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Basic Chemistry Concepts : Chemistry
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Practice Test
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Question 1 of 39
What is the chemical symbol for gold?
Choose 1 answer
Au
Ag
Pb
Fe
Question 2 of 39
Which of the following elements is a noble gas?
Choose 1 answer
Oxygen
Nitrogen
Neon
Hydrogen
Question 3 of 39
What is the pH value of pure water at 25°C?
Choose 1 answer
7
0
14
5
Question 4 of 39
Which type of bond is formed by the sharing of electron pairs between atoms?
Choose 1 answer
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
Question 5 of 39
What is the main component of natural gas?
Choose 1 answer
Ethylene
Methane
Propane
Butane
Question 6 of 39
Which element is commonly used in batteries due to its high reactivity?
Choose 1 answer
Lithium
Calcium
Sodium
Magnesium
Question 7 of 39
What is the atomic number of carbon?
Choose 1 answer
4
6
8
12
Question 8 of 39
Which of the following is a diatomic molecule?
Choose 1 answer
Oxygen
Carbon dioxide
Water
Ammonia
Question 9 of 39
What type of reaction occurs when an acid reacts with a base?
Choose 1 answer
Combustion
Synthesis
Neutralization
Decomposition
Question 10 of 39
Which of these elements is a metalloid?
Choose 1 answer
Aluminum
Silicon
Sulfur
Chlorine
Question 11 of 39
What is the common name for the compound H2O?
Choose 1 answer
Hydrogen peroxide
Water
Hydrochloric acid
Ammonia
Question 12 of 39
What is the molecular formula for glucose?
Choose 1 answer
C6H12O6
C5H10O5
C6H14O6
C6H12O5
Question 13 of 39
Which gas is produced when an acid reacts with a metal?
Choose 1 answer
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
Question 14 of 39
What is the process of a substance changing directly from a solid to a gas called?
Choose 1 answer
Condensation
Sublimation
Evaporation
Fusion
Question 15 of 39
Which of the following elements is essential for the formation of amino acids?
Choose 1 answer
Sulfur
Potassium
Nitrogen
Calcium
Question 16 of 39
What is the primary use of helium?
Choose 1 answer
Fuel in rockets
Cooling superconductors
Making plastic
As a fertilizer
Question 17 of 39
Which of the following compounds is known as table salt?
Choose 1 answer
Sodium chloride
Potassium iodide
Calcium carbonate
Magnesium sulfate
Question 18 of 39
What is the chemical formula for ozone?
Choose 1 answer
O2
O3
CO2
N2O
Question 19 of 39
What type of bond is present in a water molecule?
Choose 1 answer
Ionic bond
Metallic bond
Covalent bond
Hydrogen bond
Question 20 of 39
Which of the following is an example of a homogeneous mixture?
Choose 1 answer
Salad
Sand and salt
Salt water
Fruit punch
Question 21 of 39
What is the most abundant gas in the Earth's atmosphere?
Choose 1 answer
Oxygen
Carbon dioxide
Nitrogen
Argon
Question 22 of 39
Which element is commonly used in incandescent light bulbs?
Choose 1 answer
Tungsten
Aluminum
Copper
Zinc
Question 23 of 39
Which of the following acids is found in citrus fruits?
Choose 1 answer
Acetic acid
Citric acid
Lactic acid
Sulfuric acid
Question 24 of 39
What is the main component of the air we breathe?
Choose 1 answer
Oxygen
Nitrogen
Carbon dioxide
Argon
Question 25 of 39
What type of reaction is combustion?
Choose 1 answer
Exothermic
Endothermic
Redox
Decomposition
Question 26 of 39
Which of the following elements is a transition metal?
Choose 1 answer
Scandium
Boron
Oxygen
Sulfur
Question 27 of 39
What is the term for a solution that contains a high concentration of solute?
Choose 1 answer
Dilute
Saturated
Unsaturated
Supersaturated
Question 28 of 39
Which compound is commonly used as a disinfectant?
Choose 1 answer
Sodium bicarbonate
Hydrogen peroxide
Ethanol
Sodium chloride
Question 29 of 39
What is the name of the process where liquid water turns into vapor?
Choose 1 answer
Sublimation
Condensation
Evaporation
Freezing
Question 30 of 39
Which of these is a property of metals?
Choose 1 answer
Brittleness
Poor conductors of heat
Malleability
Dull appearance
Question 31 of 39
Which type of reaction involves the loss of electrons?
Choose 1 answer
Reduction
Oxidation
Neutralization
Hydrolysis
Question 32 of 39
What is the name of the scientist who developed the periodic table of elements?
Choose 1 answer
John Dalton
Dmitri Mendeleev
Marie Curie
Robert Boyle
Question 33 of 39
What is the term for a substance that speeds up a chemical reaction without being consumed?
Choose 1 answer
Catalyst
Reagent
Solvent
Buffer
Question 34 of 39
What is the main difference between an ionic and a covalent bond?
Choose 1 answer
Ionic bonds involve electron sharing, covalent bonds involve electron transfer
Ionic bonds involve electron transfer, covalent bonds involve electron sharing
Ionic bonds are weaker
Covalent bonds are more reactive
Question 35 of 39
What is the molecular weight of water?
Choose 1 answer
18 g/mol
32 g/mol
44 g/mol
56 g/mol
Question 36 of 39
Which of these is a common use for sulfuric acid?
Choose 1 answer
Battery acid
Food preservative
Cleaning agent
Agricultural pesticide
Question 37 of 39
What is the phase of matter where particles are close together but can move past each other?
Choose 1 answer
Solid
Liquid
Gas
Plasma
Question 38 of 39
Which of the following is a strong acid?
Choose 1 answer
Acetic acid
Citric acid
Hydrochloric acid
Carbonic acid
Question 39 of 39
What is the general name for the group of organic compounds that contain the -OH functional group?
Choose 1 answer
Aldehydes
Ketones
Alcohols
Ethers
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