Skip to main content
Sign in Register
Question no. 13046

____________ are analyzed via Polarography?

Select your answer for: ____________ are analyzed via Polarography?
Show answer

Answer: B. Solids

Explanation

Polarography is an electrochemical analytical method typically used with liquid solutions containing electroactive species, not solids.

Subject
Engineering
Topic
—
Difficulty
medium

Related questions

Q1. Which polymer tends to degrade thermally before reaching its melting point ?

Select your answer for: Which polymer tends to degrade thermally before reaching its melting point ?
Show answer

Answer: C. PVC

Polyvinyl chloride undergoes thermal degradation and dehydrochlorination before reaching its melting point. Heating causes the polymer backbone to release hydrogen chloride gas at elevated temperatures. This chemical dec...

Q2. Excess fluoride levels in drinking water lead to__________________?

Select your answer for: Excess fluoride levels in drinking water lead to__________________?
Show answer

Answer: C. Fluorosis

Consuming drinking water containing excessive fluoride concentrations over many years accumulates in hard tissues. This chronic overexposure disrupts normal mineralization processes in developing teeth and skeletal struc...

Q3. What occurs when atmospheric carbon monoxide from chlorophyll decomposition and animal metabolism exceeds the threshold limit value (>50 ppm) ?

Select your answer for: What occurs when atmospheric carbon monoxide from chlorophyll decomposition and animal metabolism exceeds the threshold limit value (>50 ppm) ?
Show answer

Answer: B. Causes asphyxia

Carbon monoxide binds strongly to hemoglobin in human blood, reducing vital oxygen transport. High concentrations exceeding fifty parts per million lead to severe systemic oxygen starvation. This dangerous condition of o...

Q4. The presence of ____________ in water bodies harms aquatic life?

Select your answer for: The presence of ____________ in water bodies harms aquatic life?
Show answer

Answer: D. All A., B. & C.

Soluble toxic organics poison metabolic processes in fish and other aquatic organisms. Suspended solids block sunlight penetration and clog the delicate respiratory gills of aquatic life. Heavy metals and cyanides accumu...

Q5. ____________ is a static characteristic of measuring instruments?

Select your answer for: ____________ is a static characteristic of measuring instruments?
Show answer

Answer: C. Drift

Drift is a static characteristic representing an undesired gradual change in instrument output over time. It occurs independently of any actual changes in the measured process variable itself. Static characteristics desc...

Q6. Water takes on a reddish-brown hue due to dissolved impurities of ______________?

Select your answer for: Water takes on a reddish-brown hue due to dissolved impurities of ______________?
Show answer

Answer: C. Iron & manganese

Dissolved iron and manganese minerals react with oxygen dissolved in water to form colored oxide precipitates. These suspended metal oxides scatter light and deposit rust-colored sediments throughout water distribution s...