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Chemistry 1997 JAMB Past Questions

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6
The electron configuration of two elements with similar chemical properties are represented by?
  • A. 1s22s22p5 and 1s22s22p4
  • B. 1s22s22p4 and 1s22s22p63s1
  • C. 1s22s22p63s1 and 1s22s1
  • D. 1s22s22p4 and 1s22s1
View Answer & Discuss (9) JAMB 1997
7
In the periodic table, what is the property that decreases along the periodic and increases down the group?
  • A. Atomic number
  • B. Electron affinity
  • C. Ionization potential
  • D. Atomic radius
View Answer & Discuss (10) JAMB 1997
8
Two elements, P and Q with atomic numbers 11 and 8 respectively , combine chemically to form the compound PxQY. The respective values of x and y are?
  • A. 1 and 1
  • B. 1 and 2
  • C. 2 and 1
  • D. 3 and 1
View Answer & Discuss (5) JAMB 1997
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9

Oxygen is a mixture of two isotopes 16-O and 18-O with relative abundances of 90% and 10% respectively. The relative atomic mass of oxygen is?

  • A. 16.0
  • B. 16.2
  • C. 17.0
  • D. 18.0
View Answer & Discuss (2) JAMB 1997
10

If 30cm\(^3\) of oxygen diffuses through porous plug in 7s, how long will it take 60 cm\(^3\) of chlorine to diffuse through the same plug?

  • A. 12s
  • B. 14s
  • C. 21s
  • D. 30s
View Answer & Discuss (21) JAMB 1997
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