WorksheetsFinal Exam:Chemistry Laboratory
Total questions: 50
Worksheet time: 53mins
The hands-on laboratory experiment help learners in terms of .
Design skills
Social skills
Professional skill
All of the above
This attire help minimize the potential skin exposure to hazardous chemicals, biological agents, and their hazardous materials
Proper protective equipment
Laboratory gown
Laboratory goggles
Laboratory gloves
True or false: The main purpose of your laboratory notebook is to be a permanent record of your experiments. During an experiment, you will use it to record data and observations necessary to complete lab reports that explain your results.
True
False
Which of the following is a type of lab where drug chemicals, and other types of biological matter can be analyzed and tested by using various liquids?
Dry lab
Wet lab
Virtual lab
Traditional lab
This type of lab allows students to view and manipulate chemicals at the molecular level in a three-dimensional world
Dry lab
Wet lab
Virtual lab
Traditional lab
is a structured way of communicating the outcomes of your practical work.
Lab report
Lab output
Lab results
Lab paper
Which of the following is NOT included on the safety feature of the laboratory?
Safety shower
Sand box
Medicine cabinet
None of the above
True or false: Short pants and open shoes with socks must be worn in the laboratory at all times
True
False
True or false: Eating, drinking, and smoking are strictly prohibited in the laboratory.
True
False
True or false: Smell directly a substance when observing its odor to get an accurate data
True
False
True or false: Immediately rinse off a chemical that is spilled on your skin with plenty of acid or base
True
False
True or false: Always add the ACID to WATER while stirring the mixture. When mixing acid to water
True
False
Which of the following is INCORRECT about handling solid chemicals?
Always use a clean, dry spatula or spoon
Withdraw only necessary amount of solid chemical and return the excess to the reagent bottle.
The covers of the reagent bottle should NOT interchange
Transfer a solid chemical in a test tube using a folded strip of dry and clean paper
Which of the following is INCORRECT about handling liquid chemicals?
Liquid chemicals are usually stored in glass-stoppered bottles including those that will contain alkaline chemicals.
A clean dry pipet must be used in dispensing liquid chemical.
Use stirring rod to guide the flow of a liquid from one container to another.
Excess liquid should not be returned to the original container.
Which of the following is INCORRECT about heating samples in a test tube?
A test tube holder is used to handle the test tube
In heating liquid, the amount should be not more than half of the capacity of the test tube.
The solid to be heated must be spread along the body of the test tube to avoid breaking of the test tube.
The test tube must be tilted at an angle of 90 degrees with the horizontal and is moved back and forth within the volume occupied by the sample.
True or false: The beaker must be filled NOT more than three-fourths full.
True
False
Which of the following is INCORRECT about measuring volume of a liquid?
Choose the appropriate apparatus in measuring the desired volume of liquid.
Read the lower meniscus of the colorless or slightly colored liquid.
For heavily colored liquids, use the upper meniscus.
Always read the meniscus at below eye level to avoid parallax error.
Which of the following is INCORRECT about measuring temperature of a liquid?
The bulb should be immersed in the liquid and allow to stand until the level of the mercury or alcohol in the capillary tube stops rising.
The bulb must be immersed at the center of the liquid.
DO NOT allow the bulb to touch the container of the liquid which give erroneous reading.
Remove the thermometer from the liquid while reading the temperature.
True or false: Solid chemical should be weighed directly on the pan.
True
False
This is a more common method of separating an insoluble solid from a liquid. An example of such a mixture is sand and water
Evaporation
Filtration
Chromatography
Decantation
This technique is used to separate out homogenous mixtures that contain one or more dissolved salts
Evaporation
Filtration
Distillation
Decantation
This method is best for separating a liquid from a solution. In a way, the concept is similar to evaporation, but in this case, the vapor is collected by condensation
Evaporation
Chromatography
Distillation
Decantation
The separation of a mixture by passing it in a solution or suspension or as a vapor through a medium in which the components move at a different rate
Evaporation
Chromatography
Distillation
Decantation
It is the mass of a unit volume of a material substance
Density
Ductility
Entropy
Enthalpy
Which of the following is the formula of density?
D = m + V
D = m x V
D = m/V
D = V/m
You have a rock with a volume of 15 cm^3 and a mass of 45 g. What is its density?
0.067 g/cm^3
3.00 g/cm^3
60 g/cm^3
675 g/cm^3
Three liquids A, B and C have densities of 0.35 g/mL, 0.45 g/mL and 0.60 g/mL, respectively. When poured together, one liquid floats on top of the others. Which liquid is on top?
Liquid A
Liquid B
Liquid C
Liquid B and C
Which of the following is a chemical property of matter?
Color
Density
Flammability
Hardness
Which of the following illustrate a physical change of matter?
An apple is cut
Milk sours
Wood rots
Food is digested
Which of the following illustrate a chemical change of matter?
A solid is crushed into a powder
A bicycle changes color as it rusts
An ice cube melts under the sun
Alcohol evaporates
True or false: changing the size and shapes of wood would be a chemical change.
True
False
Which of the following could flame test be used for?
To identify metal cations
To identify alkene reactions
To identify metal anions
To identify salt precipitates
To do a flame test you can use a
Yellow flame
Orange-red flame
Copper wire
Nichrome wire
Which of the following explains why different metals produce different colors during flame test?
Each metal has a unique electron configuration
Each metal was isolated from a different place
Each metal has a unique salt bond
Each metal has a unique number of extra electrons
results in a lilac flame.
Potassium ions
Sodium ions
Copper ions
Calcium ions
Alkaline Earth metals belong to what group in the periodic table?
Group 1A
Group 2A
Group 3A
Group 4A
Which of the following is NOT an alkaline earth metal?
Beryllium
Magnesium
Calcium
Potassium
Which of the following is NOT a property of common alkaline earth metals?
Typically malleable
Typically ductile
Low melting point
High boiling point
True or false: Alkaline earth metals are very reactive.
True
False
During a chemical reaction, the substance that react are known as .
Reactants
Products
Chemical
Reagents
A type of chemical reaction wherein two or more compounds combine to form one compound.
Combination reaction
Decomposition reaction
Precipitation reaction
Neutralization reaction
What type of chemical reaction is being illustrated in this general equation: Acid + Base --> Salt + Water
Combustion reaction
Decomposition reaction
Precipitation reaction
Neutralization reaction
What type of chemical reaction is being illustrated in this chemical equation: CH4 + 2O2 --> 2H2O + CO2
Combustion reaction
Decomposition reaction
Precipitation reaction
Neutralization reaction
Which of the following is NOT a characteristic of gases?
Can effuse through small opening
High densities
Kinetic energy is dependent on temperature
Can diffuse in containers
Which gas law demonstrate expansion of container when gas when heated and contract when cooled
Boyle’s law
Charles’ law
Dalton’s law
Gay-Lussac’s law
The air compression experiment illustrates
Boyle’s law
Charles’ law
Dalton’s law
Gay-Lussac’s law
This property refers to the ability to be dissolved, especially in water
Fluidity
Wetness
Polarity
Solubility
True or false: A rule of thumb for solubility in solvents is “like dissolves like”.
True
False
Which of the following is not a colligative property?
Vapor pressure lowering
Boiling point elevation
Osmotic pressure
None of the above
Which factor affects conductivity of a solution?
The concentration of ions
Types of ions
Temperature of solution
All of the above
