Alloys — Set 2
Chemistry · मिश्र धातुएं · Questions 11–20 of 50
What is the primary alloy used to make coins in many countries?
Correct Answer: B. Cupro-nickel
• **Cupro-nickel** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: different metal element; C: different metal element; D: different metal element.
Which of these alloys is characterized by its property of 'shape memory'?
Correct Answer: B. Nitinol
• **Nitinol** = is the correct answer to this question. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; C: incorrect choice for stated use; D: incorrect choice for stated use.
Which alloy of copper and zinc is used for making cheap jewelry and musical instruments?
Correct Answer: C. Brass
• **Brass** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; B: incorrect choice for stated use; D: incorrect choice for stated use.
The alloy 'Invar' is famous for having a very low coefficient of what?
Correct Answer: C. Thermal expansion
• **Thermal expansion** = is the correct answer to this question. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; B: incorrect choice for stated use; D: incorrect choice for stated use.
Which of the following describes an alloy?
Correct Answer: C. A homogeneous mixture
• **A homogeneous mixture** = is the correct answer to this question. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; B: incorrect choice for stated use; D: incorrect choice for stated use.
What is the primary constituent of 'Bell Metal'?
Correct Answer: A. Copper
• **Copper** = is the correct answer to this question. • **Industrial use** — extracted and processed for various applications. • 💡 Wrong-option analysis: B: incorrect choice for stated use; C: different metal element; D: different metal element.
Which alloy is typically used for making the filaments of early incandescent bulbs?
Correct Answer: D. Tungsten-based alloys
• **Tungsten-based alloys** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; B: incorrect choice for stated use; C: incorrect choice for stated use.
Which metal is added to Iron to produce 'Invar'?
Correct Answer: D. Nickel
• **Nickel** = is added to provide specific functionality. • **Industrial use** — extracted and processed for various applications. • 💡 Wrong-option analysis: A: different metal element; B: different metal element; C: different metal element.
Which alloy is predominantly used for making surgical instruments?
Correct Answer: B. Stainless Steel
• **Stainless Steel** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; C: incorrect choice for stated use; D: incorrect choice for stated use.
Monel metal is a highly corrosion-resistant alloy consisting of which two metals?
Correct Answer: B. Nickel and Copper
• **Nickel and Copper** = is the correct answer to this question. • **Industrial use** — extracted and processed for various applications. • 💡 Wrong-option analysis: A: different metal element; C: incorrect choice for stated use; D: different metal element.