#1
Which of the following is a correct chemical formula for water?
H2O
ExplanationWater consists of two hydrogen atoms bonded to one oxygen atom.
#2
What is the chemical name for common table salt?
Sodium chloride
ExplanationCommon table salt is composed of sodium ions (Na+) and chloride ions (Cl-).
#3
Which of the following is a noble gas?
Helium
ExplanationHelium belongs to the noble gas group of elements, known for their inert nature.
#4
What is the chemical name for baking soda?
Sodium bicarbonate
ExplanationBaking soda is chemically known as sodium bicarbonate.
#5
Which chemical element is a key component of rust?
Iron
ExplanationRust is primarily composed of iron oxide, formed by the oxidation of iron.
#6
What is the molecular formula for glucose?
C6H12O6
ExplanationGlucose is a simple sugar with the chemical formula C6H12O6.
#7
Which chemical compound is commonly known as 'vinegar'?
Acetic acid
ExplanationVinegar is primarily composed of acetic acid.
#8
What is the chemical formula for sulfuric acid?
H2SO4
ExplanationSulfuric acid is composed of two hydrogen atoms, one sulfur atom, and four oxygen atoms.
#9
What is the chemical formula for hydrogen peroxide?
H2O2
ExplanationHydrogen peroxide consists of two hydrogen atoms and two oxygen atoms.
#10
Which of the following is a halogen?
Chlorine
ExplanationChlorine belongs to the halogen group of elements.
#11
What is the chemical formula for methane?
CH4
ExplanationMethane consists of one carbon atom bonded to four hydrogen atoms.