Selenium Trivia Questions and Answers

1: Which Greek goddess is the element Selenium named after?
A: Hera
B: Athena
C: Selene
D: Artemis
Correct Answer: C
Explanation: Selenium is named after Selene, the Greek goddess of the moon, reflecting its connection to tellurium, which is named after the Earth.

2: What is the atomic number of Selenium?
A: 8
B: 16
C: 34
D: 56
Correct Answer: C
Explanation: Selenium has atomic number 34, placing it as the 34th element in the periodic table.

3: In which year was Selenium discovered?
A: 1717
B: 1817
C: 1917
D: 2017
Correct Answer: B
Explanation: Selenium was discovered in 1817 by Jöns Jacob Berzelius and Johann Gottlieb Gahn.

4: What is the most stable form of Selenium at room temperature?
A: Red
B: Yellow
C: Gray
D: Black
Correct Answer: C
Explanation: The most stable and dense form of Selenium at room temperature is gray.

5: Selenium belongs to which group in the periodic table?
A: Group 14
B: Group 16
C: Group 18
D: Group 20
Correct Answer: B
Explanation: Selenium is in group 16 of the periodic table, also known as the chalcogens.

6: What is the primary oxidation state of Selenium in its compounds?
A: +2
B: +4
C: +6
D: -2
Correct Answer: D
Explanation: Selenium commonly exists in oxidation states -2, +4, and +6 in its chemical compounds.

7: Which country is known for producing the most commercial Selenium?
A: Germany
B: Japan
C: USA
D: China
Correct Answer: A
Explanation: Germany is a leading producer of Selenium, contributing significantly to global production.

8: What is Selenium primarily used for in the glass industry?
A: Dyeing glass reddish color
B: Enhancing clarity
C: Making scratch-resistant surfaces
D: Strengthening glass
Correct Answer: A
Explanation: Selenium is used in the glass industry to dye glass a red color, which cancels out undesired tints from impurities.

9: What is the main biological function of Selenium in humans?
A: Bone strengthening
B: Antioxidant support
C: Muscle growth
D: Hydration
Correct Answer: B
Explanation: Selenium plays a crucial role in antioxidant support through involvement in enzymes like glutathione peroxidase.

10: Selenium deficiency can lead to which thyroid condition?
A: Hyperthyroidism
B: Hashimoto’s disease
C: Graves’ disease
D: Goiter
Correct Answer: B
Explanation: Selenium deficiency may exacerbate Hashimoto’s disease, an autoimmune condition affecting the thyroid.

11: In which type of batteries can Selenium be found as an alternative material?
A: Alkaline
B: Lithium-Ion
C: Lithium-Sulfur
D: Nickel-Cadmium
Correct Answer: C
Explanation: Lithium-Selenium batteries are an alternative to lithium-sulfur systems, with advantages in electrical conductivity.

12: Selenium is used in which application for enhanced imaging quality?
A: MRI
B: Ultrasound
C: X-ray detectors
D: Sonography
Correct Answer: C
Explanation: Selenium is used in flat-panel X-ray detectors for high-quality imaging due to its favorable properties.

13: Selenium forms various compounds. Which of these is a common compound of Selenium?
A: Selenium dioxide
B: Selenium chloride
C: Selenium nitrate
D: Selenium phosphate
Correct Answer: A
Explanation: Selenium dioxide (SeO2) is a common Selenium compound, used in various industrial applications.

14: Which allotrope of Selenium is known for its irregular and complex structure?
A: Yellow
B: Black
C: Red
D: White
Correct Answer: B
Explanation: Black Selenium has an irregular, complex structure consisting of polymeric rings.

15: How many naturally occurring isotopes of Selenium are there?
A: 3
B: 5
C: 7
D: 9
Correct Answer: C
Explanation: There are seven naturally occurring isotopes of Selenium, with five being stable.

16: Selenium plays a role in which specific type of enzyme responsible for antioxidant defense?
A: Peroxidase
B: Kinase
C: Lyase
D: Amylase
Correct Answer: A
Explanation: Selenium is crucial for the enzyme family glutathione peroxidases, which reduce reactive oxygen species.

17: What is the chemical symbol for Selenium?
A: Sn
B: Sc
C: Se
D: Sl
Correct Answer: C
Explanation: The chemical symbol for Selenium is Se.

18: Which industrial process primarily produces Selenium as a byproduct?
A: Synthetic Polymer Production
B: Electrolytic Metal Refining
C: Crude Oil Extraction
D: Alkaline Battery Manufacturing
Correct Answer: B
Explanation: Selenium is most commonly produced as a byproduct in the electrolytic refining of metals, especially copper.

19: Large doses of Selenium can lead to a toxic condition known as what?
A: Selenomorphosis
B: Selenosis
C: Seleniumitis
D: Selenopathy
Correct Answer: B
Explanation: Excessive Selenium intake can cause selenosis, characterized by symptoms like hair loss and nervous system damage.

20: Selenium compounds are sometimes used in which household product?
A: Shampoos
B: Detergents
C: Toothpaste
D: Floor Cleaners
Correct Answer: A
Explanation: Selenium disulfide, a compound of Selenium, is used in anti-dandruff shampoos.

21: Which notable scientist discovered Selenium?
A: Albert Einstein
B: Marie Curie
C: Jöns Jacob Berzelius
D: Dmitri Mendeleev
Correct Answer: C
Explanation: Selenium was discovered by the chemist Jöns Jacob Berzelius.

22: What is the melting point of Selenium in Kelvin?
A: 494 K
B: 221 K
C: 373 K
D: 685 K
Correct Answer: A
Explanation: The melting point of Selenium is 494 Kelvin.

23: Which Selenium compound is used in glassmaking to counteract color tints?
A: Selenium sa
B: Zinc selenide
C: Cadmium selenide
D: Sodium selenite
Correct Answer: D
Explanation: Sodium selenite is used in glass manufacturing to counteract green or yellow tints from iron impurities.

24: Which scientific phenomenon was first observed with Selenium’s properties affecting its conductivity?
A: Photoconductivity
B: Superconductivity
C: Piezoelectricity
D: Thermoelectricity
Correct Answer: A
Explanation: In 1873, it was found that the electrical conductivity of gray Selenium was affected by light, leading to its use in photoconductors.

25: Selenium rectifiers, first developed in the 1930s, were primarily replaced by which technology?
A: Silicon Rectifiers
B: Copper Rectifiers
C: Magnetic Induction
D: Thermionic Valves
Correct Answer: A
Explanation: Selenium rectifiers were largely replaced by more efficient silicon rectifiers in the 1970s.

26: Selenium is commonly found as an impurity in which type of ores?
A: Carbonate Ores
B: Sulfide Ores
C: Oxide Ores
D: Halide Ores
Correct Answer: B
Explanation: Selenium is typically found as a minor component in sulfide ores of various metals.

27: What is the most common isotope of naturally occurring Selenium?
A: 72Se
B: 75Se
C: 80Se
D: 82Se
Correct Answer: C
Explanation: The most abundant isotope of naturally occurring Selenium is 80Se, making up about 49.8% of natural Selenium.

28: Selenium deficiencies in humans primarily affect which bodily system?
A: Skeletal
B: Digestive
C: Immune
D: Endocrine
Correct Answer: D
Explanation: Selenium deficiencies primarily affect the endocrine system, particularly the thyroid gland.

29: Which fabricator created the world’s first thin-film solar cell using Selenium?
A: Nikola Tesla
B: Thomas Edison
C: Charles Fritts
D: George Westinghouse
Correct Answer: C
Explanation: Charles Fritts fabricated the first thin-film solar cell using Selenium in the 1880s.

30: Selenium can be used to enhance which type of battery?
A: Nickel-Metal Hydride
B: Lithium-Ion
C: Lithium-Sulfur
D: Alkaline
Correct Answer: C
Explanation: Selenium is used to enhance lithium-sulfur batteries due to its high electrical conductivity.

31: Which property of Selenium makes it useful for X-ray imaging applications?
A: Thermal Conductivity
B: Photoconductivity
C: Electrical Resistance
D: Solubility
Correct Answer: B
Explanation: Selenium’s photoconductivity makes it useful in X-ray detectors, converting X-ray images to patterns of charge.

32: What is the electron configuration of Selenium?
A: [Ar] 3d10 4s2 4p4
B: [Kr] 4d10 5s1 5p3
C: [Ne] 3s2 3p4
D: [Xe] 4f14 5d10 6s2 6p4
Correct Answer: A
Explanation: The electron configuration of Selenium is [Ar] 3d10 4s2 4p4.

33: Selenium is a byproduct in the production of which major industrial material?
A: Aluminum
B: Copper
C: Steel
D: Titanium
Correct Answer: B
Explanation: Selenium is most commonly produced as a byproduct during the refining of copper.

34: Which allotrope of Selenium is used in photocells due to its semiconductor properties?
A: Yellow Selenium
B: Red Selenium
C: Gray Selenium
D: Black Selenium
Correct Answer: C
Explanation: Gray Selenium is used in photocells owing to its semiconductor properties and photoconductivity.

35: What unusual property does Selenium have in its hexagonal form chains?
A: Photoluminescence
B: Chirality
C: High Optical Density
D: High Magnetic Susceptibility
Correct Answer: B
Explanation: The hexagonal form of Selenium consists of chiral helical chains, which are unique to this allotrope.

36: In which electronic component were Selenium rectifiers extensively used before being replaced?
A: Capacitors
B: Transistors
C: Inductors
D: Diodes
Correct Answer: D
Explanation: Selenium rectifiers were extensively used as diodes until they were replaced by silicon-based diodes.

37: What is the chemical formula for Selenium dioxide, a common oxide of Selenium?
A: Se3O2
B: SeO5
C: SeO2
D: Se2O3
Correct Answer: C
Explanation: Selenium dioxide has the chemical formula SeO2, formed through the combustion of elemental Selenium.

38: Selenium is an ingredient in which type of commonly used product for medicinal purposes?
A: Painkillers
B: Multivitamins
C: Cough Syrups
D: Antihistamines
Correct Answer: B
Explanation: Selenium is commonly included as a trace element in multivitamins and dietary supplements.

39: Historically, which famous inventor utilized Selenium in a groundbreaking communication device?
A: Alexander Graham Bell
B: Thomas Edison
C: Guglielmo Marconi
D: Nikola Tesla
Correct Answer: A
Explanation: Alexander Graham Bell used Selenium in his photophone to transmit sound using light in 1879.

40: The discovery of Selenium’s photoconductivity led to its early use in which technological application?
A: Electric Motors
B: Light Meters
C: Automatic Doors
D: Text Messaging
Correct Answer: B
Explanation: Selenium’s photoconductivity was first exploited in light meters and photometers.

41: What is the byproduct formed along with Selenium when Selenium dioxide decomposes at high temperatures?
A: Hydrogen
B: Oxygen
C: Carbon Dioxide
D: Nitrogen
Correct Answer: B
Explanation: When Selenium dioxide decomposes, it produces Selenium and Oxygen.

42: Selenium salts, such as selenite, are known for which property that impacts its use in supplements?
A: High Solubility
B: Low Toxicity
C: High Toxicity
D: Low Conductivity
Correct Answer: C
Explanation: Selenium salts, like selenite, are highly toxic in small doses, posing a risk of selenosis if not properly dosed.

43: What notable property does gray Selenium exhibit that has found use in semiconductors?
A: Isotropic Conductivity
B: Photoconductivity
C: Thermoconductivity
D: Superconductivity
Correct Answer: B
Explanation: Gray Selenium’s photoconductivity has made it useful in semiconductor applications, such as photocells.

44: Which Selenium compound is known for its use in anti-dandruff shampoos?
A: Sodium selenite
B: Selenium dioxide
C: Selenium disulfide
D: Selenium hexafluoride
Correct Answer: C
Explanation: Selenium disulfide is the compound commonly found in anti-dandruff shampoos, helping to control dandruff.

45: Selenium can form a polymeric solid with what kind of molecular structure?
A: Tetrahedral Network
B: Pyramidal Chains
C: Monomeric Rings
D: Hexagonal Grid
Correct Answer: B
Explanation: Selenium forms a polymeric solid with a pyramidal chain structure, particularly noted in Selenium dioxide.

46: What was the discovery by Willoughby Smith in 1873 involving Selenium?
A: Its fluorescence
B: Its magnetic properties
C: Its photoconductivity
D: Its superconductivity
Correct Answer: C
Explanation: Willoughby Smith discovered Selenium’s photoconductivity, which led to its use in light-sensitive applications.

47: The first commercial Selenium product was developed by which scientist?
A: Marie Curie
B: Albert Einstein
C: Werner Siemens
D: Isaac Newton
Correct Answer: C
Explanation: Werner Siemens developed the first commercial products using Selenium, including the Selenium photoelectric cell, in the mid-1870s.

48: Selenium compounds, when combined with sulfur, are used as what type of chemical agent in fireworks?
A: Oxidizing Agent
B: Reducing Agent
C: Coloring Agent
D: Binding Agent
Correct Answer: B
Explanation: Selenium compounds act as reducing agents in the composition of certain fireworks.

49: Selenium is an antagonist to which element, often reducing toxicity in cases of overexposure?
A: Lead
B: Mercury
C: Arsenic
D: Chromium
Correct Answer: B
Explanation: Selenium can reduce the effects of mercury toxicity by binding to the mercury and forming less toxic compounds.

50: Selenium’s interaction with light makes it suitable for which type of sensor?
A: Pressure Sensor
B: Temperature Sensor
C: Optical Sensor
D: Acoustic Sensor
Correct Answer: C
Explanation: Due to its photoconductivity, Selenium is well-suited for use in optical sensors that detect light variations.

51: Selenium rectifiers have been mostly replaced by what more efficient technology for most applications?
A: Copper Rectifiers
B: Germanium Diodes
C: Silicon Diodes
D: Aluminum Rectifiers
Correct Answer: C
Explanation: Silicon diodes have largely replaced Selenium rectifiers due to their higher efficiency and lower cost.

52: Selenium is a byproduct in the commercial refining of which metal?
A: Zinc
B: Copper
C: Iron
D: Aluminum
Correct Answer: B
Explanation: Selenium is often obtained as a byproduct during the electrolytic refining of copper.

53: Which form of Selenium is used for its semiconducting properties in DC power surge protectors?
A: Red
B: Yellow
C: Black
D: Gray
Correct Answer: D
Explanation: Gray Selenium, due to its semiconducting properties, is used in DC power surge protectors.

54: Which oxidation state of Selenium is mostly used in the production of glass pigments?
A: -2
B: 0
C: +4
D: +6
Correct Answer: D
Explanation: Selenates (Se in +6 oxidation state) are used in glass production to impart desired colors.

55: Selenium’s critical role in which human enzyme protects cells from oxidative damage?
A: Amylase
B: Pepsin
C: Glutathione peroxidase
D: Lipase
Correct Answer: C
Explanation: Selenium is crucial for the activity of glutathione peroxidase, an enzyme that protects cells from oxidative damage.

56: How does Selenium enter freshwater ecosystems from human industrial activities?
A: Airborne Dust
B: Agricultural Runoff
C: Chemical Synthesis
D: Direct Discharge
Correct Answer: B
Explanation: Selenium can enter freshwater ecosystems mainly through agricultural runoff, where it leaches from selenium-rich soils.

57: Selenium’s semiconducting properties were first used in the early development of which technology?
A: Radios
B: Telephones
C: Photocopiers
D: Televisions
Correct Answer: C
Explanation: Selenium’s semiconducting properties were first used in the early development of photocopiers, enhancing image clarity.

58: What negative environmental impact can result from Selenium pollution in water bodies?
A: Increased Salinity
B: Bioaccumulation in Aquatic Life
C: Decreased pH Levels
D: Increased Alkalinity
Correct Answer: B
Explanation: Selenium pollution can lead to bioaccumulation in aquatic life, causing toxic effects up the food chain.

59: What form of Selenium is a toxic gas and poses a significant inhalation hazard?
A: Selenium dioxide
B: Hydrogen selenide
C: Sodium selenite
D: Selenium hexafluoride
Correct Answer: B
Explanation: Hydrogen selenide (H2Se) is a highly toxic, corrosive gas that poses a significant inhalation hazard.

60: SSLitgium batteries are being preferred for which specific property of Selenium?
A: High Density
B: Low Weight
C: High Electrical Conductivity
D: Low Melting Point
Correct Answer: C
Explanation: Selenium’s high electrical conductivity makes it a preferred material for lithium batteries, enhancing their efficiency.

What is the best quiz for you business?

Quizzes are super effective for lead generation and selling products. Find the best quiz for your business by answering a few questions.

Take the quiz