General Knowledge - 24

1. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

a) Krypton
b) Helium
c) Xenon
d) Argon
e) None of the above 

  Answer: b

2. Potassium nitrate is used in

a) Glass
b) Medicine
c) Fertiliser
d) Salt
e) None of the above 

  Answer: c

3. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

a) Bromine
b) Sulphur
c) Chlorine
d) Fluorine
e) None of the above 

  Answer: b

4. Which is the most populous city in the world?

a) Britain
b) New york
c) China
d) Tokiyo
e) None of these 

  Answer: d

5. What now-ubiquitous device was invented by Zenith engineer Eugene Polley in 1955?

a) Remote control
b) Microwave oven
c) Calculator
d) VCR
e) None of the above 

  Answer: a

6. What item of apparel was invented by Ellery Chun, a Hawaiian clothing merchant, in 1931?

a) String bikini
b) Aloha shirt
c) Capri pants
d) Muumuu
e) None of the above 

  Answer: b

7. Which of the following is not an isotope of hydrogen?

a) Tritium
b) Yttrium
c) Protium
d) Deuterium
e) None of the above 

  Answer: b

8. Who invented the phonograph?

a) John Kruesi
b) Thomas Edison
c) Jules Levy
d) Sir Alexander Graham Bell
e) None of the above 

  Answer: a

9. What Henry Bessemer invented?

a) Steel rolling mill
b) Steel Converter
c) Electroplating
d) Aluminum
e) None of the above 

  Answer: b

10. Quartz crystals normally used in quartz clocks etc. is chemically

a) Sodium silicate
b) Silicon dioxide
c) A mixture of germanoxide and silicon dioxid
d) Germanium oxide
 
  Answer: b