What is the atomic number of carbon?

Chemistry Concepts for Grade 11

Quiz
•
Others
•
11th Grade
•
Hard

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7
6
12
5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define the term 'mole' in chemistry.
A mole is the volume of a gas at standard temperature and pressure.
A mole is a unit of mass equivalent to one gram.
A mole is the amount of substance containing 6.022 x 10^23 entities.
A mole is a measure of temperature in chemical reactions.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the chemical formula for water?
H2O
H2O2
HO2
O2H
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between ionic and covalent bonds.
Ionic bonds are formed only in metals, while covalent bonds occur in non-metals only.
Ionic bonds involve sharing electrons, while covalent bonds involve attraction between ions.
Ionic bonds involve electron transfer and attraction between ions, while covalent bonds involve electron sharing between atoms.
Covalent bonds are stronger than ionic bonds due to their electron transfer nature.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the pH scale and what does it measure?
The pH scale indicates the color of a solution.
The pH scale measures the density of a solution.
The pH scale measures the temperature of a solution.
The pH scale measures the concentration of hydrogen ions in a solution.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the process of photosynthesis in terms of chemical reactions.
6CO2 + 6H2O + light energy -> C6H12O6 + 6O2
6O2 + light energy -> 6CO2 + C6H12O6
C6H12O6 + 6O2 + light energy -> 6CO2 + 6H2O
6CO2 + 6H2O -> C6H12O6 + 6O2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the law of conservation of mass?
Mass can be created in chemical reactions.
Mass is conserved in chemical reactions.
Mass is only conserved in physical reactions.
Mass is lost during physical changes.
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