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CIDESCO questions and answers} (2022/2023) (verified answers)
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CIDESCO questions and answers} (2022/2023) (verified answers)
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CIDESCO Practice Exam 2023 Questions and Answers1.Characteristics of life include>>>>Growth and metabolism
2.Example of organic biological substances are>>>>Carbohydrates and fats
3.Examples of mineral substances are>>>>Paraffin's and petroleum
4.Matter is everything that>>>>Occupies space and has weight
5.What property does all matter have?>>>>All matter has weight
6.Sublimation is the change of matter from>>>>A solid to a gas
7.The alternation of the properties of matter without formation of any new substances is called?>>>>Physical change
8.The immediate change of a solid into vapour is called?>>>>Sublimation
9.An example of a single called cellular organism is?>>>>A bacterium
10.Examples of bacteria are? >>>>Bacilli and cocci .Which of the following belongs to the science of chemistry?>>>>The alterna- tion of the structure of molecules
12.An electrolyte is?>>>>A substance which, dissolved in water and splits into ION's
13.Example of electrolytes are?>>>>Acids and salts
14.An example of an electrolyte is?>>>>Salt solution
15.An acid is an electrolyte because?>>>>It can conduct an electrical current
16.An example of an inorganic acid is?>>>>Sulphuric acid
17.An alkali must contain?>>>>Metal atoms and hydroxyl groups
18.If metal oxide is dissolved in water it forms?>>>>An alkali
19.PH can be decreased by?>>>>Increasing hydrogen ions
20.pH is?>>>>The number of free H ions in a solution
21.The pH of the skins acid mantle is? >>>>5.5
22.A characteristic of a weak acid is that it?>>>>Supports the natural pH of the skin
23.A characteristic of organic acids is that?>>>>They contain the element carbon
24.Organic acids are found in?>>>>Sebum and plants
25.An organic acid contains the chemical group?>>>>COOH
26.When do the electrodes in electrotherapy have to be moistened or to be applied on moistened skin? >>>>In iontophoresis and not short wave diathermy
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