Exams & Certification

Standard Compound Literature Melting Point (°C) Benzophenone 48.1 Naphthalene 80.25 A = Adipic Acid 152-153°C B = Benzilic Acid 155-156°C C = Salicylic Acid 158-159°C Melting Point Naphthalene: 77.5-79.5°C Melting Point Benzophenone: 48.0-49.0°C Melting Point Unknown: 150.5-151.5°C Appearance of Unknown: White crystalline powder Appearance of Compound A: White crystalline solid Appearance of Compound B: White […]

What is the literature Melting Point for Benzoic Acid? The Melting Point for Benzoic Acid is 122 %€ What is the literature Melting Point for Acetanilide? The Melting Point for Acetanilide is 115*C The Correct Answer and Explanation is: Here are the correct literature melting points for both compounds: ✅ Benzoic Acid ✅ Acetanilide Note:If

What would happen if one were to move a bar magnet in and out of a coil of copper wire? A. The electric current would disappear. B. The magnet would not explode. C. The electric current would flow through the wire. D. It would not produce a gravitational field. The Correct Answer and Explanation is:

Describe what would happen to copper rod if were brought towards a bar magnet suspended from a thread The Correct Answer and Explanation is: Correct Answer:The copper rod would not be attracted to or repelled by the magnet. It would remain unaffected unless there is motion involved. Explanation: Copper is a non-magnetic metal, which means

If a bar of copper is brought near a magnet, what will happen to the copper bar? A. made into an induced magnet. B. unaffected by the magnet. C. attracted by the magnet. D. repelled by the magnet. The Correct Answer and Explanation is: Correct Answer: B. Unaffected by the magnet. When a bar of

The body of a tiger is made of many types of cells, such as muscle cells and nerve cells. All of the tiger’s cells are eukaryotic. What else is true about the tiger’s cells? The Correct Answer and Explanation is: Correct Answer:They have a nucleus and membrane-bound organelles. ExplanationThe body of a tiger, like that

The two alternative chair conformations of cis-1-bromo-2-methylcyclohexane differ in their Gibbs free energy. Using the data for 4G (Axial-Equatorial) for monosubstituted cyclohexanes at room temperature (25°C): Axial Equatorial Group AGo (kJ/mol) Group 46° (kJ/mol) C=N -0.8 NH2 CH3 5.9 22.4 -73 OH -3.9 L.2-gauche 3.8 Calculate the absolute value of the difference in the Gibbs

Chapter 3 (Structure: Isomers) 2B. Which best describes the most stable conformation of cis-1-chloro-4-isopropylcyclohexane? (A) The isopropyl group is equatorial, and the chloro group is axial. (B) The isopropyl group is axial, and the chloro group is equatorial. (C) Both the chloro and isopropyl group are equatorial. (D) Both the chloro and isopropyl group are

What is the energy difference between the two chair conformations of the following compound that is due to steric strain? cis-1-bromo-4-isopropylcyclohexane Assume the following 1,3-diaxial strains. Br: 1.0 kJ/mol CH(CH2): 4.6 kJ/mol 7.2 kJ/mol b. 5.6 kJ/mol c. 9.2 kJ/mol d. 11.2 kJ/mol 4. If the 1,3-diaxial strain for an ethyl group is 4.0 kJ/mol,

Draw two chair conformations of cis-1-bromo-4-isopropylcyclohexane. (b) Estimate the amount of strain in each conformation in kJ/mol. (c) What is the energy difference between them in kJ/mol? (d) Indicate which is the more stable. The Correct Answer and Explanation is: (a) Chair Conformations of cis-1-bromo-4-isopropylcyclohexane Since the compound is cis, both substituents—Br at C1 and