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BSC1010l MIDTERM PRACTICAL (pbsc) Questions and Answers 100% Solved
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BSC1010l MIDTERM PRACTICAL (pbsc)
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BSC1010l MIDTERM PRACTICAL (pbsc)Inductive reasoning - answer specific to general
Deductive reasoning - answer general to specific
Independent variable - answer variable that is manipulated
Dependent variable - answer variable is the variable being tested and measured in a
scientific experiment
Significant figures - answer All the digits that can be known precisely in a measurement,
plus a last estimated digit
Fahrenheit to Celsius - answer(32°F − 32) × 5/9 = 0°C
Celsius to Fahrenheit - answer(0°C × 9/5) + 32 = 32°F
Blow out pipette - answerThe double rings on the upper end of pipette indicate that the
pipette
Delivery pipette - answerthe delivered quantity of liquid corresponds to the capacity
printed on the pipette
Tare - answera deduction from the gross weight of a substance and its container made
in allowance for the weight of the container
Balance beam - answerscales do not measure weight, instead they value mass
Electronic - answerscales determine the weight of an object
Meniscus - answera lens that is convex on one side and concave on the other
Accuracy - answerrefers to the closeness of a measured value to a standard or known
value
Presicion - answerrefers to the closeness of two or more measurements to each other
Anthocyanins - answerare the pigments that give red, purple, and blue plants their rich
coloring
, Strong acids - answerExample of ____ are hydrochloric acid , perchloric acid , nitric
acid and sulfuric acid
Weak acids - answerExample of ____ are acetic acid (vinegar), lactic acid, citric acid,
and phosphoric acid
Weak bases - answerExample of ____ are Ammonia, Diethylamine, and Methylamine
Strong bases - answerExample of ____ are Barium hydroxide, Calsium hydroxide,
Lithium hydroxide and Sodium hydroxide
Milk - answerPh of ____ is 6.0
Aspirin - answerPh of ____ is 3.5
Ammonia - answerPh of ____ is 11
Distilled white vinegar - answerPh of ____ is 2.4
Protein - answeris an important building block of bones, muscles, cartilage, skin, and
blood
Lipids - answerstoring energy, signaling, and acting as structural components of cell
membranes
Carbohydrates - answerBroken down to glucose to provide energy.
100 mL volumetric flask - answerWhat is the most accurate method of measuring 100
ml of water?
Benedict's test - answerTest for reducing sugars positive result include blue to green/
yellow to reddish-orange
Lugol's reagent - answertest for starch
positive result includes dark blue to black precipitate
Negative results- yellow
Biruet's Test - answertest for proteins
Grease spot - answerTests for fats; appears translucent
Coagulation - answerthe action or process of a liquid, especially blood, changing to a
solid or semi-solid state
Sudan IV - answertest for fats; changes to floating red droplets or a layer
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