
Topic 6 MCQs IGCSE Review
Flashcard
•
Biology
•
9th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the principle of conservation of mass?
Back
The principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.
2.
FLASHCARD QUESTION
Front
Define an ionic bond.
Back
An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions, typically between a metal and a non-metal.
3.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.
4.
FLASHCARD QUESTION
Front
Explain the concept of molarity.
Back
Molarity is a measure of concentration, defined as the number of moles of solute per liter of solution (mol/L).
5.
FLASHCARD QUESTION
Front
What is the pH scale?
Back
The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.
6.
FLASHCARD QUESTION
Front
Define kinetic energy.
Back
Kinetic energy is the energy possessed by an object due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.
7.
FLASHCARD QUESTION
Front
What is the law of reflection?
Back
The law of reflection states that when a light ray reflects off a surface, the angle of incidence is equal to the angle of reflection.
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