CIDESCO Exam Prep Questions and Answers 100% Solved
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Course
Cidesco
Institution
Cidesco
CIDESCO Exam Prep Questions and
Answers 100% Solved
I Biological and non-biological substances both need oxygen for their
existence. II The human body consists only of biological substances. - I
is correct and II is incorrect
Characteristics of life include: - growth and metabolism
Examples o...
An example of an electrolyte is: - ✔✔salt-solution
An acid is an electrolyte because: - ✔✔it can conduct an electric current
An example of an inorganic acid is: - ✔✔sulphuric acid
An alkali must contain: - ✔✔metal atoms and hydroxyl group(s) (OH)
An example of an alkaline substance is: - ✔✔soap
If a metal-oxide is dissolved in water it forms: - ✔✔an alkali
The pH scale is used to measure the degree of acidity or: - ✔✔alkalinity
pH can be decreased by: - ✔✔increasing hydrogen-ions
The letter p in pH means: - ✔✔potential
pH is: - ✔✔the number of free H-ions in solution
If the pH of a solution is between 5 and 7, the solution is a: - ✔✔weak acid
If the pH of a solution is between 1 and 3 the solution is a: - ✔✔strong acid
If the pH of a solution is between 7 and 9 the solution is a: - ✔✔weak alkali
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