Jamb Chemistry Past Questions For Year 2015
Question 56
Calculate the relative molecular mass of Limestone CaCO3, (Ca = 40, C =12, O = 16)
- A. 56
- B. 100
- C. 76
- D. 90
Question 57
In the electrolysis of brine the anode is
- A. platinum
- B. copper
- C. zinc
- D. carbon
Question 58
The oxidation state of sulphur on H2SO4 acid is
- A. -4
- B. +6
- C. 4
- D. -8
Question 59
S block elements of the periodic table one made up of
- A. groups 1, 2, 3
- B. groups 1, and 2
- C. group 3
- D. group 3 to 7
Question 60
In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by
- A. washing under pressure
- B. drying over phosphorus (V) oxide
- C. passing the mixture to the limewater
- D. using ammonical copper (I) chlorine
