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Chemistry Past Questions

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4641

Electron configuration of Chlorine atom is 

  • A. 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^5\)
  • B. 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^4\)
  • C. 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^6\)
  • D. 1S\(^2\)2S\(^2\)2P\(^5\)3S\(^2\)3P\(^6\)
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4642

A table in which metals are arranged in series according to their comparative tendencies to give up their valence electrons is 

  • A. periodic table
  • B. electrochemical series
  • C. table of elements
  • D. periodicals
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4643

An importance of solubility is that it

  • A. determines the amount of solute that can dissolve in a given amount of solvent
  • B. lowers the vapour pressure of the liquid
  • C. enables us to know the chemical reactions of the gas with the liquid
  • D. raises the boiling point of liquid
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4644

The disintegration of radioactive phosphorus to silicon follows the first order kinetics with rate constant k\(_1\) = 3.85 x 10\(^{-3}\). Determine the half life of phosphorus.

  • A. 8 s
  • B. 180 s
  • C. 80 s
  • D. 100 s
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4645

The above structure is 

  • A. alkylamine
  • B. alkanone
  • C. alkanamide
  • D. amino acid
View Answer & Discuss (8) JAMB 2025
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