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WorksheetsFirst Periodical Test in General Chemistry
Total questions: 41
Worksheet time: 1hrs 10mins
Area or sphere is referred as ___________.
Science
Consumer Products
Field
Composition
What do you call the goods that are bought for consumption by the average consumer?
Science
Consumer Products
Field
Composition
_____ is the amount that has to be paid to buy something.
Cost
Consumer products
Science
Composition
____ refer to the body of knowledge.
Cost
Consumer products
Science
Composition
____ refers to the ingredients or constituents.
Cost
Consumer products
Science
Composition
A heterogeneous mixture can be separated by all of the following methods EXCEPT ____ .
filtration
decantation
distillation
mechanical separation
To get salt out of a solution, we could use ____.
filtration
decantation
distillation
mechanical separation
Mary wants to get the iron filings out of some fine sand, what could be used to separate these two solids?
Magnet
Evaporation
Sieve
Decantation
Condensing means transforming from gas to _____.
solid
gas
liquid
plasma
If I pour the water off after I boil the banana, this method is an example of _____.
filtration
decantation
distillation
mechanical separation
Uranium-235 has 92 protons. How may neutrons do it have?
143
92
235
90
What are isotopes?
Atoms that have the same number of neutrons but have different numbers of protons.
Atoms that have the same number of electrons but have different numbers of protons.
Atoms that have the same number of protons but have different numbers of neutrons.
Atoms that have the same number of neutrons and protons.
Uranium-238 has 92 protons. How many neutrons does it have?
239
92
146
330
Why is deuterium 2H1 sometimes called heavy hydrogen?
It has extra nucleus
It has extra proton
It has extra electron
It has extra neutron
The beta particle has a charge of ___
-1
-2
+1
+4
In preparing coffee using the Barako coffee beans, you may pour the boiled coffee mixture into a piece of cloth. Which method is being illustrated?
Filtration
Decantation
Distillation
Mechanical separation
Which of the following mixtures could NOT be used in separating the components of mixtures through decantation?
Quail egg in hot water
Sugar in hot water
Sand in glass of water
Utensils in warm water
Which of these methods could be used to separate an insoluble solid from a soluble solid?
Mixing the mixture with water and then filtering it. Then evaporate the water from the resulting liquid.
Mixing the mixture with sand and then filtering it. Then evaporate the sand from the resulting solid
Mixing the mixture with hydrogen gas and then filtering it. Then evaporate the solids out.
None of the above.
Which method uses the boiling point differences by gradually heated a mixture? The substance that vaporize the easiest will separate first.
Filtration
Decantation
Distillation
Mechanical separation
A coffee filter is used to separate coffee liquid from ground, this is a suitable example of ____.
filtration
distillation
decantation
mechanical separation
The amount that has to be paid to buy something.
Consumer Products
Technology
Cost
Composition consumption by the average consumer
Field
Refers to ingredient or constituent
Consumer Products
Technology
Cost
Composition consumption by the average consumer
Field
These are goods that are bought for
Consumer Products
Technology
Cost
Composition consumption by the average consumer
Field
Refers to an area or a sphere
Consumer Products
Technology
Cost
Composition consumption by the average consumer
Field
Application of Science
Consumer Products
Technology
Cost
Composition consumption by the average consumer
Field
(a) is a chemical decomposition of breakdown produced by passing an electric current through a liquid or solution containing ions.
(a) involves the use of forceps, sieves and other similar tools to separate the components of mixtures.
(a) is a process that involves the evaporation and condensation of volatile liquids. The more volatile liquid in the mixture boils first, evaporates, then condenses.
(a) is a method used to separate liquid and a heavy insoluble solid like soil by allowing the solid to settle at the bottom of the container then the liquid above the solid is poured off carefully into another container.
(a) is the process of separating the insoluble solid from the liquid substance by allowing the liquid to pass through a porous material called filtering agent.
The chemical formula of carbon tetrahydride is (a) .
There is/are (a) hydrogen atom/s present in this chemical formula NH3.
The chemical name of NO3 is (a) .
Cl is the chemical symbol for (a) .
The chemical formula of Carbon tetraoxide is (a) .
Write the chemical formula of the compound in each item given its chemical name or vice-versa.
CO
(a)
Write the chemical formula of the compound in each item given its chemical name or vice-versa.
MgCl2
(a)
Write the chemical formula of the compound in each item given its chemical name or vice-versa.
NO2
(a)
Write the chemical formula of the compound in each item given its chemical name or vice-versa.
Nitrogen trichloride
(a)
Write the chemical formula of the compound in each item given its chemical name or vice-versa.
Calcium oxide
(a)
Problem Solving (10 pts.)
IONIC COMPOUND – Iron Oxide
Step 1 (Atoms involved) -
Step 2 (Chemical symbol) -
Step 3 (Formed Ion) -
Step 4 (Criss-cross multiply the charges) -
Step 5 (Remove the plus sign to determine the chemical formula) -
(a)
