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Brass gets discoloured in air because of the presence of which of the following gases in air?

Hydrogen sulphide

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Graphite most use in?

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which of the following is a non metal that remains liquid at room temperature?

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The moderator commonly used is ___?

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The spherical surface of lens results in _____?

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The gas usually filled in the electric bulb is

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DNA is -

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B.A.R.K. stands for-

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M.O.M. stands for-

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Try These Similar MCQs

Which of these non-metals is commonly used as a general anesthetic?
  • A Helium
  • B Fluorine
  • C Xenon
  • D Tellurium
Which of the following is the essential element for batteries used in electric cars?
  • A Lithium
  • B Sodium
  • C Magnesuium
  • D Bromine
Which of these principles state that in the ground state of the atoms, the orbitals are filled in order of their increasing energies?
  • A Afbau principle
  • B Hund’s rule of multiplicity
  • C Pauli’s exclusion principle
  • D None of the above
The Amino Acid Containing More COOH Groups Than NH2 Are Called 
  • A Basic amino acids
  • B Neutral amino acids
  • C Acidic amino acids
  • D Amphoteric amino acids
Explanation: COOH -  acidic  NH2 - basic
The Fat Soluble Vitamins Are
  • A A,B,D and E
  • B A,C,D and E
  • C A,D,E and K
  • D A,C,D and K
What is the octane number of iso-octane?
  • B 1
  • C 100
  • D 200
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