EVALUATION EXAM 7 (Physics and Chemistry) Flashcards
Which of the following statement/s about sound is/are true?
I. All sounds are produced by the vibration of bodies.
II. Sound cannot travel through a vacuum.
III. Sound can be transmitted through some material.
A. I and II
B. I, II and III
C. I and III
D. II and III
B. I, II and III
Noise above ______ over a prolonged period of time may start to damage your hearing.
A. 90 dB
B. 70 dB
C. 100 dB
D. 50 dB
B. 70 dB
What is the metal used to recover copper from a solution of copper sulphate?
A. Fe
B. Na
C. Ag
D. Hg
A. Fe
How is “molarity” defined?
A. the number of moles of solute in 1 L of solution
B. the number of gram-equivalent weights of solute in L of solution
C. the number of moles of solute in 1000 g of solvent
D. the number of gram-formula weights of solute per liter
A. the number of moles of solute in 1 L of solution
In the periodic table of elements, which ONE of the following is light metal?
A. Potassium
B. Mercury
C. Silver
D. Gold
A. Potassium
What is a substance that cannot be broken down into simpler substaces?
A. Ion
B. Atom
C. Molecule
D. Element
D. Element
Vinegar is a solution of water and what kind of acid?
A. Phosphoric acid
B. Sulfuric acid
C. Nitric Acid
D. Acetic Acid
D. Acetic Acid
It is an atom of a specific isotope
A. Ion
B. atom
C. Nuclide
D. Fermion
C. Nuclide
What is the charge of oxygen ion in CaO?
A. -1
B. -2
C. +1
D. +2
B. -2
What refers to ions that are NOT involved in the overall reactions?
A. Guest Ions
B. Extra Ions
C. Spectator Ions
D. Special Ions
C. Spectator Ions
A substance is oxidized when which of the following occurs?
A. It turns red.
B. It becomes more negative.
C. It loses electrons.
D. It gives off heat.
C. It loses electrons.
Which of the following equations is incorrect?
A. S + Fe -> FeS
B. ZnSO4 + Na2S -> ZnS + Na2SO4
C. H2SO4 + ZnS -> ZnSO4 + H2S
D. ZnS + O2 -> SO2 + ZnO
ZnS + O2 -> SO2 + ZnO
The defect of a lens by which rays entering near the edge of the lens are brought to a focus nearer the lens than the rays that enter near the center.
A. Coma
B. Distortion
C. Astigmatism
D. Aberration
D. Aberration
How is “molality” defined?
A. the number of moles of solute in 1 L of solution
B. the number of gram-equivalent weights of solute in L of solution
C. the number of moles of solute in 1000 g of solvent
D. the number of gram-formula weights of solute per liter
C. the number of moles of solute in 1000 g of solvent
How many moles are there in one atom?
A. 3.6 x 10^23
B. 6.023 x 10^23
C. 1.66 x 10^-24
D. 2.5 x 10^24
C. 1.66 x 10^-24
What type of bond results in the from the sharing of electrons by two atoms?
A. atomic bond
B. covalent bond
C. metallic bond
D. ionic bond
B. covalent bond
Which of the following is the strongest type of bonds?
A. Van der Waals
B. Metallic
C. Covalent
D. Ionic
C. Covalent
It is the number of protons in the nucleus of an atom.
A. Molecular Number
B. Proton Number
C. Mass Number
D. Atomic Number
D. Atomic Number
The electrolyte is a solution of water and
A. sulfuric acid
B. uric acid
C. nitric acid
D. formic acid
A. sulfuric acid
The formula for Dinitrogen Pentoxide
A. (NO) 5
B. N2O5
C. 2N5O
D. NO
B. N2O5
Which one can’t travel through a vacuum?
A. Radio waves
B. Light waves
C. Sound waves
D. Short waves
C. Sound waves
An audio frequency is said to be within
A. 400 Hz to 40,000 Hz
B. 20 Hz to 20,000 Hz
C. 100 Hz to 100,000 Hz
D. None of these
B. 20 Hz to 20,000 Hz
It refers to the magnitude of auditory sensation produced by the sound?
A. Loudness
B. Intensity
C. Pitch
D. Tone
A. Loudness
Which of the following is not in SI unit?
A. Candela
B. Fahrenheit
C. Newton
D. Kilogram
B. Fahrenheit
