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Chemistry Past Questions

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6

The times taken for iodine to be liberated in the reaction between sodium thiosulphate and hydrochloric acid at various temperature are as follows. These results suggest that

  • A. for a 10o rise in temperature, rate of reaction is double
  • B. for a 10 o rise in temperature, rate of reaction is halved
  • C. time taken for iodine to appear does not depend on temperature
  • D. for a 10 o rise in temperature rate of reaction is tripled
View Answer & Discuss (24) JAMB 1987
7

In the diagram above, R is a mixture of?

  • A. potassium tetraxochlorate (VII) and concentrated H2SO4
  • B. potassium trioxochlorate (V) and concentrated H2SO4
  • C. potassium tetratoxomanganate (VII) and concentrated HCI
  • D. manganese (IV) oxide and concentrated HCI
View Answer & Discuss (37) JAMB 1994
8

Which of the following arrangements shows increasing order of reactivity of the halogens?

  • A. F2 > Cl2 > Br2 >I2
  • B. I2 < Br2 < Cl2< F2
  • C. F2 < Cl2 < Br2< I2
  • D. I2 > Br2 > Cl2 > F2
View Answer & Discuss (21) WAEC 2016
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9

Which of the following is a non-metal that remains liquid at room temperature?

  • A. Chlorine
  • B. Phosphorus
  • C. Bromine
  • D. Helium
View Answer & Discuss (3) JAMB 2021
10

The reactivity of fluorine is due to?

  • A. its high electro negativity
  • B. small size of fluorine atom
  • C. availability of D-orbitals
  • D. strong f-f bond
View Answer & Discuss (2) JAMB 2021
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