問題一覧
1
What is formed when acids will react with active metals?
C. Hydrogen
2
What refers to the negatively charge component of an atom?
A. Electron
3
Which of the following statements regarding organic substances is FALSE?
A. organic matter is generally stable at very high temperatures
4
All isotopes of the same element have ________.
B. Equal number of protons
5
The dry air is composed of how many percent oxygen?
D. 20.9 %
6
What do you call electrons that affect the reactivity of atoms with other elements?
D. Valence Electrons
7
What is the unit of molar mass?
B. Grams per Mole
8
If the heat of a solution is negative, heat is given off when the solute dissolves in the solvent. What type of reaction is this?
B. Exothermic
9
What refers to the amount of heat released by one mole of a substance when it change from liquid to solid?
B. molar heat of fusion
10
What type of bonding in which electrostatic attraction is predominant?
A. Ionic Bonding
11
What is the atomic number of "Carbon".
C. 6
12
Which of the following metals has the highest specific heat capacity?
B. Aluminum
13
Which of the following is the most electronegative element?
D. Flourine
14
One of the following is the standard pressure and temperature. Which one?
A. 0°C and one atmosphere pressure
15
The device which measures the acid content of the cell is called _________ .
B. Hydrometer
16
During chemical reactions, bonds between atoms are broken and new bonds are usually formed. What do you call the starting substance?
C. Reactants
17
Which of the following is energy removal being applied?
C. Changing water to ice
18
What is the component of a solution that is dissolved?
D. Solute
19
What refers to the number of atoms in exactly 12 grams of carbon-12 ?
A. Avogadro's Number
20
What type of rocks are considered a majority in the earth's crust?
D. Igneous
21
Liquid in chemistry is ____________
C. Solvent
22
A deutron is _______________?
B. A nucleus containing a neutron and a proton
23
What principles states that the electrons fill the orbitals, one at a time, starting with the lowest orbital then proceeding to the one with higher energy?
D. Aufbau Principle
24
Which one refers to two or more non-volatile liquids in which separation takes place very slowly?
C. Emulsion
25
Hydrogen, fluorine, chlorine, bromine, and iodine are what kind of molecules?
C. Diatomic
26
What term refers to the passage of an electric current through an electrolyte caused by an external voltage source. Which one?
A. Electrolysis
27
The amount of electricity a battery can produce is controlled by _____________ ?
B. the strength of the acid
28
What type of bond results in from the sharing of electrons by two atoms?
B. Covalent Bond
29
During a complete or partial neutralization of acids, what is the ionic compound formed?
B. Salt
30
What term is used to refer to a negatively charged ion?
A. Anion
31
Which form of matter is bendable, takes the shape of its container, and is pourable?
A. Liquid
32
Which of the following has the characteristics of both metals and nonmetals?
C. Metalloids
33
The vertical columns in the periodic table are called ______________ :
A. Groups
34
Which one differs two elements with the atomic number greater than of uranium (U) ?
A. Transuranium Elements
35
What are compounds with the same molecular formula but with different structural formula?
A. Isomers
36
Sublimation is a direct change from: __________________.
B. Solid to gaseous Phase
37
How are elements numbered 58 to 71 in the periodic table called _________?
A. Lanthanons
38
Which of the following is added to the drinking water distribution system for disinfection?
B. Chlorine
39
Liquids that do not mix are said to be _____________.
B. Immiscible
40
What do you call materials that do not conduct electric current?
A. Insulator
41
What is the smallest subdivision of an element or compound that can exist in a neutral state?
A. Molecule
42
What is the distance the nuclei of two bonded atoms called _________ ?
A. Bond Length
43
Which component of an atom has no electric charge?
B. Neutron
44
What do you call hydrocarbons containing carbon to carbon double bonds?
C. Alkenes
45
Which of the following elements and compounds is unstable in its pure form?
D. Sodium ( Na )
46
What is a substance that cannot be decomposed into simpler substances during ordinary chemical reactions?
D. Element
47
What is defined as a value equal to the number of gram moles of solute per 1,000 grams of solvent?
A. Molality
48
Which of the following are intrinsive properties? i. Temperature ii. pressure iiii. composition iv. mass
A. i, ii, and iii
49
How are materials containing atoms with less than four valence electrons classified?
B. A conductor
50
Which of the following does not illustrate the effect of temperature or pressure on gas solubility?
A. air is more humid on rainy days
51
Which of the following is the strongest type of bond?
C. Covalent
52
What occurs when a substance changes in appearance without changing its composition?
C. Physical Change
53
What do you call a substance that dissociates in solutions to produce positive and negative ions?
C. Electrolyte
54
How are elements numbered 90 to 103 in the periodic table called?
B. Actinons
55
How much is the pH content of an acid?
D. Between 0 and 7
56
Which of the following is most likely to prove that a substance is inorganic.
B. the substance is heated together with copper oxide and the resulting gases are found to have no effect on limestones
57
Adding more solute to an already saturated solution will cause the exact solute to settle at the bottom of the container. What is this process called?
A. Precipitation
58
What is the common unit used to indicate the mass of a particle
D. Atomic Mass Unit
59
Which one refers to the standard system of naming chemical compound?
D. Chemical Nomeclature
60
Compounds are mostly classified as ___________________ ?
B. Acids and Bases
61
What is the maximum number of electrons that can be accommodated in the valence shell of an atom?
B. 8
62
Is the attraction between like molecules.
D. Cohesion
63
The elements in the periodic table are arranged according to which?
A. Their Atomic Number
64
What refers to the number of gram equivalent weights of solute per liter of solution.
B. Normality
65
Reactions generally proceed faster at high temperatures because of which of the following?
D. the molecules collide more frequently and activation energy is less
66
What device produces electrical current by way of an oxidation-reduction reaction?
B. Galvanic Cell
67
Which of the following is the simplest type of reaction where two elements are compounds combine directly to form a compound?
C. Direct Combination or Synthesis
68
Halogens fall under what group in the periodic table?
D. Group VII A
69
What element is known as the lightest material?
D. Lithium
70
For a fluid, viscosity is defined as the constant of proportionality between shear stress and what another variable?
D. spatial derivative of velocity
71
Which of the following refers to the measure of the amount of negative ions in the water?
B. Alkalinity
72
What is a substance that speeds up a chemical reaction without itself undergoing a chemical change?
D. Catalyst
73
What do you call the bonding that occurs in inert gases and other elements with full shells, primarily due to attraction between dipole structures?
D. Van Der Waals
74
Caustic soda is used in making soap, textiles, and paper. What is another term for caustic soda?
A. sodium hydroxide
75
What element is used as a coating for iron to make galvanized iron a corrosion-resistant material?
C. Zinc
76
What group in the periodic table is the carbon group?
A. Group IV A
77
How many elements are there in the six period?
C. 32
78
When all of the atoms of a molecule are the same, the substance is called ______________.
A. a Compound
79
Hard water is water which contains soluble salt of which of the following elements?
B. Calcium
80
Which of the following are found in the nucleus of an atom?
C. Protons and Neutrons
81
Which one is a light metal?
A. Potassium
82
What refers to the mass in grams of 1 mole of a substance?
B. Molar Mass
83
How does pressure affects the solubility of gases in liquids?
A. It increases solubility
84
Who developed the modern concept of the atom?
C. Ernest Ruthford