This document appears to be a science exam for 7th grade students covering topics in chemistry and the periodic table. It contains 50 multiple choice questions testing students' knowledge of mixtures, the periodic table, acids and bases, and other chemistry concepts. The questions are accompanied by figures to aid understanding. The exam also provides spaces for students to write their name, section, score, and date. It aims to assess students' understanding of fundamental chemistry principles through multiple choice questions.

1. Republic of the Philippines
Department of Education
Region IV – A CALABARZON
Division of Quezon
MANUEL S. ENVERGA MEMORIAL SCHOOL OF ARTS AND TRADES
Mauban
Name ___________________________________ Score _____________________
Yr. & Sec. _______________________________ Date _____________________
FIRST PERIODICAL EXAMINATION
GRADE 7-SCIENCE
MULTIPLE CHOICE: Read the following statement carefully. Choose the best answer by writing the letter of the correct answer on the space
provided before the number. NO ERASURES AND TAMPERING OF ANSWERS.
_______1. Which among the following is an example of homogeneous mixture?
a. salt and water b. sand and water c. mongo and water d.oil and water
_______2.Solution is considered as what kind of mixture?
a. heterogeneous b. homogeneous c. saturated d. unsaturated
_______3. Which among the following is an example of non polar solvent?
a. water b. oil c. sugar d. salt
_______4. The Law of Octaves was given by _______________
a. Bohr b. Mendeleev c. Newlands d. Dobereiner
_______5.What do you call the vertical rows in a periodic table?
a. groups b. noble gases c. periods d. alkali metals
_______6. It is the horizontal rows in a periodic table.
a. periods b. lathanides c. atomic size d. groups
_______7. It is used to measure how acidic and basic a solution.
a. thermometer b.meter stick c.pH scale d. water scale
_______8. From 0 to 14, what is the pH number if the substance is neutral?
a.3 b.7 c.9 d.13
_______9. Which among the following pertains to the characteristic of metal that can be hammered or rolled into thin sheets without breaking?
a. luster b. ductile c. malleable d. magnetic
_______10. Whing among the following can conduct electricity the fastest?
a. metals b. metalloids c. non-metals d. plastic
_______11. . In which set-up will sugar dissolve the fastest?
a. In hot water b. In tap water c. In cold water d. In warm water
_______12. Which is not included as a factor affecting the solubility of matter?
a. stirring b. temperature c. particle size d. amount of matter
_______13. Which of the following sugar solutions is the most concentrated?
a. 2 g of sugar in 100 ml of water b. 12 g of sugar in 30 ml of water
c. 15 g of sugar in 25 ml of water d. 5 g of sugar in 60 mL of water
FOR NOS. 14-15
a. b. c. d.
_______14. Which one of the following shows the separation technique for decantation?
_______15. Which one of the following shows the separation technique for distillation?
_______16. Which of the following serve as basis for the arrangement of elements in the modern periodic table?
a. Atomic Mass b. Atomic Number c. Boiling point d. Melting point
_______17. What similarity can be identified from the elements within a family or group?
a. Atomic symbols b. Atomic weight c. Atomic number d. Chemical properties
_______18. Which of the following elements are noble gases?
a. Helium, Neon and Argon b. Hydrogen, Lithium and Sodium
c. Hydrogen, Lithium and Sodium d. Boron, Aluminium and Gallium
_______19. Period 1 is considered as the shortest period because it contains only two elements. What are the two elements?
a. Sodium and Krypton b. Hydrogen and Helium
c. Lithium and Berylium d. Hydrogen and Lithium
_______20. Which one of the following statements about bases is correct?
a.They have a pH less than 7. b.They react with metals to form hydrogen gas.
c.They have a sour taste d. They have a slippery feeling
_______21.Which one of the following substances should you rub to the sting of a bee(an acidic bite insect) to neutralize it?
a. water b. vinegar c. lemon juice d. baking soda
_______22. Which ONE of the following is NOT a property of an acid?
a. it turns litmus to red b. it has sour taste
c. it reacts with metals to produce hydrogen gas d. its ph is greater than 7
_______23.Which of the observation best helps you know if a substance is metal?
a. it is black and gritty b. it does not conduct electricity
c. it shatters easily d. it conducts electricity

2. _______24. If an element is a semi-conductor, which classification correctly describes it?
a. metals b. non metals c. metalloids d. compound
_______25. Which is true of non-metals?
a. they are conductors of heat and electricity. b. they are found at the left side of the periodic table
c. they are poor conductors of heat and electricity d. they comprises of about 80%of Earth’ s elements.
______26. Imagine that you performed an experiment in which you dissolve different samples of sugar ( sugar cubes, extra fine sugar and regular
table sugar ) into water samples to compare how long they took to dissolve . Which factor would be the least important to the design of this
experiment?
a. the same amount of sugar must be used in each sample.
b. all the samples must be tested at the same time of the day.
c. the water samples must be all at the same temperature.
d. the sugar samples must all contain only sugar and water.
______27. Which factor would not affect the rate solubility of sugar in water?
a. heat the water and sugar b. stir the water and sugar
c. grind the sugar to make it finer. d. add the sugar to the water .
______28. Which statement about the process of dissolving is true?
a. The process of dissolving releases energy in the form of heat.
b. applying heat often speeds up the process of dissolving because it breaks down the repellent barrier of the solute particles.
c. once a solute, such as a salt crystals, is dissolved in a solvent, it can never return to its original crystal state?
d. the solute spreads out in all direction in a solvent because the solvent and solute particles affect the other.
_____29. If you pound the granules of sugar before adding it in your cup of coffee, does it affect the solubility?
a. No, it has really no effect on solubility because we did not heat it at all.
b. yes, it has increased the surface area so it speeds up the dissolving process.
c. yes, it decreases the solubility.
d. No, it has increased the surface area and so it increases the maximum solubility.
_____30. A beverage contains 3% alcohol which means that
a. The solution contains 3ml of alcohol in 97ml of water.
b. The solution contains 30ml water in 70 ml of water.
c. The solution contains 300 ml of alcohol in 700ml of water.
d. The solution contains 100 ml of alcohol in 100 ml.
FIG 1-FOR NOS. 31-35
______31. Which period contains two elements and considered as the shortest period?
a. Period 1 b. Period 2 c. Period 3 d. Period 4
______32. Which two periods contain 8 elements?
a. Period 1&2 b. Period 2&3 c. Period 3&4 d. Period 4&5
______33. Which two family contain 7 elements?
a. Family 1 and 18 b. Family 3 and 4 c. Family 2 and 13 d. Family 16 and 17
______34. Family 13 is also known as________.
a. Boron Group b. Nitrogen Group c. Halogen Group d. Noble gases
______35. Family 17 is also known as________.
a. Boron Group b. Nitrogen Group c. Halogen Group d. Noble gases
FIG 2- FOR NOS .36 and 37, refer to the activity series on the right
______36. Which element would be most reactive when added to an acid?
a. Platinum b. Lead c. Calcium d. Potassium
______37. Which element would be least reactive when added to an acid?
a. Platinum b. Lead c. Calcium d. Potassium
Potassium
Sodium Most
Calcium reactive
Magnesium
Aluminum
Carbon
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Silver
Gold Least
Platinum reactive
Reactivity Series of Metal

3. FIG 3- FOR NOS 38-41
______38. Based from the figure above, what is the pH scale for soft drinks?
a. 3 b.6 c.9 d.12
______39. Which among the following is an example of acid?
a. detergent b. egg white c. vinegar d. blood
______40. Which among the following is an example of base?
a. gastric juice b. saliva c. milk d. detergent
______41. Which among the following is arranged from weak acid to strong acid?
a. lemon juice, vinegar, softdrinks b. milk, rain water, lemon juice
c. blood, egg white, detergent d. detergent, sea water, milk
FIG 4- FOR NOS 42-45
______42. Based on the position of the elements in the Periodic Table, which letter represents metals?
a. A b. B c. C d. D
______43. Based on the position of the elements in the Periodic Table, which letter represents nonmetals?
a. A b. B c. C d. D
______44. What happens to elements as you move from left to right across the periodic table?
a. becomes less metallic b. have a lower atomic weight
c. have a lower atomic number d. become more metallic
______45. What happens to elements as you move from top to bottom in the periodic table?
a. increasing metallic property b. decreasing metallic property
c. decreasing nonmetallic property d.increasing nonmetallic property
FOR NOS 46-50. Draw the set-up for FILTRATION and write the labels.
“Just do your best and God will do the rest”
PREPARED: CHECKED:
GLACY P. RATO ANNA GRACE A. ALPUERTO
Science Teacher Head Teacher I – Science Department