Chemistry - Questions and Answers, General Study (GK)

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Chemistry - Questions and AnswersPage 23

221.

The ultra-pure metal is obtained by

(a)Calcination

(b)Sublimation

(c)Zone refining

(d)None of these

Comment

Answer is: CNA

222.

Which one among the following metals is used for making boats because it does not corrode by sea water?

(a)Tungsten

(b)Antimony

(c)Nickel

(d)Titanium

Comment

Answer is: DNA

223.

Why are stainless steel cooking pans fabricated with copper bottom?

(a)Copper is cheaper

(b)Conductivities of copper is more than the stainless steel

(c)Copper increases durability of the cooking pan

(d)Copper is a good reflector of heat

Comment

Answer is: BNA

224.

Which is used in Storage batteries?

(a)Cu

(b)Lead

(c)Tin

(d)Zinc

Comment

Answer is: BNA

225.

Wrought iron is

(a)Iron mixed with 0.1 to 0.2% carbon

(b)Cast iron

(c)Alloy of steel

(d)Impure sulphide mineral

Comment

Answer is: ANA

226.

The iron obtained from blast furnace is

(a)Soft iron

(b)Pig iron

(c)Steel

(d)Wrought iron

Comment

Answer is: BNA

227.

Stainless steel contains

(a)Fe + Cr + Ni

(b)Fe + Ni + Cu

(c)Fe + Cr + Cu

(d)Fe + C + Ni

Comment

Answer is: ANA

228.

Which of the following is not an ore?

(a)Malachite

(b)Calamine

(c)Stellite

(d)Cerussite

Comment

Answer is: CNA

229.

Which one of the following id known as salt peter?

(a)NaCl

(b)KNO₃

(c)Na₂CO₃

(d)NaHCO₃

Comment

Answer is: BNA

230.

In the metallurgy of iron, when CaCO₃ is added to blast furnace , calcium iron appears as

(a)CaO

(b)Metallic Ca

(c)Gangue

(d)Slag

Comment

Answer is: DNA

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Chemistry - Questions and AnswersPage 23

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