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Aluminium Acting Like Transition Metals | Bayer & Hall-Héroult Process | UPSC Science & Tech

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📘 ENGLISH CONTENT

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Recent research shows that Aluminium can behave similarly to transition metals like Palladium, Rhodium, and Platinum under certain conditions.

Aluminium (Al, atomic number 13) is a post-transition metal and is one of the most abundant metals on Earth.

It is extracted from bauxite ore through a two-step industrial process.

Extraction Process

1. Bayer Process

Bauxite is treated with sodium hydroxide to obtain aluminium hydroxide, which is then heated to form alumina (Al₂O₃).

2. Hall-Héroult Process

Alumina is subjected to electrolytic reduction to produce pure aluminium. This process requires large amounts of electricity.

Properties of Aluminium

  • Lightweight and strong
  • Excellent corrosion resistance
  • High thermal and electrical conductivity
  • Highly malleable and ductile
  • Recyclable with only ~5% energy of original production

Applications

  • Transport: Aircraft, automobiles, railways
  • Household: Utensils, foil, appliances
  • Infrastructure: Doors, windows, cladding
  • Electrical: Transmission lines
  • Strategic Uses: Defence, aerospace, nuclear sectors

Significance of Research

Traditionally, transition metals are known for catalytic properties.

If aluminium shows similar behavior, it could become a cheaper alternative catalyst, reducing dependence on expensive metals like platinum and palladium.

This has major implications for industrial chemistry, energy efficiency, and sustainable technology.

📘 MCQs (ENGLISH)

Q1. Aluminium atomic number:

A. 11

B. 12

C. 13

D. 14

Answer: C

Q2. Aluminium is:

A. Transition metal

B. Post-transition metal

C. Non-metal

D. Noble gas

Answer: B

Q3. Ore of aluminium:

A. Hematite

B. Bauxite

C. Magnetite

D. Galena

Answer: B

Q4. Bayer process produces:

A. Aluminium

B. Alumina

C. Bauxite

D. Iron

Answer: B

Q5. Hall-Héroult process is:

A. Chemical

B. Biological

C. Electrolytic

D. Mechanical

Answer: C

Q6. Aluminium is:

A. Heavy

B. Light

C. Gas

D. Liquid

Answer: B

Q7. Aluminium is used in:

A. Aircraft

B. Cars

C. Wires

D. All

Answer: D

Q8. Recycling aluminium needs:

A. More energy

B. Same energy

C. Less energy

D. No energy

Answer: C

Q9. Transition metals include:

A. Sodium

B. Calcium

C. Platinum

D. Aluminium

Answer: C

Q10. New research shows aluminium can:

A. Rust

B. Melt

C. Act like transition metals

D. Break easily

Answer: C

📘 हिंदी कंटेंट


हाल ही में शोध में पाया गया कि Aluminium कुछ परिस्थितियों में Palladium, Rhodium और Platinum की तरह व्यवहार कर सकता है।

निष्कर्षण प्रक्रिया

Bayer Process: बॉक्‍साइट से एलुमिना बनता है

Hall-Héroult Process: एलुमिना से शुद्ध एल्युमिनियम बनता है

गुण

  • हल्का और मजबूत
  • जंग-रोधी
  • अच्छा चालक
  • आसानी से ढलने वाला

उपयोग

  • विमान, गाड़ी
  • बर्तन, फॉयल
  • निर्माण
  • बिजली
  • रक्षा

महत्व

यह शोध एल्युमिनियम को सस्ते कैटेलिस्ट के रूप में उपयोगी बना सकता है।

📘 MCQs (हिंदी)

Q1. एल्युमिनियम का परमाणु संख्या क्या है?

A. 11

B. 12

C. 13

D. 14

उत्तर: C

Q2. यह किस प्रकार का धातु है?

A. संक्रमण

B. पोस्ट-ट्रांजिशन

C. अधातु

D. गैस

उत्तर: B

Q3. इसका अयस्क क्या है?

A. हेमेटाइट

B. बॉक्‍साइट

C. मैग्नेटाइट

D. गैलेना

उत्तर: B

Q4. Bayer process क्या बनाता है?

A. एल्युमिनियम

B. एलुमिना

C. बॉक्‍साइट

D. लोहा

उत्तर: B

Q5. Hall-Héroult process क्या है?

A. रासायनिक

B. जैविक

C. विद्युत

D. यांत्रिक

उत्तर: C

Q6. एल्युमिनियम कैसा है?

A. भारी

B. हल्का

C. गैस

D. तरल

उत्तर: B

Q7. इसका उपयोग कहाँ होता है?

A. विमान

B. कार

C. तार

D. सभी

उत्तर: D

Q8. रीसाइक्लिंग में ऊर्जा:

A. अधिक

B. समान

C. कम

D. नहीं

उत्तर: C

Q9. ट्रांजिशन मेटल कौन है?

A. सोडियम

B. कैल्शियम

C. प्लेटिनम

D. एल्युमिनियम

उत्तर: C

Q10. नया शोध क्या बताता है?

A. जंग

B. पिघलना

C. ट्रांजिशन जैसा व्यवहार

D. टूटना

उत्तर: C

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