1 Scatter plots are useful for showing: A Categories B Relationships between variables C Percentages D Titles
2 George is studying the effect of acid concentration on the rate of reaction with magnesium. He measures the volume of hydrogen gas produced. What is the dependent variable in this experiment? A Acid concentration B Volume of hydrogen gas produced C Mass of magnesium D Temperature
4 Qasim is learning about the functions of food components. He understands that proteins are important for growth and repair. Which of the following is a source of protein? A Rice B Chicken C Butter D Sugar
7 Which protein structure refers to a chain of amino acids? A Primary structure B Secondary structure C Tertiary structure D Quaternary structure
8 Vera is studying marasmus. She learns that marasmus is a severe form of malnutrition. What is the main cause of marasmus? A Lack of protein B Lack of calories and protein C Lack of vitamins D Lack of minerals
9 Which colour component usually moves slowest? A Most soluble B Least adsorbed C Strongly adsorbed D Lightest
11 Bilal is observing the color change of a solution during a chemical reaction. He notes that the solution turns from colorless to blue. What type of data is Bilal collecting? A Quantitative data B Empirical data C Qualitative data D Theoretical data
12 Which test helps confirm CO₃²⁻ ion? A Silver nitrate test B Flame test C Limewater test D Biuret test
16 Waleed is studying the deficiency of lipids. He learns that a lack of essential fatty acids can lead to health problems. Which of the following is a source of essential fatty acids? A Fish oil B Coconut oil C Butter D Lard
18 Which is an application of chromatography? A Detecting food dyes B Measuring mass C Heating chemicals D Cooling solutions
19 Which phase remains fixed in chromatography? A Mobile phase B Liquid phase C Stationary phase D Gas phase
20 Patricia is collecting data on the boiling points of different liquids. She uses a thermometer that is not calibrated correctly. What type of error is this? A Random error B Systematic error C Human error D Gross error
22 Carlos is studying nucleic acids. He learns that DNA and RNA are polymers of nucleotides. What is the sugar found in DNA? A Ribose B Deoxyribose C Glucose D Fructose
24 Which improves precision? A Repeating measurements B Changing instruments C Ignoring units D Single reading
25 Which vitamin group is called B-complex? A Fat soluble vitamins B Water soluble vitamins C Steroid vitamins D Hormonal vitamins