Jamb Chemistry Past Questions and Answers

Question 1941:

• JAMB 2017

The diagram above. Y is

A. Fused CaO
B. H₂O
C. NaOH
D. Concentrated H₂SO₄

Question 1942:

• JAMB 2017

Calculate the mass of copper deposited when a current of 0.5 ampere was passed through a solution of copper(II) chloride for 45 minutes in an electrolytic cell. [Cu = 64, F = 96500Cmol^-1]

A. 0.300g
B. 0.250g
C. 0.2242g
D. 0.448g

Question 1943:

• JAMB 2017

C₃H₅ - COH₃ =CH₂
The IUPAC nomenclature of the structure above is

A. 3-methybut-3-ene
B. 2-methylbut-1-ene
C. 2-ethylprop-1-ene
D. 2-methylbut-2-ene

Question 1944:

• JAMB 2017

The reddish—brown rust on ion roofing sheets consists of

A. Fe³ + (H₂O)₆
B. FeO.H₂O
C. Fe₂O₃.3H₂O
D. Fe₃O₄.2H2₂O

Question 1945:

• JAMB 2017

The densities of two gases, X and Y are 0.5gdm^-3 and 2.0gdm^-3 respectively. What is the rate of diffusion of X relative to Y?

A. 0.1
B. 0.5
C. 2.0
D. 4.0