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Q 1/110
Score 0
What is the atomic number of carbon?
30
2
6
12
8
Q 2/110
Score 0
Which element has the symbol Hg?
30
Helium
Iron
Hydrogen
Mercury
110 questions
Q.
What is the atomic number of carbon?
1
30 sec
Q.
Which element has the symbol Hg?
2
30 sec
Q.
Which gas is the most abundant in Earth's atmosphere?
3
30 sec
Q.
What is the chemical symbol for gold?
4
30 sec
Q.
What is the pH value of a neutral solution?
5
30 sec
Q.
What is the chemical formula for water?
6
30 sec
Q.
Which element is the most abundant in the Earth's crust?
7
30 sec
Q.
What is the chemical symbol for sodium?
8
30 sec
Q.
Which of the following is a noble gas?
9
30 sec
Q.
Which of the following is a strong acid?
10
30 sec
Q.
What is the basic building block of matter?
11
30 sec
Q.
What is the state of matter with a definite shape and volume?
12
30 sec
Q.
What is the process by which a solid changes directly into a gas?
13
30 sec
Q.
What is the unit of measurement for the amount of substance?
14
30 sec
Q.
What is the process by which a gas changes directly into a solid?
15
30 sec
Q.
What is the measure of the amount of matter in an object?
16
30 sec
Q.
What is the process by which a gas changes into a liquid?
17
30 sec
Q.
What is the measure of the total amount of space occupied by an object?
18
30 sec
Q.
What is the process by which a liquid changes into a gas at a temperature below its boiling point?
19
30 sec
Q.
What is the smallest unit of a compound that retains the chemical properties of that compound?
20
30 sec
Q.
What is the smallest unit of matter?
21
30 sec
Q.
Which of the following is an example of a chemical change?
22
30 sec
Q.
Which of the following is a physical property of matter?
23
30 sec
Q.
What is the basic unit of a compound?
24
30 sec
Q.
What is the state of matter with no definite shape or volume?
25
30 sec
Q.
What is the smallest particle of an element that retains the chemical properties of that element?
26
30 sec
Q.
Which subatomic particle has a positive charge?
27
30 sec
Q.
Which component of an atom has a neutral charge?
28
30 sec
Q.
Which subatomic particle has a negative charge?
29
30 sec
Q.
What is the atomic number of an atom?
30
30 sec
Q.
Which subatomic particle is responsible for determining the chemical properties of an element?
31
30 sec
Q.
What is the atomic symbol for the element hydrogen?
32
30 sec
Q.
Where is most of the mass of an atom located?
33
30 sec
Q.
What is the total number of electrons in a neutral atom?
34
30 sec
Q.
Which of the following is a characteristic property of acids?
35
30 sec
Q.
Which of the following substances is a strong base?
36
30 sec
Q.
Which of the following is a characteristic property of bases?
37
30 sec
Q.
Which of the following substances is a strong acid?
38
30 sec
Q.
Which of the following is a characteristic property of a neutral solution?
39
30 sec
Q.
Which of the following is a characteristic property of a strong acid?
40
30 sec
Q.
Which of the following is a characteristic property of a weak base?
41
30 sec
Q.
Which of the following substances is a common household acid?
42
30 sec
Q.
Which of the following is a characteristic property of a base?
43
30 sec
Q.
Which of the following particles has a positive charge?
44
30 sec
Q.
Which of the following subatomic particles has the least mass compared to the others?
45
30 sec
Q.
What is the maximum number of electrons that can occupy the first electron shell?
46
30 sec
Q.
Which of the following is located outside the nucleus of an atom?
47
30 sec
Q.
Which type of bond involves the sharing of electrons between two atoms?
48
30 sec
Q.
Which type of bond involves the transfer of electrons from one atom to another?
49
30 sec
Q.
Which type of bond involves the sharing of electron density between adjacent atoms?
50
30 sec
Q.
Which type of bond is formed by the attraction between positive and negative ions?
51
30 sec
Q.
What type of bond is formed by the attraction between a metal cation and a surrounding sea of delocalized electrons?
52
30 sec
Q.
What is the process by which two or more atoms chemically combine to form a new substance?
53
30 sec
Q.
Which type of bond involves the attraction between a partially positive hydrogen atom and a partially negative atom in a different molecule?
54
30 sec
Q.
What is the term given to the attractive force between two atoms within a molecule?
55
30 sec
Q.
Which type of bond involves the sharing of a pair of electrons between two atoms?
56
30 sec
Q.
Which of the following is a unit of length?
57
30 sec
Q.
Which of the following is a unit of temperature?
58
30 sec
Q.
Which of the following is a unit of weight?
59
30 sec
Q.
Which of the following is a unit of time?
60
30 sec
Q.
Which of the following is a unit of volume?
61
30 sec
Q.
Which of the following is a unit of electric current?
62
30 sec
Q.
Which of the following is a unit of area?
63
30 sec
Q.
Which of the following is a unit of mass?
64
30 sec
Q.
Which element has the symbol Mg?
65
30 sec
Q.
Which element has the atomic number 6?
66
30 sec
Q.
Which of the following is an example of a redox reaction?
67
30 sec
Q.
In an electrochemical cell, what is the role of the cathode?
68
30 sec
Q.
What is the purpose of a salt bridge in an electrochemical cell?
69
30 sec
Q.
Which of the following is an example of an oxidation reaction?
70
30 sec
Q.
What is the standard reduction potential of hydrogen gas (H2) in an electrochemical cell?
71
30 sec
Q.
Which of the following is true about the anode in an electrochemical cell?
72
30 sec
Q.
Which of the following is an example of a non-spontaneous electrochemical reaction?
73
30 sec
Q.
What is the chemical formula of potassium permanganate?
74
30 sec
Q.
Which of the following is an example of a voltaic cell?
75
30 sec
Q.
What is the purpose of an electrolyte in an electrochemical cell?
76
30 sec
Q.
Which of the following is true about oxidation in electrochemistry?
77
30 sec
Q.
What is the mole ratio between hydrogen and oxygen in the balanced chemical equation for the combustion of hydrogen gas (H₂) to produce water (H₂O)?
78
30 sec
Q.
In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced when 4 moles of oxygen gas react?
79
30 sec
Q.
How many grams of carbon dioxide (CO₂) are produced when 25 grams of methane (CH₄) combusts completely?
80
30 sec
Q.
In the reaction 2Na + Cl₂ -> 2NaCl, how many grams of sodium chloride (NaCl) are produced when 4 grams of sodium (Na) react with excess chlorine (Cl₂)?
81
30 sec
Q.
In the reaction 2KClO₃ -> 2KCl + 3O₂, how many grams of potassium chloride (KCl) are produced when 20 grams of potassium chlorate (KClO₃) decomposes completely?
82
30 sec
Q.
What is the mole ratio between carbon dioxide (CO₂) and glucose (C₆H₁₂O₆) in the balanced chemical equation for the combustion of glucose?
83
30 sec
Q.
How many moles of oxygen gas (O₂) are required to completely react with 2 moles of ethanol (C₂H₅OH) according to the balanced chemical equation?
84
30 sec
Q.
When 4 moles of nitrogen gas (N₂) react with an excess of hydrogen gas (H₂) according to the balanced chemical equation, how many moles of ammonia (NH₃) are produced?
85
30 sec
Q.
In the reaction 2H₂O₂ -> 2H₂O + O₂, how many moles of oxygen gas (O₂) are produced when 3 moles of hydrogen peroxide (H₂O₂) decompose completely?
86
30 sec
Q.
How many grams of carbon dioxide (CO₂) are produced when 1 mole of methane (CH₄) combusts completely?
87
30 sec
Q.
Which of the following elements is a transition metal?
88
30 sec
Q.
Which of the following elements is a halogen?
89
30 sec
Q.
Which of the following elements is an alkaline earth metal?
90
30 sec
Q.
Which of the following elements is considered a semiconductor?
91
30 sec
Q.
Which functional group is present in an alcohol?
92
30 sec
Q.
Which of the following is a characteristic of an aromatic compound?
93
30 sec
Q.
What is the functional group present in a carboxylic acid?
94
30 sec
Q.
What is the process called when a molecule gains oxygen or loses hydrogen?
95
30 sec
Q.
What is the general formula for an alkane?
96
30 sec
Q.
Which type of reaction involves the breaking of a large molecule into smaller molecules?
97
30 sec
Q.
What is the main functional group found in a ketone?
98
30 sec
Q.
Which functional group is present in an aldehyde?
99
30 sec
Q.
What is the term for the process by which an atom or group of atoms replaces a hydrogen atom in an organic compound?
100
30 sec
Q.
What is the functional group present in an amine?
101
30 sec
Q.
Which functional group contains both a double bond and a hydroxyl group?
102
30 sec
Q.
Which of the following is an example of a carbohydrate?
103
30 sec
Q.
Which of the following is an example of a saturated hydrocarbon?
104
30 sec
Q.
Which compound is commonly known as 'vinegar'?
105
30 sec
Q.
Which functional group is present in an amine?
106
30 sec
Q.
Which molecule functions as a universal energy carrier in living organisms?
107
30 sec
Q.
Which of the following functional groups is characteristic of aldehydes?
108
30 sec
Q.
Which compound is responsible for the 'hot' sensation in chili peppers?
109
30 sec
Q.
Which functional group is present in a carboxylic acid?
