General Knowledge Quiz - 8 Quiz

Challenge your understanding of basic chemistry with these engaging, easy questions. Explore elements, compounds, and essential reactions as you boost your science IQ.

1. Chemical Symbol for Water

   What is the chemical symbol for water?

   1. HO2
   2. CO2
   3. O2
   4. H2O

   Explanation: H2O is the chemical formula for water, consisting of two hydrogen atoms and one oxygen atom. O2 is oxygen gas, CO2 is carbon dioxide, and HO2 does not represent water.

2. King of Chemicals

   Which substance is commonly known as the 'king of chemicals' in basic chemistry?

   1. Acetic acid
   2. Sulfuric acid
   3. Hydrochloric acid
   4. Citric acid

   Explanation: Sulfuric acid is referred to as the 'king of chemicals' because of its wide industrial use. Hydrochloric acid and acetic acid have other uses, and citric acid is mainly found in citrus fruits.

3. Atomic Number of Hydrogen

   What is the atomic number of hydrogen?

   1. 1
   2. 2
   3. 8
   4. 11

   Explanation: Hydrogen has an atomic number of 1, making it the first element on the periodic table. 2 corresponds to helium, 8 to oxygen, and 11 to sodium.

4. Element Symbol Au

   Which element is represented by the symbol 'Au'?

   1. Gold
   2. Silver
   3. Aluminum
   4. Copper

   Explanation: The symbol 'Au' stands for gold. Silver is 'Ag', copper is 'Cu', and aluminum is 'Al'.

5. pH of a Neutral Substance

   What is the pH value of a neutral substance such as pure water?

   1. 7
   2. 3
   3. 0
   4. 10

   Explanation: A pH of 7 indicates a neutral substance. Values below 7 are acidic, above 7 are basic, and 0 or 14 represent extreme ends of the scale.

6. Main Component of Air

   What is the main component of the air we breathe?

   1. Nitrogen
   2. Oxygen
   3. Carbon dioxide
   4. Hydrogen

   Explanation: Nitrogen makes up the majority of Earth's atmosphere. Oxygen is the second most abundant, carbon dioxide is present in trace amounts, and hydrogen is very rare in the air.

7. Gas Released During Photosynthesis

   Which gas is released during the process of photosynthesis in plants?

   1. Carbon dioxide
   2. Nitrogen
   3. Methane
   4. Oxygen

   Explanation: Plants release oxygen in photosynthesis. Carbon dioxide is taken in, nitrogen is not produced in the process, and methane does not play a role here.

8. Boiling Point of Water

   At standard pressure, what is the boiling point of water in degrees Celsius?

   1. 50
   2. 100
   3. 212
   4. 0

   Explanation: At standard pressure, water boils at 100°C. 0°C is the freezing point of water, 50°C is not a melting or boiling point, and 212°F is the boiling point on the Fahrenheit scale.

9. Chemical Symbol for Potassium

   What is the chemical symbol for potassium?

   1. K
   2. Po
   3. P
   4. Pt

   Explanation: Potassium's symbol is 'K'. 'P' stands for phosphorus, 'Pt' for platinum, and 'Po' for polonium.

10. Table Sugar's Chemical Name

    What is the chemical name for table sugar?

    1. Glucose
    2. Sucrose
    3. Lactose
    4. Fructose

    Explanation: Table sugar is chemically known as sucrose. Glucose and fructose are simpler sugars, while lactose is found in milk.