Chemistry MCQs with answers Page - 1

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Q. Which of the following phenomenon is considered responsible for Global Warming?

  • (A) Greenhouse effect
  • (B) Fire in coal mines
  • (C) Dry farming
  • (D) Monsoon

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Q. The nucleus of an atom consists of

  • (A) electrons and neutrons
  • (B) electrons and protons
  • (C) protons and neutrons
  • (D) All of the above

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Q. The number of moles of solute present in 1 kg of a solvent is called its

  • (A) molality
  • (B) molarity
  • (C) normality
  • (D) formality

A

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Q. The most electronegative element among the following is

  • (A) sodium
  • (B) bromine
  • (C) fluorine
  • (D) oxygen

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Q. The metal used to recover copper from a solution of copper sulphate is

  • (A) Na
  • (B) Ag
  • (C) Hg
  • (D) Fe

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Q. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

  • (A) p-electrons in Ne(Z = 10)
  • (B) s-electrons in Mg(Z = 12)
  • (C) d-electrons in Fe(Z = 26)
  • (D) p-electrons in CI(Z = 17)

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Q. The metallurgical process in which a metal is obtained in a fused state is called

  • (A) smelting
  • (B) roasting
  • (C) calcinations
  • (D) froth floatation

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Q. The molecules of which gas have highest speed?

  • (A) H2 at -73oC
  • (B) CH4 at 300 K
  • (C) N2 at 1,027oC
  • (D) O2 at 0oC

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Q. The most commonly used bleaching agent is

  • (A) alcohol
  • (B) carbon dioxide
  • (C) chlorine
  • (D) sodium chlorine

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Q. The nucleus of a hydrogen atom consists of

  • (A) 1 proton only
  • (B) 1 proton + 2 neutron
  • (C) 1 neutron only
  • (D) 1 electron only

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