1.-What is chemistry?

Study of the structure of atoms and the transformation of matter

76. What is the second law of thermodynamics?

It explains why chemical processes occur spontaneously

98. They are those where the product of the first reaction is the reactant of the next reaction.

Consecutive or successive reactions

5.-What is the galactose?

A sugar composed of six carbon atoms

16.-What is the function of oxidoreductases

Catalyze oxidation-reduction reactions

8.-What is a bradykinin?

A peptide hormone,relates to the cause of pain

13.-Four elements most frequent found in proteins:

Carbon,Hydrogen,Oxygen and Nitrogen

studbud

Selected Topics of Chemistry PIA

100 termsStudBud Administration15 plays

Review activity for stages 1,2,3 and 4

Flashcards100 cardsFPractice quizPHost liveL

Questions 100

Answers

1
17.-Are the most abundant biomolecules in nature,created from light energy through photosynthesis
Carbohydrates
Enzymes
Simple proteins
Carbon molecules
2
93. “impossible to construct a machine that works cyclically and produces no other effect than the transfer of heat from
Nernst’s statement
Kelvin-Plank’s statement
Newton’s statement
Clasius statement
3
85. Which is the formula used to calculate a thermal equilibrium?
Q=(m)(Ce)(∆T)
MD=(Σ Ixi - x̄I)/ n
n=PV/RT
F=U-(T)(S)
4
29. Reduction happens when an atom loses electrons
False
True
5
74. it is the total energy that a system has due to the particles that make it up
free energy
entropy
internal energy
enthalpy
6
1.-What is chemistry?
Study of the processes that occur in the cells in living organism
Study of the structure of atoms and the transformation of matter
Study of the physical quantities of a reaction
Study of speed and mechanism by which chemical reactions are carried out
7
88. How is Entropy represented in thermodynamics?
T
S
E
Y
8
9.-Are essential in cellular function and structure that contains genetic information
Proteins
Enzymes
Amino acids
Sugars
9
60. which is the law for the following equation: (P1)(V1)=(P2)(V2)
boyle’s law
ideal gas law
charles law
gay-lussac’s law
10
89. Isothermal expansion – Isentropic expansion - Isothermal compression - Isentropic compression refers to what cycle
The life cycle
Carnot cycle
Weber cycle
water cycle
11
31. Balance this equation: KClO3 → KCl + O2
4 KClO3 → 4 KCl + 2 O2
It is already balanced
KClO3 → KCl + 3 O2
2 KClO3 → 2 KCl + 3 O2
12
56. which law talks about the relationship of pressure, volume and absolute temperature of a fixed amount of gas.
law of partials pressures
ideal gas law
combined gas law
boyle’s law
13
76. What is the second law of thermodynamics?
Every action has a reaction
It explains why chemical processes occur non-spontaneously
It explains why chemical processes occur spontaneously
The matter isn’t created or destroyed, it only transforms
14
25.-Study of the chemical and biochemical processes related to the soil-plant system
Molecular biology
Organic chemistry
Metabolic biochemistry
Agrochemistry
15
68. is the ability to do work or transfer heat.
heat
work
force
energy
16
71. which concept uses the following formula: __= (F)(d)
force
energy
heat
work
17
2.-Carbon atoms that are bonded together by means of a covalent bond
Hydrocarbons
Methane
Thiols
Carboxylic acids
18
67. what is the equivalence of 1 atm in to mm Hg
101325
760
7600
1.01325
19
98. They are those where the product of the first reaction is the reactant of the next reaction.
Parallel and competitive reactions
Bidirectional or opposite reactions
Consecutive or successive reactions
Elementary or simple reaction
20
59. which is the law for the following formula: V1/T1=V2/T2
boyle’s law
ideal gas law
gay-lussac’s law
charles law
21
78. Its the reversible isothermal gas expansion process
Aristotelic cycle
Socratetic cycle
Carnot cycle
Cassius cycle
22
94. Impossible to construct a machine that performs the same amount of work”
Kelvin-Plank’s statement
Clasius’ statement
Newton’s statement
Nernst’s statement
23
40. Which is the part of the galvanic cell that connects the solution and closes the circuit?
Salt bridge
Anode
Membrane
Connecting wire
24
58. which is the law for the following formula: (P1)(V1/T1)=(P2)(V2/t2)
combined gas law
ideal gas law
boyle’s law
law of partials pressures
25
5.-What is the galactose?
A sugar originated from fruits and vegetables
A biopolymer formed by the bonds of glucose
A plant polysaccharide macromolecule that can be digested by human beings
A sugar composed of six carbon atoms
26
77. It refers to the degree of dispersion of energy in a thermodynamic system.
Entropy
Variation
Enthalpy
Deviation
27
36. Type of cell where a non-spontaneous reaction occurs. Consists of a container with a solution.
Fuel cell
Galvanic cell
Voltaic cell
Electrolytic cell
28
18.-Are the simplest carbohydrates,do not have the capability to hydrolyze
Polysaccharides
Monosaccharides
Disaccharides
Saccharides
29
19.-Biomolecules characterized by being soluble in organic solvents
Nucleotides
Steroids
Lipids
Organic Compounds
30
45. Which is the oxidation number of Carbon in CO2?
0
4
-2
2
31
61. which is the law of the following equation: P1/T1=P2/T2
charles law
ideal gas law
boyle’s law
gay-lussac’s law
32
57. the total pressure by a mixture of gases equals to the sum of the partial pressures of each of the constituent gases
law of partials pressures
ideal gas law
combined gas law
boyle’s law
33
16.-What is the function of oxidoreductases
Catalyze the transfer of a functional group between two compunds
Catalyze the joining of two molecules using ATP energy
Catalyze the rearrangement of atoms within a molecule to form an isomer
Catalyze oxidation-reduction reactions
34
51. which one is not a property of gases:
they compress and expand
they do not have their own volume
they have their own shape
they expand and contract
35
10.-Are molecules that consist of at least amino group and acid and one carboxylic group
Sugars
Amino acids
Enzymes
Proteins
36
24.-Type of polymer
Sodium hydroxide
Polyethylene
Polypeptide chain
Adenine
37
8.-What is a bradykinin?
Basic units in the structure of proteins
A peptide hormone,relates to the cause of pain
Synthetic sweetener
Polypeptides that are synthesized by body
38
33. Type of reaction that is produced from a device where a chemical change happens.
Catalytic reaction
Redox reaction
Spontaneous reaction
Non-spontaneous reaction
39
44. Are the substances that are written on the right side of the arrow in a chemical reaction.
Intermediates
Reagents
Catalysts
Products
40
14.-Number of classifications of proteins according to their structure
Two
One
Four
Three
41
21.-Nucleic acids are macromolecules important for life,such as DNA
True
False
42
34. Type of reaction that requires an external source of energy to produce a chemical change.
Spontaneous reaction
Redox reaction
Catalytic reaction
Non-spontaneous reaction
43
20.-Lipid molecules comtaining the sterane core
Waxes
Cholesterol
Steroids
Nucleotides
44
6.-It is originated from the fermentation of barley,used to manufacture the beer
Lactose
Cellulose
Fructose
Maltose
45
42. The metal where oxidation takes place in a cell.
Electrode
Anode
Cathode
Terminal
46
55. which law talks about pressure temperature relationship
boyle’s law
charles law
gay-lussac’s law
ideal gas law
47
79. The entropy of a system of a system that is taken to absolute zero, tends to a specific constant value.
First law of thermodynamics
Second law of thermodynamics
First law of newton
Third law of thermodynamics
48
30. Is the substance that causes another atom or group of atoms to reduce, that is, to gain electrons.
Reducing Agent
Catalyst
Electron Donor
Oxidizing Agent
49
63. which is the law for the following equation: PV: nRT
ideal gas law
boyle’s law
charles law
gay-lussac’s law
50
84. This energy to break a chemical bond of the substances is called _______
Activation energy
Electricity
Chemical energy
Energy of activation
51
13.-Four elements most frequent found in proteins:
Oxygen,Magnesium,Calcium and Iron
Carbon,nitrogen,match and boron
Carbon,Hydrogen,Oxygen and Nitrogen
Iron,Hydrogen,Magnesium and Boron
52
41. The metal where reduction takes place in a cell.
Electrode
Cathode
Terminal
Anode
53
75. it is a mesure of the thermal energy of a chemical system
internal energy
free energy
entropy
enthalpy
54
90. Entropy of a substance increases if:
Stays the same
Changes from gas to liquid
Changes from liquid to solid
Changes from liquid to gas
55
49. Which two elements in the form of stripes are the most used as half cells of an electrochemical cell?
Aluminum and Iron strips
Zinc and Copper strips
Lead and Gold strips
Nickel and Silver strips
56
72. which one is not a type of thermodynamic system:
open system
external system
isolated system
closed system
57
32. Is the branch of chemistry that studies the transformation of chemical energy into chemical energy and vice versa.
Chemistry
Thermodynamics
Physical Chemistry
Electrochemistry
58
65. what is the equivalence of 1 atm in Pa
101325
760
7600
1.01325
59
4.-Hydrolysis is the chemical reaction that occurs between the water molecule and other macromolecule?
True
False
60
27. If an element is not combinated with any other element, which will be its oxidation number?
It wouldn’t have
The same as if it was combinated
1
0
61
12.-The protective function of the proteins is present in membranes?
True
False
62
26. Is an integer that represents the number of electrons that an atom puts into play when it forms a chemica compound.
Oxidation Number
Atomic Number
Valence electrons
Ionic charge
63
92. It is experimentally possible to boult a thermal machine that converts heat into work with a 100% thermal efficiency
False
True
64
54. which law talks about pressure-volume relationship
boyle’s law
charles law
gay-lussac’s law
ideal gas law
65
91. Who states: “The thermal machine requires at least two sources of heat at different temperatures for it to work.”
Carnot
Van’t HoffCarnot
Helmholtz
Clasius
66
35. Every electrochemical process is a redox reaction
True
False
67
22.-Classification of vitamins
Acid and base
Primary and Secondary
Single and Conjugated
Water-soluble and Lipid-soluble
68
83. Which is not a factor that affects the speed of a reaction?
Light
All of them affect the reaction speed
Concentration
Pressure
69
46. Is a chemical change that happens in nature or is experimented in a lab.
Nuclear reaction
Experiment
Physical change
Chemical Reaction
70
81. Is one where chemical species are formed continuously and intermediate species are regenerated in the reaction.
Chemical chain
Reaction speed
Chain reaction
Chemical reaction
71
11.-Examples of Aromatics
Tyrosine and Tryptophan
Alanine,Proline and Isoleucine
Aspartic acid and Glutamic acid
Serine,Asparagine and Tyrosine
72
87. Which theorem relates the entropy and the temperture of a physical system; also known "third law of thermodynamics"
Gibbs’ Heat theorem
Helmholtz heat theorem
Nernst’s Heat theorem
Van’t Hoff heat theorem
73
69. the form of energy that is transferred due to a temperature difference
heat
force
energy
work
74
28. How is called the process that occurs when an atom loses electrons?.
Redox Reaction
Ionization
Electron Loss
Oxidation
75
86. Which is the formula for Helmholdz free energy?
F=U-(T)(S)
Q=(m)(Ce)(∆T)
MD=(Σ Ixi - x̄I)/ n
n=PV/RT
76
39. Voltaic and Galvanic cells are the same?
True
False
77
15.-Cells that make metabolic needs compatible with the conditions of pressure
Enzymes
Amino acids
Sugars
Proteins
78
50. Use of the electrolytic cell that consists of coating a metal with another metal.
Electrolysis
Galvanization
Electrowinning
Electroplating
79
96. The rate is determined by the slowest elementary reaction step
Reaction mechanism
Reaction mechanism
Activation energy
Reaction rate
80
100. _________ is a process that ocurrs naturally, without anything influencing it.
Non-Spontaneous process
Non-natural process
Natural process
Spontaneous process
81
38. Type of cell where electrical energy is generated from spontaneous chemical reactions.
Photovoltaic cell
Electrochemical cell
Electrolytic cell
Battery cell
82
48. Which element is reducing in this reaction? 2 Fe + 3 Cl2 → 2FeCl3
FeCl3
No one
Fe
Cl
83
99. Is considered the chemical reaction that takes place in a single phase.
Consecutive or successive reactions
Parallel and competitive reactions
Bidirectional or opposite reactions
Elementary or simple reaction
84
64. what is the equivalence of 1 atm in torr
7600
101325
1.01325
760
85
70. is the energy used to achieve a displacement of a body of certain distance against a certain force
force
heat
energy
work
86
82. Takes several stages, where at least one intermediate product and at least two intermediate stages are formed
Parallel and competitive reactions
Complex or compound reaction
Consecutive or successive reactions
Bidirectional r opposite reactions
87
62. whic is the law for the following equation: P total= Pgas 1 + Pgas 2 + Pgas 3… + Pn
ideal gas law
law of partial pressures
boyle’s law
combined gas law
88
7.-Type of covalent bond formed between a carbon atom and a nitrogen atom
Ionic bond
Glycosidic bond
Protein
Peptide bond
89
52. which one is the correct amount for the following equivalences K= C + ______ C=K-_______
273
353
320
253
90
43. Are the substances that are written on the left side of the arrow in a chemical reaction.
Intermediates
Catalysts
Products
Reagents
91
73. it's a magnitude that indicates the energy that cannot do useful work in thermodynamic process:
enthalpy
entropy
free energy
internal energy
92
3.-Covalent bond that occurs between two monosaccharides
Methane
Carbon monoxide
Glycosidic bond
Carbohydrates
93
80. Branch of physical chemistry responsible for studying the speed of reactions and the factors that affect it.
Rate theory
Chemical kinetics
Reaction kinetics
Kinetic chemistry
94
97. minimum energy required to break the bond and initiate the chemical reaction
Thresholld activation energy
energy
activation energy
Activation energy
95
66. what is the equivalence of 1 atm in bar
760
7600
1.01325
101325
96
53. which law talks about volume- temperature relationship
ideal gas law
charles law
gay-lussac’s law
boyle’s law
97
23.-Definition of soap
Substances that have the ability to dissolve grease
Product used for personal hygiene
Fertilizer used to add nutrients to the soil
Monomer bonded together to form long chains
98
37. Name of the process that generates the chemical reaction by transferring charges in an electrolytic cell.
Oxidation
Ionization
Electrolysis
Redox reaction
99
95. Sequence of steps involved in a chemical reaction
Chain reaction
Activated complex
Intermediate of a reaction
Reaction mechanism
100
47. Which element is oxidating in this reaction? 2 Fe + 3 Cl2 → 2FeCl3
No one
Fe
FeCl3
Cl

Selected Topics of Chemistry PIA Flashcards | StudBud