______11. The temperature of nitrogen gas contained in a not rigid vessel is reduced from 100°C to 5.0°C? Which of the following describes the resulting behavior of nitrogen gas molecules?
I. The average kinetic energy suddenly increases, thus the pressure increases. II. The average kinetic energy suddenly decreases, thus the pressure decreases. III.The volume occupied by the gas a molecule suddenly increases, thus the container expands.
IV. The volume occupied by the gas a molecule suddenly decreases, thus the container shrinks.
A. I & III B. II & IV C. I & IV D. II & II ______12. A balloon with a volume of 200 mL at 30°C is submerged in hot water to obtain a temperature of 50°C. Find out what will happen to the volume of the balloon, provided the pressure remains the same.
A. The volume of the balloon will become higher than 200 mL.
B. The volume of the balloon will become lower than 200 mL.
C. The volume of the balloon will stay the same.
D. There is not enough data
______13. A 2.0 g (approximately 0.045 moles) sample of dry ice (solid carbon dioxide) is placed in an evacuated 3.5 L vessel at 30°C. Compute for the pressure inside the vessel after all the dry ice has been converted to carbon dioxide gas. (R=0.0821 L. atm/mol.K)
A. 0.32 atm B. 0.45 atm C. 0.67 atm D. 1.0 atm
______14. What is the explanation to your answer in item number 13?
A. The gaseous form of dry ice exerts the same pressure with its environment because it adopts the atmospheric pressure.
B.The gaseous form of dry ice exerts lower pressure due to the bigger volume that results to lesser collisions of the gas particles.
C. the gaseous form of dry ice will have the same pressure because its composition remains the same
D. the gaseous form of dry ice will either have high or low pressure
______15. What do you expect to happen to the volume of a gas if its pressure is doubled and its temperature is reduced to half? Its volume
A. Its volume is doubled.
C. Its volume is decreased.
B. Its volume is increased.
D. Its volume remains unchanged. _______16.Which of the following is the major source of energy for the body? A. Lipids B. Proteins C. Nucleic Acids D. Carbohydrates
17. What biomolecule codes for the hereditary traits of the living organisms? A. Lipids B. Proteins C. Nucleic Acids D. Carbohydrates
18. Which of the following element is common to all biomolecules? A. Carbon B. Nitrogen C. Phosphorus D. Sulfur
19. Which of the following elements are present in proteins and nucleic acids but absent in carbohydrates and lipids? I. Carbon II. Hydrogen III. Phosphorus IV. Sulfur
A. I & II B. II & III C. III & IV D. I, II. III & IV
20. Which of the following is an example of monosaccharide?
A. Galactose B. Sucrose
C. Lactose D. Maltose
21. Which of the following is a formula of monosaccharide? A. CnH2n+2 B. CnH2n C. CnH2n-2 D. (CH2O)n 22. Which of the following is also known as the dextrose or blood sugar? A. Glucose B. Galactose C. Fructose D. Maltose​