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2811
in any chemical reaction, the total mass of products is always equal to that of the reactants.

This Is statement of the law of:
  • A. conservation of matter.
  • B. Constant composition
  • C. definite proportions.
  • D. multiple proportions.
  • E. reciprocal proportions.
View Answer & Discuss (1) NECO 2001
2812

The alloy used for welding and plumbing contains

  • A. aluminum and copper.
  • B. copper and tin
  • C. iron and aluminum.
  • D. lead and antimony.
  • E. lead and tin.
View Answer & Discuss (1) NECO 2001
2813

Which compound is a product of the hydrolysis of the of CH\(_3\)COOC\(_3\)H\(_7\) with aqueous sodium hydroxide?

  • A. CH3COONa
  • B. CH3COONaCCH3OH
  • C. CH3OH
  • D. C2H5OH
  • E. C3H7COONa
View Answer & Discuss (5) NECO 2001
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2814
On exposure to hydrogen sulphide, moist lead (II) ethanoate paper turns
  • A. black
  • B. blue
  • C. green
  • D. white
  • E. yellow
View Answer & Discuss (2) NECO 2001
2815
The maximum number of electrons that can occupy the shell having a principal quantum number of 3 is
  • A. 3
  • B. 9
  • C. 10
  • D. 18
  • E. 32
View Answer & Discuss (2) NECO 2001
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