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CIDESCO Exam Prep Questions and Answers 100% Solved

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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...

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  • October 20, 2024
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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
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 of synthetic substances are: - ✔✔plastics and silicones

Examples of organic biological substances are: - ✔✔carbohydrates and

fats

Examples of mineral substances are: - ✔✔paraffins and petroleum

Matter is everything that: - ✔✔occupies space and has weight

The three forms of matter are solids, liquids and: - ✔✔gases

What property does all matter have? - ✔✔All matter has weight

Condensation is the change of matter from: - ✔✔a gas to a liquid

Vapourisation is the change of matter from: - ✔✔liquid to a gas

Melting is the change of matter from: - ✔✔a solid to a liquid

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
Sublimation is the change of matter from: - ✔✔a solid to a gas

Condensation is: - ✔✔the change of a vapour to a liquid

The alteration of the properties of matter without the formation of any new

substance is called a/an: - ✔✔physical change

The immediate change of a solid into a vapour is called: - ✔✔sublimation

An example of a single-celled cellular organism is: - ✔✔a bacterium

I. A micro-organism is the smallest part of the human body. II All micro-

organisms need nutrients for their existence. - ✔✔I is incorrect and II is

correct

Examples of bacteria are: - ✔✔bacilli and cocci

I. Every living organism needs some non-biological substances for it's

existence. II. All non-biological substances are found as minerals in the

earth. - ✔✔I is correct and II is incorrect

Science deals mainly with: - ✔✔physics and chemistry

The study of the structure of the body is called: - ✔✔anatomy

The study of the functions of living organisms is: - ✔✔physiology

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
I Anatomy is a very important science in the field of biology. II Anatomy is

the science which deals with the functions of the human body. - ✔✔I is

correct and II is incorrect

I Physiology is a very important science in the field of biology. II Physiology

is the science which deals with the functions of the body. - ✔✔I and II are

both correct

Which one of the following belongs to the science of chemistry? - ✔✔The

alteration of the structure of molecules

I Chemical reactions only take place outside and not inside a living

organism. II The structure of molecules change during chemical reactions. -

✔✔I is incorrect and II is correct

The field of physics includes: - ✔✔heat and electricity

Which one of the following belongs to the field of physics? - ✔✔Sound,

electricity and heat

The field of physics includes: - ✔✔the science of electricity

An anion is: - ✔✔A negatively charged atom

An anion is: - ✔✔a negatively charged chloride atom (CI-)

A cation is: - ✔✔A positively charged sodium atom (Na+)

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
An electrolyte is: - ✔✔A substance which, dissolved in water, splits into

ions

Examples of electrolytes are: - ✔✔acids and salts

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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