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951

Which of the following statements about a radioactive substance is/are correct? l. lt emits radiation continuously and spontaneously. ll. The emitted radiations are affected by temperature and pressure III. The radiation can penetrate opaque matter

  • A. ll only
  • B. l and ll only
  • C. l and lll only
  • D. ll and lll only
View Answer & Discuss WAEC 2012
952

Which of the following elements is a metalloid?

  • A. Carbon
  • B. Oxygen
  • C. Silicon
  • D. Sodium
View Answer & Discuss (4) WAEC 2012
953

Which of the following halogens is liquid at room temperature?

  • A. Chlorine
  • B. Fluorine
  • C. lodine
  • D. Bromine
View Answer & Discuss WAEC 2012
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
954

The shape of a graphite crystal is

  • A. tetrahedral
  • B. pyramidal
  • C. hexagonal
  • D. octahedral
View Answer & Discuss (8) WAEC 2012
955

The complex compound formed by the combination of two elements with a large electronegativity difference is likely to be

  • A. polar covalent
  • B. giant molecular
  • C. covalent
  • D. ionic
View Answer & Discuss (1) WAEC 2012
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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