Class 12 Chemistry Coordination Compounds Important Questions. We covered all the Class 12 Chemistry Coordination Compounds Important Questions in this post for free so that you can practice well for the exam.
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Class 12 Chemistry Coordination Compounds Important Objective Questions for Students
Bronze is an alloy of:
(a) Copper and tin.
(b) Copper and zinc.
(c) Copper and iron.
(d) Iron and nickel.
Option a – Copper and tin
A substance acquired in the form of a brownish film on a piece of iron left in the open for some time is:
(a) Rust.
(b) Salt.
(c) Soil.
(d) Dust.
Option a – Rust
Stainless steel contains:
(a) Fe + Cr+ Ni.
(b) Fe+Ni+ Cu.
(c) Fe + Cr + Cu.
(d) Fe+ C + Ni.
Option a – Fe + Cr+ Ni
Constantan is an alloy of copper and:
(a) Iron.
(b) Nickel.
(c) Aluminium.
(d) Tin.
Option b – Nickel
Brass is a mixture of:
(a) Copper and zinc.
(b) Copper and tin.
(c) Copper, nickel, and zinc.
(d) Copper, aluminum, and magnesium.
Option a – Copper and zinc
Stainless steel is an alloy in which the following is added along with iron:
(a) Zinc.
(b) Chromium.
(c) Tin.
(d) Copper.
Option b – Chromium
Which pair of the following is of copper alloys?
(a) Brass and Invar.
(b) Bronze and Nichrome.
(c) Brass and Bronze.
(d) None of the above.
Option c – Brass and Bronze
Hard steel contains:
(a) 2 to 5% carbon.
(b) 0.5 to 1.5% carbon.
(c) 0.1 to 0.4% carbon.
(d) 0.01 to 0.04% carbon.
Option b – 0.5 to 1.5% carbon
German silver is an alloy of:
(a) Gold and silver.
(b) Copper and silver.
(c) Copper, zinc, and silver.
(d) Copper, zinc, and nickel.
Option d – Copper, zinc, and nickel
‘German silver’ is used to make decorative articles, coinage metal, ornaments, etc. The name is given because:
(a) It is an alloy of copper and contains silver as one of its components.
(b) Germans were the first to use silver.
(c) Its appearance is like silver.
(d) It is an alloy of silver.
Option c – Its appearance is like silver
Stainless steel does not rust because:
(a) Chromium and nickel combine with iron.
(b) Chromium forms an oxide layer and protects iron from rusting.
(c) Nickel present in it does not rust.
(d) Iron forms a hard chemical compound with chromium present in it.
Option b – Chromium forms an oxide layer and protects iron from rusting
Bronze is often used to make statues and medals, whereas brass is used in making utensils, scientific apparatus, and cartridges. Both brass and bronze are copper-containing alloys, yet they differ in their chemical composition for additionally containing:
(a) Zinc in brass and tin in bronze.
(b) Chromium in brass and nickel in bronze.
(c) Nickel in brass and tin in bronze.
(d) Iron in brass and nickel in bronze.
Option a – Zinc in brass and tin in bronze
We covered all the class 12 chemistry coordination compounds important questions above in this post for free so that you can practice well for the exam.
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