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401

If 30cm\(^3\) of gas at 50\(^0\)C is warmed to 80\(^0\)C at a fixed pressure, the fractional increase in volume is

  • A. 0.009
  • B. 0.093
  • C. 0.910
  • D. 1.090
View Answer & Discuss (46) JAMB 2006
402

2C\(_2\)H\(_2\)(g) + 5O\(_2\)(g) → 4CO\(_2\)(g) + 2H\(_2\)O(g)
In the reaction above, the mass of carbon(IV)oxide produced on burning 78 g of ethyne is
[C =12, O = 16, H = 1]

  • A. 264 g
  • B. 39 g
  • C. 352 g
  • D. 156 g
View Answer & Discuss (22) JAMB 2006
403

The ion that can be used as an oxidizing agent is

  • A. Au3+
  • B. Fe3+
  • C. ClO-
  • D. Ca2+
View Answer & Discuss (14) JAMB 2006
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404

Trioxonitrate (V) acid is not used for preparing hydrogen gas from metals because it

  • A. is strongly oxidizing
  • B. is volatile
  • C. renders the metal passive
  • D. forms a layer of oxide on the metal
View Answer & Discuss (4) JAMB 2007
405

H\(_2\)(g) + Br\(_2\)(g) → 2HBr(g)
The above reaction is carried out at 25\(^0\)C. ΔH is -72 kJ mol-1 and ΔS is - 106 J mol-1K-1, the reaction will?

  • A. not proceed spontaneously at the given
  • B. proceed spontaneously at the given temperature
  • C. proceed in the reverse direction at the given temperature
  • D. proceed spontenously at lower temperature
View Answer & Discuss (11) JAMB 2006
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