Basic Chemistry Questions & Answers

11. Which among the following scientists had discovered Radium?
[A]Marie Skłodowska-Curie and Pierre Curie
[B]André-Louis Debierne
[C]Kasimir Fajans
[D]Oswald Helmuth Göhring

Marie Skłodowska-Curie and Pierre Curie


12. Which among the following would cause the bright red colur due to bursting of crackers?
[A]Strontium
[B]Sodium
[C]Sulphur
[D]Magnesium

Strontium


13. Which among the following elemtns are generally find in free state?
[A]Group 11 elements
[B]Group 12 elements
[C]Group 13 elements
[D]Group 14 elements

Group 11 elements


14. Which among the following is an example of a Chemical Change?
[A]Rusting of iron
[B]Magnetisation of iron
[C]Melting of iron
[D]Heating of iron

Rusting of iron


15. The most important contributor of sea salt is ____?
[A]Rivers
[B]Salty Rocks at bottom of sea
[C]Aquatic animals in Sea
[D]Atmosphere around sea

Rivers


16. Which among the following is the most abundant organic compound in nature?
[A]Glucose
[B]Fructose
[C]Sucrose
[D]Cellulose

Cellulose


17. Which among the following is the objective of the Methyl tert-butyl ether (MTBE) mixing with Petroleum?
[A]Raise Octane Number
[B]Antioxidant Stabilizer
[C]Lead Scavanger
[D]Fuel Dye

Raise Octane Number
MTBE is a gasoline additive, used as an oxygenate to raise the octane number. Its use is controversial in the US and declining in that country in part
because of its occurrence in groundwater and legislation favoring ethanol.


18. When a tubelight breaks, a cracking sound is produced because ____?
[A]Pressure inside the lamp is less than atmospheric pressure
[B]Pressure inside the lamp is more than atmospheric pressure
[C]The lamp is filled with reactive gases
[D]The lamp is filled with mercury vapour

Pressure inside the lamp is less than atmospheric pressure
A fluorescent lamp tube is filled with a gas containing low pressure mercury vapor and argon, xenon, neon, or krypton. The pressure inside the lamp is
around 0.3% of atmospheric pressure.


19. In the manufacture of Vanaspati ghee from vegetable oils, which among the following gas is used?
[A]N2
[B]CO2
[C]H2
[D]Ne

H2


20. In which among the following categories, Radon (Rn) can be placed?
1. Radioactive Element
2. Inert Gas
3. Noble Gas
Choose the correct option:
[A]Only 1
[B]1 & 2
[C]2 & 3
[D]1, 2 & 3

1, 2 & 3

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Comments

  • sandeep
    Reply

    gud work but need some more thankyou gk today

  • KALAICHELVAN . A
    Reply

    Very Good . Please publish SCIENCE related in zoology, Botany , Physics with life science question and answer

  • Pradeep
    Reply

    Sir, could you please explain, how rivers contribute more to the sea salt ?

  • Manoj Banga
    Reply

    GOOD WORK BUT GIVE SOME MORE QUES,

  • dhandapani
    Reply

    plz explain how rivers are the major reason for sea salt.

  • mohamed
    Reply

    its good work

  • anirban sanki
    Reply

    its good work