Chemistry 2020 JAMB Past Questions

Change Subject Ask Question Check Syllabus Download App My Bookmarks

1

The electronic configuration of an element is 1S\(^2\) 2S\(^2\) 2P\(^6\) 3S\(^2\) 3P\(^3\). How many unpaired electrons are there in the element?

  • A. 5
  • B. 4
  • C. 3
  • D. 2
View Answer & Discuss (1) JAMB 2020
2

Which of the following can be obtained by fractional distillation? 

  • A. Nitrogen from liquid air
  • B. Sodium Chloride from sea water
  • C. Iodine from solution of Iodine in carbon tetrachloride
  • D. Sulphur from the solution of sulphur in carbon disulphide
View Answer & Discuss (1) JAMB 2020
3

Duralumin consists of aluminum, copper?

  • A. Zinc and Gold
  • B. Lead and Manganese
  • C. Nickel and Silver
  • D. Manganese and Magnesium
View Answer & Discuss JAMB 2020
4

An example of a polysaccharide is?

  • A. Dextrose
  • B. Mannose
  • C. Glucose
  • D. Starch
View Answer & Discuss JAMB 2020
5

8g of CH\(_4\) occupies 11.2 at S.T.P. What volume would 22g of CH\(_3\)CH\(_2\)CH\(_3\) occupy under the same condition?

  • A. 3.7dm\(^3\)
  • B. 11.2dm\(^3\)
  • C. 22.4dm\(^3\)
  • D. 33dm\(^3\)
View Answer & Discuss JAMB 2020