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Chemistry Past Questions

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6

If an atom is represented as \( _{11}^{23}X \), which of the following deduction is correct?

  • A. it contains 12 protons
  • B. it forms a covalent chloride
  • C. its atomic number is 23
  • D. it is an alkali metal
View Answer & Discuss (5) JAMB 2009
7

Which quantum number divides shells into orbitals?

  • A. principal
  • B. Arzimuthal
  • C. Magnetic
  • D. Spin
View Answer & Discuss (6) JAMB 2009
8

The type of bonding in \({Cu(NH_3)_4}^2\)+ is?

  • A. coordinate covalent
  • B. electrovalent
  • C. metallic
  • D. covalent
View Answer & Discuss (3) JAMB 2009
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9

The oxidation state of Cr in K\(_2\)Cr\(_2\)O\(_7\) is?

  • A. +7
  • B. +6
  • C. +5
  • D. 4
View Answer & Discuss (1) JAMB 2009
10

10cm3 of CO is mixed and sparked with 100cm3 of air containing 21% O2. If all the volumes measured at S.T.P. the volume of resulting gases would be?

  • A. 90cm3
  • B. 100cm3
  • C. 105cm3
  • D. 110cm3
  • E. 115cm3
View Answer & Discuss (27) JAMB 1980
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