Question : Which of the following is an organic impurity in sewage?
Option 1: Phosphates
Option 2: Human faeces
Option 3: Nitrates
Option 4: Metals
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Correct Answer: Human faeces
Solution : The correct answer is Human faeces.
Human faeces is an organic impurity in sewage. It contains organic matter such as undigested food, bacteria, and other biological substances. These organic impurities contribute to the Biochemical Oxygen Demand (BOD) in sewage, affecting water quality and necessitating proper treatment before discharge into the environment.
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Question : Which of the following statement(s) is/are correct?
Option 1: Oxides of non-metals are basic
Option 2: Oxides of non-metals are acidic
Option 3: Oxides of metals are acidic
Option 4: All options are correct
Question : Which of the following metals has the least melting point?
Option 1: Gold
Option 2: Silver
Option 3: Mercury
Option 4: Copper
Question : Which among the following is not a characteristic of transition metals?
Option 1: Tendency to gain an electron
Option 2: Low electronegativity
Option 3: Low ionisation energy
Option 4: Malleability
Question : Which of the following metals contribute to biomagnification problem in the ecosystem?
Option 1: Mercury
Option 2: Chromium
Option 3: Copper
Option 4: Lead
Question : Directions: Which one of the following responses would be the meaningful order of the following? 1. India 2. Bangalore 3. Asia 4. Karnataka
Option 1: 3, 4, 2, 1
Option 2: 2, 4, 1, 3
Option 3: 3, 1, 2, 4
Option 4: 1, 2, 3, 4
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