Reviewer for SHS General Chemistry, Exercises of Chemistry

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Properties of Matter

A. Classification. Categorize the following properties of matter as intensive physical property, extensive physical property or chemical property. _________ 1. Coal is used to produce electricity by burning them to power the generator. _________ 2. Water freezes at O0C. _________ 3. Salt and refined sugar are both white in color. _________ 4. 5 kg. rice is as heavy as 5 kg. newly harvested cotton. _________ 5. Silver is usually tarnished when exposed to air forming silver oxide. _________ 6. Color of the paper _________ 7. Combustibility of plastic _________ 8. Length of paper _________ 9. Mass of the paper _________ 10. Boiling point of water.

1. Which physical property of matter is shown when a piece of material is turned into a thin sheet? A. Stiffness B. Flexibility C. Elasticity D. Malleability
2. Copper wires are usually used for electrical wire installations because it is ____ A. ductile B. malleable C. brittle D. cheap
3. Materials that easily break when a force is applied like glass are said to be ____ A. malleable B. brittle C. ductile D. elastic
4. Which of the materials below is a poor conductor of heat? A. Iron B. Wood C. Gold D. Copper
5. ____ is the characteristic or trait that can be observed when a matter reacts to another substance. A. Intensive Physical Property B. Extensive Physical Property C. Chemical Property D. Physical Property
6. ____ property is the characteristic or trait of matter that does not depend on the amount. A. Intensive Physical Property B. Extensive Physical Property C. Chemical Property D. Physical Property 7. ____ is the characteristic or trait of matter that can be observed or perceived with our senses easily without changing its chemical composition. A. Intensive Physical Property B. Extensive Physical Property C. Chemical Property D. Physical Property 8. ____ is the characteristic or trait of matter which is dependent on the amount or quantity. A. Intensive Physical Property B. Extensive Physical Property C. Chemical Property D. Physical Property 9. Color and taste are examples of ____ A. Intensive Physical Property B. Extensive Physical Property C. Chemical Property D. Physical Property 10. The rusting of iron nail is an example of ___. A. Intensive Physical Property B. Extensive Physical Property C. Chemical Property D. Physical Property

Chemical Formula of Common

Chemical Substances

Complete each statement with a word/ concept in the blank of the item.

1. The chemical symbol of oxygen is _______.

2. There is/are _______ hydrogen atom/s

present in this chemical formula C 6 H 12 O 6.

3. _________ is shorthand of expressing the

types and the number of atoms present in a

substance.

4. C is the chemical symbol for ___________.

5. There is/are ______ oxygen atom/s in

H 2 O.

Determine the types and number of atoms

in the following chemical formulas.

6. BF 3

7. C 3 H 8

8. K 2 CO 3

9. CH 4

10. CF 4

Consumer Products Match the descriptions under Column A with the correction concepts or words in Column B. Column A

1. The amount that has to be paid to buy something
2. Refers to ingredient or constituent
3. These are goods that are bought for consumption by the average consumer
4. Refers to an area or a sphere
5. Application of Science Column B A. Consumer Products B. Technology C. Cost D. Composition E. Field
6. Area or sphere is refereed as ___ A. Science C. Field B. Consumer Products D. Composition
7. What do you call the goods that are bought for consumption by the average consumer? A. Science C. Field B. Consumer Products D. Composition
8. _____ is the amount that has to be paid to buy something. A. Cost C. Science B. Consumer products D. Composition
9. ____ refer to the body of knowledge. A. Cost C. Science B. Consumer products D. Composition
10. ____ refers to the ingredients or constituents A. Cost C. Science B. Consumer products D. Composition Methods of Separating Components of Mixtures and Compounds
11. A heterogeneous mixture can be separated by all of the following methods EXCEPT ____ A. filtration C. distillation B. decantation D. mechanical separation
12. To get salt out of a solution, we could use

---

A. filtration C. distillation B. decantation D. mechanical separation 3. Mary wants to get the iron filings out of some fine sand, what could be used to separate these two solids? A. Magnet B. Sieve C. Evaporation D. Decantation 4. Condensing means transforming from gas to _____ A. solid B. liquid C. gas D. plasma 5. If I pour the water off after I boil the banana, this method is an example of _____ A. filtration C. distillation B. decantation D. mechanical separation B. Sentence Completion. Complete each statement with a word/ concept in the blank of the item. 1. Separating sand and water could be done through _____. 2. ____ involves the use of centrifuge to speed up the settling of the precipitate using centrifugal or rotating motion. 3. The separation technique that takes advantage of different boiling points in called ____ 4. The best way to decompose water into oxygen and hydrogen is by ____ 5. The sugar in sugar solution can be removed by _______. 1. 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? A. Filtration C. Distillation B. Decantation D. Mechanical separation 2. Which of the following mixtures could NOT be used in separating the components of mixtures through decantation? A. Quail egg in hot water B. Sugar in hot water C. Sand in glass of water D. Utensils in warm water 3. Which of these methods could be used to separate an insoluble solid from a soluble solid? A. Mixing the mixture with water and then filtering it. Then evaporate the water from the resulting liquid.

B. Mixing the mixture with sand and then filtering it. Then evaporate the sand from the resulting solid C. Mixing the mixture with hydrogen gas and then filtering it. Then evaporate the solids out. D. None of the above.

4. Which method uses the boiling point differences by gradually heated a mixture? The substance that vaporize the easiest will separate first. A. Filtration C. Distillation B. Decantation D. Mechanical separation
5. A coffee filter is used to separate coffee liquid from ground, this is a suitable example of ____ A. filtration C. distillation B. decantation D. mechanical separation B. Sentence Completion. Complete each statement with a word/ concept in the blank of the item.
6. ___is a chemical decomposition of breakdown produced by passing an electric current through a liquid or solution containing ions.
7. ___involves the use of forceps, sieves and other similar tools to separate the components of mixtures. Common Isotopes and Their Uses
8. Uranium-235 has 92 protons. How may neutrons does it have? A. 143 C. 235 B. 92 D. 90
9. What are isotopes? A. Atoms that have the same number of neutrons but have different numbers of protons. B. Atoms that have the same number of electrons but have different numbers of protons. C. Atoms that have the same number of protons but have different numbers of neutrons. D. Atoms that have the same number of neutrons and protons.
10. Uranium-238 has 92 protons. How many neutrons does it have?

A. 239 C. 92

B. 146 D. 330

4. Why is deuterium 2 H 1 sometimes called heavy hydrogen? A. It has extra nucleus B. It has extra proton C. It has extra electron D. It has extra neutron
5. The beta particle has a charge of ___ A. -1 C. + B. -2 D. +