MONTESSORI DE SAN ILDEFONSO, INC.
Quijano St., San Juan, San Ildefonso, Bulacan
Contact No. 0931-044-2955 Email Add: mdsi.2002@gmail.com School ID No. 400920
Government Recognition Nos.: Preschool, E. 103, s.2002; Grade School, E. 091, s.2003; JHS, S.003, s.2004; SHSP, 810, s. 2016
EASY & AVERAGE QUESTIONS:
1. Which of the following BEST describe for the given element
195
78
Pt ?
A. It has 195 neutrons, 78 protons, and 117 electrons.
B. It has 78 neutrons, 78 protons, and 117 electrons.
C. It has 117 neutrons, 78 protons, and 78 electrons.
D. It has 195 neutrons, 78 protons, and 78 electrons.
2. A scientist found that a sample of matter contains three types of atoms. The sample can be any of the
following except what?
A. Compound
B. Element
C. Mixture
D. Molecule
3. Ana measuring the mass and volume of a piece of chalk. Which of the following properties of matter that Ana
investigating it?
A. physical and intensive property
B. chemical and extensive property
C. chemical and intensive property
D. physical and extensive property
4. Some commercial soaps and detergent use special ingredients to enhance the cleaning capability of the
products. Which of the following can be the result to the cost of the product if they add special
ingredients?
A. It will decrease.
B. It remains the same.
C. It will increase.
D. It will become free.
5. Which of the following is NOT TRUE about the isotopic symbol
A. The isotope has 29 protons.
B. The isotope has 35 neutrons.
64
29
Cu ?
C. The isotope has 35 electrons.
D. The isotope has a mass number of 64.
6. Why glycerin is essential ingredient in making one of the consumer products which is lotion?
A. To enhance the effect of the product that provide anti-aging benefits.
B. To provide hydration and give smooth feel of the skin.
C. To give an even and flawless look to the skin and face.
D. To prevents the caking of the product that ensures the smoothness of skin.
7. Can a measurement be both precise and accurate?
A. Yes, if the measurement is not close to the accepted value and is not reproducible.
B. Yes, if it is close to the accepted value and is reproducible.
C. No, if the accuracy of the value is not reproducible and accepted.
D. No, if they are both close to the accepted value and can independent.
8. The following are the values obtained in measuring the temperature of a room: 31.0°C, 30.5°C, 30.0°C,
31.3°C, 30.8°C, and 31.1°C. What is the room temperature?
A. 30.5°C
B. 30.6°C
C. 30.7°C
D. 30.8°C
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9. Minnie and Mickey who are 150 m apart start walking toward each other at 3.0 m/s and 5.0 m/s, respectively.
How long will it take for them to meet?
A. 18.75 s
B. 18.95 s
C. 19.00 s
D. 19.01 s
10. Why do action and reaction forces not cancel each other out?
A. Because they cannot separate to each other.
B. Because they are both independent to each other.
C. Because they act on two different bodies.
D. Because they act on two or more different bodies.
11. A hammer drives a nail into a piece of wood. Which describe an action-reaction pair?
A. The hammer exerts a force on the nail; wood exerts a force on the nail.
B. The hammer exerts a force on the nail; nail exerts a force on the hammer.
C. The hammer exerts force on the nail; hammer exerts a force on the wood.
D. The nail exerts a force on the hammer; the hammer exerts a force on the wood.
12. Which of the following is NOT true about free-body diagram?
A. Used to show the relative magnitude and direction of all forces.
B. A free-body diagram is a special example of the vector diagrams.
C. The size of the arrow in a free-body diagram reflects the magnitude of the force.
D. The free-body diagram above depicts four and more forces acting upon the object.
13. Which of the following is NOT law of friction?
A. Friction depends on the nature of surfaces in contact and condition of surfaces.
B. Friction acts parallel to the surfaces in contact and in a direction to oppose motion.
C. Friction is dependent of the area of contact and speed of sliding.
D. Friction is proportional to the normal force.
14. Why does seawater boil at a higher temperature than freshwater?
A. Seawater has dissolved solid, making its boiling point higher.
B. Salt lowers the freezing point of water than freshwater.
C. Freshwater has more solute than seawater.
D. Freshwater has dissolved solid, making its boiling point higher.
15. An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in
temperature imply?
A. The solid is insoluble.
B. The solid releases heat.
C. The process is exothermic.
D. The process is endothermic.
HARD QUESTIONS:
1. How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C?
Answer: 3,027 kJ
2. If the initial concentration of a reactant participating in a first-order reaction is increased threefold, how many
times will the reaction rate increase?
Answer: 3 times
3. A copper wire has a resistance of 15.0 Ω at a temperature of 14°C. After a current pass through the
windings, the resistance rose to 22.5 Ω . To what temperature was the wire heated?
Answer: T=138°C
4. The volume of a gas is 250 mL at 720 torr and 25°C. If the pressure is held constant and the temperature is
raised to 100°C, what will be its new volume?
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Answer: 313 mL
5. A 5.0 L balloon has a pressure of 1.0 atm at sea level, where the temperature is 28°C. The balloon was let
loose and ascended to a height in the atmosphere where the temperature is 11°C. What will be the volume of the
balloon if the atmospheric pressure at the new altitude is 0.65 atm?
Answer: 7.3 L
CLINCHER QUESTIONS:
1. What quantity is always conserved in all types of collisions?
Answer: Momentum
2. What is the coefficient of restitution for an inelastic collision?
Answer: between 0 and 1
3. If block A is stopped in 0.2 s after colliding with block B, find the magnitude of the average force acting on
block A.
Answer: 25 N
4. What is the rotational analog of force?
Answer: torque
5. A uniform meterstick is supported at the 50 cm mark. A 25 N weight is placed at the 10 cm mark. Where
should a 200 N weight be placed for the meterstick to be equilibrium?
Answer: 55.0cm mark
6. Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently
placed on top of the water?
Answer: Surface Tension
7. A solution for disinfecting clinical thermometers was prepared by dissolving 22.5 g of ethyl alcohol in 58.0 g
of water. What is the percentage by mass of ethyl alcohol in the solution?
Answer: 27.95%
8. What is the total electric flux through a closed surface containing a 2.0 µC charge?
Answer: 2.3x105 N.m2/C
9. If you are inside a car and the car is struck by lightning, it is best to stay inside because the electric field
inside the car is what?
Answer: Zero
10. What is the weakest type of intermolecular force?
Answer: London Dispersion Force
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