Chemistry Practice Tests – Atomic Structure and Chemical Combination


Hello and Welcome to Chemistry Practice Tests – Atomic Structure and Chemical Combination

  1. You are to attempt 5 random objectives questions ONLY.
  2. Supply Your Full Name and Location in the text box below and begin immediately.
  3. You can attempt as many times as possible


Calcium hydroxide is added in the treatment of town water supply to ______ (JAMB 1989)

A. kill bacteria in the water
B. facilitate coagulation of organic particles
C. facilitates sedimentation
D. improve the taste of the water


The ions X and Y are isoelectronic, each containing a total of 10 electrons. How many protons are ¡n the nuclei of the neutral atoms of X and Y respectively? (JAMB 1991)

A. 10 and 10
B. 9 and 9
C. 11 and 9
D. 9 and 11


NH4 is formed from NH3 and H by _______ (WASSCE)

(a) covalent bonding.     (b) dative bonding.     (c) hydrogen bonding.     (d) ionic bonding



The line observed in the simple hydrogen spectrum are due to emission of ______ (JAMB 1998)

A. electrons from the atom
B. energy by proton transition
C. energy by electron transition
D. neutrons from the atom.


 



error: Content is protected !!