1 Quinn is studying the reduction of alkyl halides. He knows that alkyl halides can be reduced to alkanes. What is the reducing agent for converting iodomethane (CH3I) to methane? A Zn/HCl B H2/Ni C NaBH4 D LiAlH4
2 Lara is studying basic oxides. She knows that basic oxides react with water to form bases. Which of the following is a basic oxide? A CO2 B SO2 C CaO D P2O5
3 Mohamed is learning about the conditions for equilibrium. He knows that concentration of reactants and products can affect the equilibrium position. According to Le Chatelier's principle, increasing the concentration of a reactant will: A Shift the equilibrium to the left B Shift the equilibrium to the right C Have no effect D Stop the reaction
4 Aisha is learning about organic compounds. She understands that carbon compounds are abundant in nature. Which of the following is a natural source of organic compounds? A Minerals B Petroleum C Metals D Salts
5 Zayn is learning about risk factors associated with pollution. He understands that long-term exposure to pollutants can cause health problems. Which of the following is a health risk of long-term exposure to air pollution? A Skin infections B Respiratory diseases C Muscle pain D Hair loss
6 Scatter plots are useful for showing: A Categories B Relationships between variables C Percentages D Titles
7 Khalid is studying acidic oxides. He knows that acidic oxides react with water to form acids. Which of the following is an acidic oxide? A CaO B MgO C CO2 D Na2O
8 Xia is studying the effects of climate change. She understands that climate change affects food production. How does climate change affect agriculture? A By increasing crop yields B By causing droughts and changing growing seasons C By improving soil quality D By reducing pests
11 Omar is learning about reversible reactions. He learns that the reaction: 2SO2 + O2 ⇌ 2SO3 is reversible. What happens if SO3 is removed from the system? A The equilibrium shifts to the left B The equilibrium shifts to the right C The reaction stops D There is no effect
12 Scientific data should be recorded: A Later from memory B Accurately at the time C Roughly D Without units
13 Laura is learning about the deficiency of carbohydrates. She understands that a lack of carbohydrates can lead to fatigue. What is a good source of complex carbohydrates? A White bread B Oats C Soda D Candy
14 Ahmed is collecting data on the pH of different solutions. He uses a pH meter to measure the pH. What type of data is pH measurement? A Qualitative data B Quantitative continuous data C Quantitative discrete data D Ordinal data
16 Which reaction is endothermic? A Heat is released B Heat is absorbed C No heat change D Always reversible
17 Fatima is studying strong acids. She knows that strong acids completely ionize in water. Which of the following is a strong acid? A HNO3 B H2CO3 C H3PO4 D CH3COOH
18 Oliver is studying the rate of a chemical reaction by measuring the change in concentration over time. He plots a graph of concentration vs. time. What can he determine from the slope of the graph? A The equilibrium constant B The rate of reaction C The activation energy D The enthalpy change
19 Ethan is studying the functions of carbohydrates. He learns that carbohydrates provide quick energy. Which of the following is a good source of quick energy? A Whole grains B Fruits C Sugar D Vegetables
21 Mohamed is learning about indoor pollution. He understands that indoor pollution can be caused by many sources. Which of the following is a common indoor pollutant from building materials? A Asbestos B Ozone C Methane D Sulfur dioxide
22 Which of the following is a chemical water pollutant? A Plastic waste B Oil spills C Bacteria D Algae
23 Yusuf is learning about alkalis. He knows that alkalis are soluble bases that release OH- ions in water. Which of the following is not an alkali? A NaOH B KOH C Cu(OH)2 D Ca(OH)2
24 Ahmed is learning about nutrition and healthy eating in his biochemistry class. His teacher explains that nutrition is the process of obtaining and using food for health. What is the main purpose of nutrition? A To provide energy and nutrients for growth and maintenance B To increase body weight only C To eliminate all fats from the diet D To consume only proteins
25 Omar is studying marasmus. He learns that marasmus is characterized by emaciation. What is emaciation? A Excessive weight gain B Severe thinness and wasting C Swelling of the stomach D Brittle hair
27 Waleed is learning about the importance of a healthy diet. He understands that a healthy diet can prevent many diseases. Which of the following is a disease that can be prevented by a healthy diet? A Diabetes B Heart disease C Obesity D All of the above
29 Ahmed is conducting an experiment to determine the boiling point of water. He records the temperature every minute. What type of data is Ahmed collecting? A Qualitative data B Quantitative data C Descriptive data D Observational data
30 Bilal is analyzing data from an experiment and finds that the data is not normally distributed. What does this indicate? A The data is perfectly symmetrical B The data may be skewed or have outliers C The data is invalid D The data has no variability