Easy 1 likes

Question

Name two copper containing alloys. State one use of each alloy.

WBBSE Class X Physical Science Metallurgy 02 Mark 2025

Answer

Two copper alloys:

Copper Alloy Composition Uses
Brass Copper (Cu): 60–80%
Zinc (Zn): 20–40%
Utensils, instrument parts, water taps
German silver Copper (Cu): 50–60%
Zinc (Zn): 25%
Nickel (Ni): 15–25%
Instrument parts, ornaments

Related Questions

More WBBSE Easy level questions

1/12
Easy
Q. Explain the difference between minerals and ores.
A. Minerals Ores Minerals are naturally occurring substances found in the Earth’s crust....
Easy
Q. Which of the following is an ore of Aluminium? (a) Hematite (b) Bauxite (c) Malachite...
A. (b) Bauxite Explanation: Bauxite is the chief ore of aluminium. It contains...
Easy
1
Q. Write the names of two bio-degradable polymers.
A. Examples of biodegradable polymers : Polylactic acid (PLA) Polyhydroxybutyrate (PHB)
Moderate
Q. Name the metal which is extracted in thermite process.
A. Fe Explanation: Thermite process reduces metal oxides using Al at high temperature...
Moderate
Q. Left Column 2.2.1 Metal present in German silver 2.2.2 A transuranium element 2.2.3 The metal...
A. 2.2.1 – (d), 2.2.2 – (c), 2.2.3 – (b), 2.2.4 – (a).​...
Easy
Q. What is now used in electrical circuits instead of fuse wire?
A. MCB / Miniature circuit breaker
Easy
Q. What type of lens is used as a magnifying glass?
A. Convex lens Explanation: Convex lens forms virtual, erect, magnified image for objects...
Easy
Q. Name the greenhouse gas discharged from a refrigerator.
A. CFC / HFC
Easy
Q. Which layer of atmosphere is susceptible to storm and rain?
A. Troposphere Explanation: Troposphere is the lowest layer nearest to Earth's surface, where...
Easy
Q. Which metal is used as catalyst in Haber’s process for preparation of ammonia?
A. The metal used as a catalyst in the Haber’s process for the...
Easy
Q. Which gas is produced at the cathode during electrolysis of acidified water?
A. Hydrogen. Explanation: In electrolysis of acidified water with Pt electrodes, H⁺ ions...
Easy
Q. State True or False: Electrolysis always involves the process of oxidation-reduction.
A. True. Explanation: Electrolysis drives chemical reactions using electrical energy, involving oxidation at...