Chemistry - Questions and Answers, General Study (GK)

Home » General Study » Chemistry - Questions and Answers Objective Questions

Chemistry - Questions and AnswersPage 25

241.

German silver is an alloy of

(a)Gold and silver

(b)Copper and silver

(c)Copper, Zinc and silver

(d)Copper, Zinc and nickel

Comment

Answer is: DNA

242.

Salts of which of the following elements provide colours to fireworks?

(a)Zinc and sulphur

(b)potassium and mercury

(c)Strontium and barium

(d)Chromium and nickel

Comment

Answer is: CNA

243.

Hard steel contains

(a)2 to 5% carbon

(b)0.5 to 1.5% carbon

(d)0.01 to 0.04% carbon

Comment

Answer is: BNA

244.

Why do alkali metals impart colour to the flame?

(a)They are electropositive elements

(b)They have low ionisation energies

(c)They belong to IA group

(d)They form ionic compounds

Comment

Answer is: BNA

245.

Which can be reduced to metal on heating in a stream of hydrogen?

(a)Al₂O₃

(b)CaO

(c)CuO

(d)K₂O

Comment

Answer is: CNA

246.

Which of the following alkaline earth metal is used in manufacture of aeroplane parts?

(a)Se

(b)Ca

(c)Mg

(d)Be

Comment

Answer is: CNA

247.

Solvay process converts which of the following into soda ash?

(a)Brine

(b)Caustic soda

(c)Sodium oxide

(d)Sodium bicarbonate

Comment

Answer is: DNA

248.

The first metal used by man was

(a)Gold

(b)Silver

(c)Copper

(d)Iron

Comment

Answer is: CNA

249.

Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

(a)Lithium and mercury

(b)Lithium and osmium

(c)Aluminium and mercury

(d)None of the above

Comment

Answer is: BNA

250.

Monazite is an ore of

(a)Zirconium

(b)Thorium

(c)Titanium

(d)Iron

Comment

Answer is: BNA

Comments

No comment yet.

Chemistry - Questions and AnswersPage 25

Comments

Similar GS Topics

Top 10 List

Miscellaneous

Follow us on YouTube

Links

Social links

For Coaching Class/Schools

Subscribe for updates