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Copper and Its Compounds



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Q1. In general, copper is highly reactive with sulphur and its chemical compounds.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q2. At zero level temperature of copper alloys, they become very hard and brittle in nature.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q3. Copper alloys possess good mechanical properties even at high temperatures.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q4. Copper alloys have low thermal conductivity but high electrical conductivity.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q5. Copper alloys generally have sparking nature due to its high ductility.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q6. Which of the following parts are mostly manufactured by using copper alloys?

(a) Pistons
(b) Engine blocks
(c) Journal bearings
(d) Aircrafts

Q7. For protection of copper alloys from corrosion, a special type of coating is applied on it.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q8. What are the steps involved in purifying copper? (In order of precedence)

(a) Smelting-Roasting-Converting
(b) Smelting-Converting-Roasting
(c) Converting-Roasting-Smelting
(d) Roasting-Smelting-Converting

Q9. Which method is used to extract copper from sulphide ores?

(a) Froth floatation
(b) Leaching
(c) Screening
(d) Mechanical agitation

Q10. Which among the following is an ore of copper?

(a) Hematite
(b) Magnetite
(c) Chalcopyrite
(d) Siderite


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Highest (+7) Oxidation State Is Shown By

Modified 240 Year Ago

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240 Year Ago

Highest (+7) Oxidation State Is Shown By

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279 views

The Outer Electron Configuration Of Gd (At. No. 64) Is

Modified 309 Year Ago

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309 Year Ago

The Outer Electron Configuration Of Gd (At. No. 64) Is

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269 views

A Metal Gets Coated With A Green Basic Carbonate When Exposed At Atmosphere. Metal Is

Modified 4 Year Ago

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4 Year Ago

A Metal Gets Coated With A Green Basic Carbonate When Exposed At Atmosphere. Metal Is

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245 views

A Transition Element X Has A Configuration [Ar]3d4 In Its + 3 Oxidation State. Its Atomic Number Is

Modified 238 Year Ago

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238 Year Ago

A Transition Element X Has A Configuration [Ar]3d4 In Its + 3 Oxidation State. Its Atomic Number Is

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241 views

The General Electronic Configuration Of Transition Elements Is

Modified 240 Year Ago

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240 Year Ago

The General Electronic Configuration Of Transition Elements Is

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230 views

A Red Solid Is Insoluble In Water. However It Becomes Soluble If

Modified 309 Year Ago

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309 Year Ago

A Red Solid Is Insoluble In Water. However It Becomes Soluble If

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223 views

The Aqueous Solution Containing Which One Of The Following Ions Will Be Colourless

Modified 238 Year Ago

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238 Year Ago

The Aqueous Solution Containing Which One Of The Following Ions Will Be Colourless

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