river water is considered a strong indicator of:
Industrial chemical discharge
Natural microbial balance
Fecal contamination
Increased mineral content
Which activity most directly links human behavior to E. coli contamination in the Chandragiri River?
Fishing activities
Irrigation practices
Open defecation near riverbanks
Natural soil erosion
Why does E. coli contamination make river water unsafe for domestic use even if it appears clear?
It increases water hardness
It alters water taste
Pathogens may be present without visible signs
It changes water temperature
From a chemical and biological perspective, high bacterial load primarily affects:
pH value only
Turbidity alone
Dissolved oxygen levels
Salinity concentration
A reduction in dissolved oxygen due to bacterial activity will most directly impact:
River flow speed
Aquatic life balance
Water color
Mineral solubility
Which of the following diseases is least likely to be directly associated with E. coli contaminated water?
Diarrhea
Dysentery
Typhoid
Malaria
Why are children and elderly people more vulnerable to E. coli infections?
Higher exposure to river water
Poor taste sensitivity
Weaker immune systems
Increased water consumption
Which contamination source reflects infrastructure failure rather than individual negligence?
Open defecation
Cattle waste
Untreated sewage discharge
Household garbage dumping
The role of Chemistry for Survival in addressing river contamination mainly involves:
River cleaning operations
Legal enforcement
Water testing and purification methods
Wildlife protection
Regular water quality testing helps primarily by:
Improving river aesthetics
Detecting contamination early
Increasing fish population
Preventing floods
If sewage discharge into the Chandragiri River is stopped, which outcome is most likely first?
Immediate removal of all bacteria
Improvement in dissolved oxygen levels
Elimination of water-borne diseases
Complete ecosystem recovery
The Chandragiri River is crucial to Kasaragod district mainly because it:
Supports tourism only
Is the longest river in Kerala
Serves drinking, irrigation, and livelihood needs
Is an industrial water source
Which preventive measure addresses the root cause of E. coli contamination most effectively?
Boiling water at home
Installing sewage treatment systems
Avoiding fishing
Increasing river depth
The detection of E. coli in 2022 water tests indicates:
Seasonal pollution only
Chemical contamination dominance
Biological contamination due to waste
Natural river aging
Which statement best summarizes the overall conclusion of the study?
River pollution is unavoidable
Chemical pollutants are the main concern
E. coli contamination demands collective action
Only government agencies are responsible
