
Grade12
Authored by Abdu Mohammed Awol
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12th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the atomic number of carbon?
6
12
5
7
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define the term 'molarity'.
Molarity is the mass of solute per liter of solution.
Molarity is the number of moles of solute per liter of solution.
Molarity is the volume of solute in milliliters per liter of solution.
Molarity is the concentration of a gas in the atmosphere.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the pH scale used for?
The pH scale is used to measure the acidity or alkalinity of a solution.
To assess the viscosity of a solution.
To determine the color of a solution.
To measure the temperature of a solution.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between ionic and covalent bonds.
Covalent bonds are stronger than ionic bonds due to their nature of forming crystals.
Ionic bonds involve electron transfer and attraction between ions, while covalent bonds involve electron sharing between atoms.
Ionic bonds occur only in metals, while covalent bonds occur in non-metals.
Ionic bonds are formed by sharing electrons, while covalent bonds involve electron transfer.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the law of conservation of mass?
Mass is conserved in chemical reactions; it cannot be created or destroyed.
Mass can be created in chemical reactions.
Mass can be destroyed during a reaction.
Mass is only conserved in physical changes.
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