LSBSHS CHEMISTRY

Weekly Test in Chemistry (August 8, 2013)

I. Classification

A. Tell whether the following if it is an acid or base

1. H₂SO₄

2. KOH

3. CH₃COOH

4. HNO₃

5. Mg(OH)₂

6. Al(OH)₃

7. H₂CO₃

8. C₅H₄N₄O₃

9. Ca(OH)₂

10. NaCl

B. Identify the following if it is an organic substance or inorganic substance.

1. CaO

2. CH₃OH

3. C₆H₆

4. CaCO₃

5. MgCO₃

6. CH₃COOH

7. AlCl₃

8. NaClO

9. CO₂

10. C₆H₁₂O₆

Weekly Test in Chemistry (August 2, 2013)

I. Completion.

I. Classification.

A. Element or Compound

1. gold bar

2. table sugar

3. baking powder

4. magnesium ribbon

5. carbon dioxide

6. aluminum foil

7. water vapor

8. iron fillings

9. muriatic acid

10. vinegar

11. sulphur powder

12. copper wire

13. diamond

14. table salt

15. graphite

B. Metal, Nonmental, or Metalloid

1. Arsenic

2. Oxygen

3. Zinc

4. Silicon

5. Bromine

6. Silver

7. Krypton

8. Calcium

9. Hydrogen

10. Germanium

11. Argon

12. Sodium

13. Mercury

14. Boron

15. Tungsten

Weekly Test in Chemistry (July 26, 2013)

I. Completion. Draw inside the box the particles of the following phases. Fill in the blanks the properties of these phases in terms of their volume and shape.

Solids Liquids Gases

Volume ____________ ____________ ____________

Shape ____________ ____________ ____________

II. Identification.

1. Physical change from one state of matter to another.

2. A solid which the particles are arranged in manner without any pattern.

3. A solid which the arrangement of the particles has pattern.

4. A distinct property of liquids which gives them the resistance to flow.

5. Chemical property of matter which is the ability to burn.

6. Chemical property of matter which is the ability to combine chemically with other substance.

7. The ability of matter to be drawn into sheets.

8. The ability of matter to be drawn into wires.

9. These are properties that depend on the amount of materials.

10. These are properties that depend on the quality of material.

11. Referred to as chemical reaction where in a new substance is formed.

12. A change only in appearance but not in the composition.

13. Defined as mass divided by volume.

14. Phase change from solid to liquid.

15. Phase change from liquid to gas without boiling.

16. Phase change from solid to gas.

17. Phase change from liquid to solid.

18. Phase change from liquid to gas with boiling.

19. Phase change from gas to solid.

20. Phase change from gas to liquid.

III. Classification.

A. Tell whether the following is extensive or intensive.

1. Boiling point

2. Height

3. Solubility

4. Texture

5. Taste

6. Weight

7. Electrical conductivity

8. Hardness

9. Volume

10. Specific gravity

B. Label the following as chemical change or physical change.

1. Photosynthesis

2. Slicing an apple

3. Dissolving sugar in water

4. Dynamite explosion

5. Formation of rock

6. Molding a clay

7. Frying egg

8. Grinding peanuts

9. Melting candle wax

10. Tarnishing silver necklace

Weekly Test in Chemistry (July 19, 2013)

I. Give the uses of the following laboratory apparatuses.

1. spatula

2. wash bottle

3. mortar and pestle

4. crucible and cover

5. evaporating dish

6. thermometer

7. funnel

8. tripod

9. platform balance

10. volumetric flask

II. Illustrate the following.

1. erlenmeyer flask

2. watch glass

3. florence flask

4. graduated cylinder

5. beaker

6. reagent bottle

7. medicine dropper

8. test tube

9. iron stand

10. iron ring

III. Give the reasons for the following laboratory operations and techniques.

1. Glass as the common material in laboratory.

2. Porcelain as the material of some apparatuses.

3. Dark colored bottles as container of some of the chemicals.

4. Not clamping glassware too tightly.

5. Using a piece of paper when transferring solid chemicals to test tube.

6. Using a dry and clean spatula in transferring solid chemicals.

7. Never point a test tube that is being heated towards somebody.

8. Using a glassrod when pouring liquid chemicals.

9. Never directly inhale the air to get the odor of a substance.

10. Using wire gauze in heating.

Weekly Test in Chemistry (July 12, 2013)

I. Completion. Complete the formula for the following temperature scales.

1. ⁰C = __________

2. ⁰F = __________

3. K = __________

II. Definition.

1. Conversion

2. Conversion factor

III. Conversion.

A. Temperature Scales

1. 252.13 ⁰F to ⁰C

2. -12.56 ⁰C to ⁰F

3. 622 ⁰F to K

B. Length, Mass and Volume

1. 815 m to km and cm

2. 502 mg to g and kg

3. 200 cm³ to m³

Weekly Test in Chemistry (July 5, 2013)

I. Enumeration.

1-4. Give at least four measurements based on body parts

5-7. Three systems of measurement

8-9. Where and when did the metric system originate?

10-30. The seven fundamental quantities and their corresponding base units and symbols.

(Ex. Length – meter – m)

II. Write the equivalent of the following.

1. 1 m = _______ cm

2. 1 µm = _______ dam

3. 1 hm = _______ Em

4. 1 nm = _______ fm

5. 1 kg = _______ mg

6. 1 mg = _______ zg

7. 1 pg = _______ g

8. 1 Tg = _______ kg

9. 1 µA = _______ A

10. 1 mL = _______ cm³

Weekly Test in Chemistry (June 28, 2013)

I. Express the following in scientific notation

1. 0.000037

2. 861 000 000 000

3. 75 630

4. 0.00000002468

5. 4333

6. 950 000

7. 0.0000391

8. 109

9. 0.0025

10. 0.087

II. Name the following prefixes and its equivalent multiplier

1. P

2. p

3. d

4. Y

5. n

6. k

7. E

8. M

9. z

10. m

11. h

12. Z

13. da

14. µ

15. f

16. y

17. T

18. G

19. a

20. c