Jamb Chemistry Past Questions For Year 2020
Question 1
An example of a polysaccharide is?
- A. Dextrose
- B. Mannose
- C. Glucose
- D. Starch
Question 2
Duralumin consists of aluminum, copper?
- A. Zinc and Gold
- B. Lead and Manganese
- C. Nickel and Silver
- D. Manganese and Magnesium
Question 3
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
Question 4
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
Question 5
What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?
- A. Steam distillation
- B. Destructive distillation
- C. Liquefication
- D. Hydrolysis
