Jamb Chemistry Past Questions and Answers

Question 2166:

• JAMB 2020

The most important element on the earth's crust is?

A. Nitrogen
B. Hydrogen
C. Oxygen
D. Fluorine

Question 2167:

• JAMB 2020

To obtain pure carbon(ii)oxide from its mixture with carbon(iv)oxide, the mixture should be?

A. Passed over heated copper(ii)oxide
B. Bubbled through water
C. Bubbled through conc H\(_2\)SO\(_4\)
D. Bubbled through conc NAOH

Question 2168:

• JAMB 2021

The process by which salt and water reacted in a limited way to form an acid or a base is?

A. Neutral process
B. Basic acidic process
C. Hydrolysis
D. Sublimation

Question 2169:

• JAMB 2021

The fourteen elements (atomic number 90-103) after actinium are called?

A. Actinoids
B. Nucleotides
C. Pre-actinum elements
D. Atomic elements

Question 2170:

• JAMB 2021

The molar enthalpy change accompanying the removal of an electron from a gas phase atom or ion in its ground state is called?

A. Electron gain enthalpy
B. Ionization enthalpy
C. Enthalpy change
D. Enthalpic gas removal