Quiz: Economic Importance First Transition Elements: Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, and Zinc

Introduction:
Discover the indispensable role played by first transition elements in our world. From Scandium’s contributions to the MiG fighter aircraft industry to the corrosion resistance of Nickel-chrome alloys, delve into the diverse applications of these elements. This lesson explores their economic importance and specific uses, shedding light on the unique properties that make them essential in various industries.

Quiz:Uses of First Transition Elements (Economic importance)

Scandium (21Sc):
Question 1: Why is Scandium (Sc) used in alloy with Aluminum (Al)?

A) To increase weight
B) To decrease hardness
C) To increase hardness and lightness
D) To decrease durability

Question 2: What is one of the uses of Scandium in mercury vapor lamps?

A) Cooking
B) Television during the day
C) High-efficiency light like sunlight
D) Power generation
Titanium (22Ti):

Question 3: Why are Titanium aluminum alloys used in the aircraft and spacecraft industry?

A) Due to their lightweight and high hardness
B) Due to their low melting point
C) Because they are magnetic
D) Because they are cheap

Question 4: Why is Titanium dioxide (TiO2) used in compounds for protection from sun rays?

A) It prevents the skin from aging
B) Its Nano particles prevent the effect of ultraviolet on the skin
C) It makes the skin glow
D) It is a good moisturizer

Vanadium (23V):

Question 5: What is the main reason Vanadium is used in the manufacturing of car springs?

A) It makes the car colorful
B) It gives high hardness and corrosion resistance
C) It makes the car lightweight
D) It helps in fuel efficiency

Question 6-: What is Vanadium penta oxide (V2O5) used for?

A) Making ice cream
B) Dyes in ceramic and glass industry
C) Fuel for rockets
D) Cooking oil
Chromium (24Cr):

Question 7: Why does Chromium resist atmospheric air?

A) It is non-reactive
B) It forms a non-porous oxide layer above its surface
C) It evaporates in air
D) It reacts with oxygen immediately

Question 8: What is the use of Chromium III oxide (Cr2O3)?

A) Making dyes
B) Making ice cream
C) Fuel for cars
D) Water purification

Manganese (25Mn):

Question 9: Why is Manganese not used in its pure state but in the form of alloys or compounds?

A) It is too expensive
B) It is a brittle element
C) It is too heavy
D) It is highly reactive

Question 10: Why is Manganese used with iron alloys in making railway tracks?

A) It is cheaper than steel
B) It is harder than steel
C) It is a good conductor of electricity
D) It is resistant to corrosion

Iron (26Fe):

Question 11: What is one of the uses of Iron in the manufacturing industry?

A) Making ice cream
B) Manufacturing of reinforced concrete
C) Fuel for cars
D) Making jewelry

Question 12: In what process is Iron used as a catalyst in the ammonia industry?

A) Photosynthesis
B) Haber-Bosch method
C) Fermentation
D) Combustion

Cobalt (27Co):

Question 13: Why does Cobalt look like iron?

A) They have similar colors
B) They can both be magnetized
C) They have similar atomic masses
D) They have the same density

Question 14: What is the main use of Cobalt isotope 60?

A) Making ice cream
B) Food preservation processes
C) Fuel for cars
D) Water purification

Nickel (28Ni):

Question 15: What is the purpose of using Nickel-chrome alloys in heating coils and electrical furnaces?

A) To make them colorful
B) To resist corrosion at high temperatures
C) To increase their weight
D) To make them magnetic

Question 16: Why is Nickel divided as a catalyst used in the hydrogenation process of oils?

A) To make the oil taste better
B) To protect the oil from oxidation and rust
C) To make the oil more viscous
D) To make the oil more flammable

Copper (29Cu):

Question 17: What is the main reason for using copper in making electrical cables?

A) It is a good conductor of electricity
B) It is lightweight
C) It is magnetic
D) It is cheap

Question 18: What is the use of Copper II sulfate (CuSO4)?

A) Insecticide and fungicide
B) Cooking oil
C) Fuel for cars
D) Water purification

Zinc (30Zn):

Question 19: Why is Zinc used in galvanizing other metals?

A) To make them taste better
B) To protect them from rusting
C) To make them more conductive
D) To make them magnetic

Question 20: What is the use of Zinc oxide (ZnO)?

A) Making ice cream
B) In paints, rubber, and cosmetics industry
C) Fuel for rockets
D) Water purification
Answers:
1-C
2-C
3-A
4-B
5-B
6-B
7-B
8-A
9-B
10-B
11-B
12-B
13-B
14-B
15-B
16-B
17-A
18-A
19-B
20-B

 Here are the correct answers for the quiz:

C) To increase hardness and lightness

C) High-efficiency light like sunlight

A) Due to their lightweight and high hardness

B) Its Nano particles prevent the effect of ultraviolet on the skin

B) It gives high hardness and corrosion resistance

B) Dyes in ceramic and glass industry

B) It forms a non-porous oxide layer above its surface

A) Making dyes

B) It is a brittle element

B) It is harder than steel

B) Manufacturing of reinforced concrete

B) Haber-Bosch method

B) They can both be magnetized

B) Food preservation processes

B) To resist corrosion at high temperatures

B) To protect it from oxidation and rust

A) It is a good conductor of electricity

A) Insecticide and fungicide

B) To protect them from rusting

B) In paints, rubber, and cosmetics industry

Here are more questions related to the information you provided:

Manganese (25Mn):

Question 1: What is the role of Manganese dioxide (MnO2) in a dry cell?

A) It makes the cell colorful
B) It acts as a strong oxidizing agent
C) It makes the cell lightweight
D) It improves conductivity

Question 2: What is the purpose of Potassium permanganate (KMnO4)?

A) Fuel for cars
B) It is used as an oxidizing substance and disinfectant
C) Making ice cream
D) Water purification

Iron (26Fe):

Question 3: What is the primary reason for using Iron in the manufacturing of surgical tools?

A) It is cheap
B) It is a good conductor of electricity
C) It is lightweight
D) It can be easily molded into different shapes

Question 4: In the Fischer-Tropsch method, what does Iron act as a catalyst for?

A) Making ice cream
B) Converting water gas to liquid fuel
C) Heating coils
D) Water purification

Cobalt (27Co):

Question 5: Why is Cobalt-60 used in food preservation processes?

A) To add color to the food
B) It produces gamma rays with high penetrating power
C) It enhances flavor
D) It acts as a preservative

Question 6: In what industry is Cobalt used in making dry batteries?

A) Aerospace
B) Automobile
C) Electronics
D) Agriculture

Nickel (28Ni):

Question 7: What is the significance of using Nickel in making nickel-cadmium batteries?

A) They are lightweight
B) They can be easily recycled
C) They can resist rust
D) They can be recharged

Question 8: Why is divided Nickel used as a catalyst in the hydrogenation process of oils?

A) To increase the oil’s viscosity
B) To protect the oil from oxidation and rust
C) To enhance the oil’s color
D) To reduce the oil’s flammability

Copper (29Cu):

Question 9: What role does Copper II sulfate (CuSO4) play in water purification?

A) It acts as a disinfectant
B) It makes the water taste better
C) It improves water conductivity
D) It adds color to the water

Question 10: Why is Copper used in making electrical cables?

A) It is magnetic
B) It is lightweight
C) It is a good conductor of electricity
D) It is inexpensive Here are additional questions:

Zinc (30Zn):

Question 11: What is the primary purpose of using Zinc oxide (ZnO) in paints?

A) To add fragrance
B) To enhance color
C) To protect from rusting
D) To improve texture

Question 12: In what industries is Zinc sulfide (ZnS) used?

A) Food processing
B) Making fireworks
C) Illuminated paints and X-ray screens
D) Textile manufacturing

General Questions:
Question 1: What is the economic significance of first transition elements despite forming only about 7% of the Earth’s crust?

Question 2: Explain the importance of Vanadium penta oxide (V2O5) in the context of catalysis and resistance to corrosion.

Question 3: Why is Nickel-chrome alloy preferred for heating coils and electrical furnaces compared to other materials?

Question 4: Discuss the role of Copper II sulfate (CuSO4) in both insecticide and fungicide applications and its use in water purification.

Question 5: Elaborate on the reasons behind the use of Cobalt-60 in various applications, including food preservation, industrial quality detection, and medical applications.

The answers of all questions
Here are the answers to the questions:

Scandium (21Sc):
Answer: C) To increase hardness and lightness
Answer: C) High-efficiency light like sunlight
Titanium (22Ti):
Answer: A) Due to their lightweight and high hardness
Answer: B) Its Nano particles prevent the effect of ultraviolet on the skin
Vanadium (23V):
Answer: B) It gives high hardness and corrosion resistance
Answer: B) Dyes in ceramic and glass industry
Chromium (24Cr):
Answer: B) It forms a non-porous oxide layer above its surface
Answer: A) Making dyes
Manganese (25Mn):
Answer: B) It is a brittle element
Answer: B) It is harder than steel
Answer: B) Haber-Bosch method
Answer: B) Making soft drink cans
Iron (26Fe):
Answer: B) They can both be magnetized
Answer: B) Food preservation processes
Cobalt (27Co):
Answer: B) To resist corrosion at high temperatures
Answer: B) Protect it from oxidation and rust
Nickel (28Ni):
Answer: A) It is a good conductor of electricity
Answer: A) Insecticide and fungicide
Answer: B) To protect them from rusting
Answer: B) In paints, rubber, and cosmetics industry
Copper (29Cu):
Answer: B) It acts as a strong oxidizing agent
Answer: B) It is used as an oxidizing substance and disinfectant
Answer: D) It can be easily molded into different shapes
Answer: B) Converting water gas to liquid fuel
Zinc (30Zn):
Answer: B) It produces gamma rays with high penetrating power
Answer: C) Electronics
Answer: D) They can be recharged
Answer: B) To protect the oil from oxidation and rust
Copper (29Cu):
Answer: A) It acts as a disinfectant
Answer: C) It is a good conductor of electricity
Zinc (30Zn):
Answer: C) To protect from rusting
Answer: C) Illuminated paints and X-ray screens

General Questions:
Answer: First transition elements have economic importance due to their diverse applications in various industries, despite forming only about 7% of the Earth’s crust.

Answer: Vanadium penta oxide (V2O5) is important for its role in catalysis, specifically as a catalyst in the production of strong magnetic conductors, and its resistance to corrosion in various applications.

Answer: Nickel-chrome alloy is preferred for heating coils and electrical furnaces due to its ability to resist corrosion at high temperatures.

Answer: Copper II sulfate (CuSO4) is used as an insecticide and fungicide due to its toxic properties to pests and fungi. In water purification, it helps eliminate contaminants.

Answer: Cobalt-60 is used in food preservation processes due to its ability to emit gamma rays, making it effective in killing bacteria and parasites. It is also employed in industry for quality detection and in medicine for diagnostic and treatment purposes.