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WorksheetsInorg&Org Chemistry LAB
Total questions: 50
Worksheet time: 50mins
Normal, clean rain water has a pH value of between 5.0 - 5.5, which is slightly acidic. When rain combines with sulfur dioxide or nitrogen oxides, usually as by- product from power plants and automobiles, the rain becomes?
Much more basic.
Much more acidic.
Less acidic.
Less basic
Which of the following is the possible pH of bottled water?
pH 2.5 - 3.5
pH 4.5 - 5.5
pH 6.5 - 7.5
None of the above
Blood has a normal pH range of about?
pH 7.0 - 7.1
pH 7.35 - 7.45
pH 6.50 - 7.50
pH 5.50 - 6.50
Oil can be drained off water after letting an oil and water mixture settle for awhile. The water and oil can be separated by using the following laboratory apparatuses EXCEPT:
Test Tube Holder
Beaker
Funnel
Flask
In Chemistry, pH is referred to as?
The potential of Hydrogen
Logarithmic scale used to know the acidity and basicity of aqueous solutions.
Acidity and basicity of solutions
All of the above
The acidity and basicity of solutions can be measured using indicators, which change in color depending on the pH of solution they are in.
True
False
Have no idea
The state of matter which adapts to the shape of its container but varies only slightly in volume.
Plasma
Gas
Liquid
Solid
A separation technique used in mixtures by passing it in solution or suspension or as a vapor through a medium in which the components move at different rate.
Centrifugation
Chromatography
Decantation
Filtration
The lanoratory tehcnique #3, can be used as an analytical tool, feeding its output into a detector that reads the contents of the mixture, and also a purification tool, separating the components of a mixture for use in other experiments or procedures.
Centrifugation
Chromatography
Filtration
Sublimation
A laboratory technique wherein solid particles ina liquid or gaseous fluid are removed by the use of a filter medium that permits the fluid to pass through but retains the solid particles.
Distillation
Chromatography
Filtration
Evaporation
To better understand the laboratory technique in #5, consider the following processes that use filters. Which of the following DOES NOT dictate as an example of the technique?
You can use filters for air conditioners.
Your water taps have screen.
You cam see inside the vacuum cleaner a layer to sift off dust.
You boil water in a casserole.
The measurement of alkalinity and pH is needed to determine the corrosivity of the water. The pH of pure water is?
pH 10
pH 8
pH 7
pH 4
The pH of most drinking water lies within the range pH 6.5 - 8.5. Natural waters can be of lower pH, as a result of, for example, acid rain or higher pH in limestone areas. Which of the following is the possible pH of your gastric juice?
pH 2
pH 7
pH 10
pH 14
The U.S Environmental Protection Agency recommends that the pH level of water sources should be between pH_______ on a scale that ranges from 0 - 14
pH 1.5 - 3.5
pH 2.5 - 3.5
pH 6.5 - 8.5
pH 7.5 - 9.5
Term for the electrons that are farthest from the nucleus; help atoms bond with other atoms.
Valence
Form
Atomic
Neutral
Which of the following is used to measure solid chemicals in the laboratory?
Beaker
Graduated Cylinders
Pipet
Beam Balance
Which of the followingis the color of the flame manifested by Copper?
Reddish
Violet
Green
Pink
Term for substances with only one type of atom.
Protons
Neutrons
Elements
Compound
Type of element that is malleable, polishes to a luster, conducts heat and electricity, and tends to lose electrons in a chemical reaction.
Metals
Metalloids
Non - metal
Halogens
A physical property of an element which refers to its ability to dissolve in another substance.
Ductility
Luster
Density
Solubility
An element with properties of both metals and non metals.
Metals
Non Metals
Metalloids
Halogens
A physical property of an element which refers to the ability to be pulled or shaped into wire.
Ductility
Conductance
Freezing Point
Solubility
A physical property of an element which refers to how shiny a material is.
Ductility
Density
Luster
Boiling point
Refers to the temperature at which a liquid becomse a solid.
Boiling point
Freezing point
Compressible
Ductility
Term for the mass per volume?
Volume
Mass
Density
Gravity
The physical properties of a substance can be used to identify the substance, because:
A. At any given location, the physical properties of a substance do not change.
B. Each substance has a unique set of physical properties.
C. Each substance has the no fixed ratios of atoms.
A and B
A, B, & C
The classmate of yours is trying to describe a material to you. Which of the following is NOT a description of a physical property of the substance?
When dry ice combined with water is fizzes.
The brass buckle in his uniform shines.
The water from the jug was placed in a cup and the juice powder mixed as he stir.
None of the above.
There are substances that possess high melting point, exhibit luster, and malleability. Which of the following can be used to describe a material that is ductile, conducts electricity and is magnetic?
Halogens
Metals
Non metals
Metalloids
Powdered sulfur and iron fillings are mixed together. What physical property could be use to separate them?
Density
Solubility
Magnetism
Ductility
Term for two or more atoms joined together; the smallest unit of many susbtance?
Quark
Elements
Molecule
Protons
Term for anything that has mass and a volume.
Molecule
Atom
Matter
Compound
The amount of matter in an object.
Mass
Volume
Density
Width
The amount of space an object takes up.
Mass
Volume
Matter
Quarks
Formula to calculate volume of arectanular wood.
L x W x H
L x W
L x W x H x D
All of the choices
How do we measure volume for irregularly shaped objects?
Using a graduated cylinder
Water displacement
All of the choices
None of the choices
The ratio of mass to volume. Every object has this parameter.
Volume
Length
Density
Mass
Which of the following is/are examples of chemical change?
Burning of wood
Cooking of food
Rusting of iron
All of the above
Which of the following is/are examples of physical change?
Freezing
Boiling
Evaporation
All of the above
What is the boiling point of water?
10 degrees Celsius
100 degrees Celsius
1000 degrees Celsius
10000 degrees celsius
What is the freezing point of water?
20 degrees Celsius
15 degrees Celsius
10 degrees Celsius
0 degrees Celsius
What is the SI unit to describe mass?
Liters
Milliliters
Grams
Meters
Which of the following is/are SI unit used to describe Volume?
Centimeters cubed
Milliliters Cubed
Liters
All of the above
What is the correct formula to compute the Density of an object?
D= M/V
D= L/M
D= W x W
D= LxWxH
What is the density of water?
100 g/ml
50 g/ml
10 g/ml
1 g/ml
What is the tool that you can use to measure the mass of an object?
Analytical Balance
Triple beam balance
Beam Balance
All of the choices
What is the method use to measure the volume of an irregular solid like a rock or a small pebble?
Volumetric pipette
Displacement method
Beaker
Erlenmeyer Flask
Which of the following is the symbol for Nitrogen?
Nt
Ng
N
No
In a flame test, what will the Barium ions manifest?
Yellow
Orange
Blue
Pale yellow green
When you use Potassium Chloride for your Flame test, what will the potassium ions manifest?
Orange
Blue
Pink - violet
Green
What will be the color of the flame when you use Lithium Chloride Salt?
Scarlet red
Blue
Yellow
Orange
