The Language of Chemistry Quiz - ICSE Class 9 Chemistry
Free practice quiz: The Language of Chemistry (ICSE Class 9 Chemistry). 52 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
This ICSE Class 9 Chemistry practice quiz has 52 multiple-choice questions on The Language of Chemistry, and 52 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.
Start quiz: 52 questions, freeSample questions
Which of the following is an example of a chemical symbol that represents an element discovered in the 20th century?
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Answer: C. Tc
Au represents Gold, discovered long before the 20th century. Fe represents Iron, also known since antiquity. Cu represents Copper, another element known since antiquity. Tc represents Technetium, which was first synthesized in the 20th century.
In the chemical formula for iron(III) chloride, what does the Roman numeral 'III' indicate?
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Answer: B. The charge of the iron ion
Roman numerals in the names of ionic compounds indicate the oxidation state (charge) of the metal cation when the metal can form ions with multiple charges. Iron(III) chloride indicates iron with a +3 charge (Fe^3+).
The chemical formula for sulfuric acid is H2SO4. The '2' following H indicates:
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Answer: C. The number of hydrogen atoms
In a chemical formula, subscripts indicate the number of atoms of the preceding element. Therefore, the subscript '2' in H2SO4 signifies two hydrogen atoms.
If an atom has an atomic number of 17 and a mass number of 35, how many neutrons does it have?
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Answer: B. 18
The atomic number is equal to the number of protons. The mass number is the sum of protons and neutrons. Number of neutrons = Mass Number - Atomic Number = 35 - 17 = 18.
The chemical formula for carbon dioxide is CO2. What does the subscript '2' indicate?
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Answer: B. The number of oxygen atoms
The subscript '2' in CO2 indicates that there are two atoms of oxygen.
More questions in this quiz
Answers and explanations are in the full quiz.
- If a chemical formula is written as H2SO4, what does the subscript '4' signify?
- What is the correct IUPAC name for a molecule with the formula C2H6?
- Which of the following is NOT a valid chemical formula for a simple ionic compound?
- A chemical equation is said to be balanced when:
- Consider the reaction: 2H2 + O2 → 2H2O. What are the coefficients in this balanced equation?
- Which of the following is an example of a polyatomic ion?
- When naming an ionic compound consisting of a metal and a nonmetal, the metal's name is generally:
- The chemical formula for calcium carbonate is CaCO3. What type of compound is this?
- Which of the following represents a diatomic molecule?
- The chemical symbol 'P' represents which element?
- Which of the following is a molecular formula that represents a compound with a single carbon atom and four hydrogen atoms?
- When balancing the chemical equation N2 + H2 → NH3, what are the smallest whole number coefficients that balance the nitrogen and hydrogen atoms respectively?
- The chemical name for the compound with the formula K2SO4 is:
- What does the Greek prefix 'tri-' signify in a chemical name like carbon trioxide?
- Which element has the chemical symbol 'Ag'?
- If a chemical formula is written as C6H12O6, it represents a molecule composed of:
- Consider the reaction: 2Na + Cl2 → 2NaCl. This equation demonstrates the Law of Conservation of Mass because:
- Which of the following is the correct chemical formula for magnesium chloride?
- What is the common name for the compound with the formula CO?
- The chemical symbol 'K' is derived from which Latin name?
- Which of the following represents a polyatomic cation?
- Consider the unbalanced equation: Fe2O3 + C → Fe + CO2. To balance this equation, which coefficient should be placed in front of Fe2O3?
- The chemical formula for aluminum oxide is Al2O3. This indicates that:
- What is the correct IUPAC name for SO2?
- The chemical symbol for sodium is:
- In the chemical formula P4O10, the subscript '4' refers to:
- Which of the following is an example of a metallic element?
- Consider the reaction: CH4 + 2O2 → CO2 + 2H2O. Which element is represented by the symbol 'C'?
- Which chemical formula represents a compound made of aluminum ions (Al^3+) and bromide ions (Br^-)?
- The prefix 'di-' in the chemical name sulfur dioxide (SO2) signifies:
- Which of the following is the correct chemical formula for potassium nitrate?
- Consider the balanced equation: 2H2 + O2 → 2H2O. If we start with 4 molecules of H2 and 2 molecules of O2, how many molecules of H2O will be produced?
- Which of the following pairs correctly matches a chemical symbol with its element name?
- What is the chemical formula for magnesium hydroxide?
- The chemical formula for methane is CH4. What is the correct name for a compound with the formula C2H4?
- In the chemical equation: 2H2O → 2H2 + O2, the reactants are:
- Which element has the chemical symbol 'S'?
- What is the charge of the sulfate ion?
- Balance the following equation: Al + O2 → Al2O3
- Which of the following is an example of a metal whose symbol is not derived from its English name?
- What is the correct chemical formula for iron(II) sulfate?
- Which of the following represents the chemical formula for water?
- The chemical name for the compound with the formula CO2 is:
- If an atom has 11 protons and 12 neutrons, what is its mass number?
- What is the chemical symbol for the element Helium?
- Which of the following is a monatomic ion?
- What is the correct chemical formula for aluminum sulfate?
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