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3691

Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas?

  • A. chlorine attacks the starch to give the blue-black color
  • B. chlorine attacks the iodide ion to give the blue-black color
  • C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color
  • D. iodine attacks the starch to give the blue-black color
View Answer & Discuss (3) JAMB 2019
3692

Which of the following is a set of neutral oxides?

  • A. N\(_2\)O, H\(_2\)O, CO
  • B. N\(_2\)O, SO\(_2\), CO
  • C. N\(_2\)O, Na\(_2\)O, ZnO
  • D. N\(_2\)O, SO\(_3\), NO
View Answer & Discuss (5) JAMB 2019
3693

SO\(_3\) is not directly dissolved in water in the industrial preparation of H\(_2\)SO\(_4\) by the contact process because

  • A. SO\(_3\) is an acidic gas
  • B. Acid is usually added to water and not water to acid
  • C. The reaction between SO\(_3\) and water is violently exothermic
  • D. SO\(_3\) does not dissolve readily in water
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3694

Which of the following statements does not show Rutherford's account of Nuclear Theory? An atom contains a region

  • A. which contains protons and neutrons
  • B. which is positively charged
  • C. which is massive and can cause deflection of a few projectiles
  • D. which is very large and in which close to 98% of projectiles pass undeflected
View Answer & Discuss (15) JAMB 2019
3695

Elements X and Y have electronic configurations 1s\(^2\)2s\(^2\)2p\(^4\) and 1s\(^2\)2s\(^2\)2p\(^6\)3s\(^2\)3p\(^1\) respectively. When they combine, the formula of the compound formed is

  • A. XY
  • B. X\(_2\)Y
  • C. Y\(_2\)X\(_3\)
  • D. X\(_2\)Y\(_3\)
View Answer & Discuss (8) JAMB 2019
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