1. Which hydrocarbon has the molecular formula C2H4?
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Quarter 4
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2. Which vitamin helps in blood clotting?
3. Quinn is learning about the preparation of alkanes by hydrogenation of alkenes. He knows that hydrogenation requires a catalyst. What is the role of the catalyst?
4. Hydrocarbons are organic compounds that contain:
5. Rania is studying the properties of nutrients. She learns that lipids are a concentrated source of energy. Which of the following is a source of lipids?
6. Which suffix is used for naming alkenes?
7. Emma is learning about incomplete combustion. She knows that when there is insufficient oxygen, carbon monoxide or carbon is produced. What is the effect of carbon monoxide on humans?
8. Which variable is deliberately changed in an experiment?
9. The functional group –OH represents:
10. Yara is studying the classification of carbohydrates. She understands that carbohydrates can be classified based on the number of sugar units. Which of the following is a disaccharide?
11. Which type of data is temperature?
12. Lara is studying the halogenation of methane. She knows that chlorine reacts with methane in the presence of UV light. What is the product when one chlorine atom substitutes one hydrogen atom?
13. Bilal is studying the preparation of alkanes. He learns that alkanes can be prepared by the reduction of alkyl halides. Which reagent is commonly used for the reduction of alkyl halides to alkanes?
14. Which is a disaccharide?
15. Amino acids are linked together by:
16. Fatima is conducting an experiment to determine the solubility of salt in water at different temperatures. She records the mass of salt dissolved. What is the independent variable in this experiment?
17. David is studying the cracking of larger hydrocarbons. He knows that cracking is used to produce smaller, more useful hydrocarbons. What is cracking?
18. Xia is learning about the importance of vitamins and minerals. She understands that they are essential in small amounts. Which of the following is a source of vitamin C?
19. General formula of alkanes is:
20. Zara is studying the combustion of alkanes. She knows that alkanes are used as fuels. Which of the following is a clean-burning fuel?
21. Khalid is learning about isomerism. He understands that isomers are compounds with the same molecular formula but different structures. Which of the following is an example of isomers?
22. Alkenes and alkynes are called unsaturated hydrocarbons because they:
23. Which best reduces experimental error?
24. Which compound is commonly used as cooking gas?
25. Chloe is learning about a balanced diet. She knows that a balanced diet provides all the necessary nutrients. What does a balanced diet include?
26. Which nutrient is mainly required for enzymes?
27. Fatima is analyzing her data and calculates the mode. What does the mode represent?
28. The main natural source of organic compounds is:
29. Deficiency of vitamin C causes:
30. The vertical axis of a graph usually represents: