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5 Written questions

5 Matching questions

  1. Draw functional group structure and give molecular formula for: Carbonyl.
  2. What two properties of water do plants take advantage of, to move water against gravity, explain?
  3. Describe the terms: solvent, solute, and solution.
  4. How many valence electrons does carbon have? How many single covalent bonds can it form?
  5. Draw functional group structure and give molecular formula for: Methyl.
  1. a Cohesion and Adhesion.
    Cohesion - waters ability to stick to ITSELF (other water molecules)
    Adhesion - waters ability to stick to OTHER THINGS that are POLAR
  2. b Methyl (−CH₃) (sex hormones, DNA methylation (when it gets tagged onto your DNA); C single bonded to 3 H's

    −C − H

    Ex: 5-methyl cytidine
  3. c Carbonyl (>CO) (ketones, aldehydes, sugars); C double bonded to O



    Ex: Acetone, the simplest ketone
  4. d Solvent: Substance doing the dissolving (water)
    Solute: Substance being dissolved (sugar or salt)
    Solution: homogenous mixture (product of solvent & solute)
  5. e 4 and 4

5 Multiple choice questions

  1. 1.) Structural - changes structural form; same formula, different structure
    2.) Geometric - differ in spatial arrangement due to inflexibility of double bond (two types: cis and trans) 3.) Enantiomers - mirror images of each other
  2. Hydrogen bonds are the bonds between two polar molecules - one with a partial positive charge and one with a partial negative charge; water is perfect for this because it has the partial negative of Oxygen and the partial positive of Hydrogen.
  3. H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)
  4. Hydrophilic - attracted to water; polar or ionic; has charge
    Hydrophobic - repels water; nonpolar; no charge
  5. Hydrogen bonds in water hold each other together stronger than they'd bond to the air, for example. Ex: Jesus Christ lizard can walk on water because of it's surface tension; a dragonfly has non-polar exoskeleton so water beads on it

5 True/False questions

  1. Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES!Yes. Ex: tiny tag from a functional group determines whether we are males or females


  2. Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa.Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².


  3. Organic molecules must always contain what?Carbon and Hydrogen


  4. What is specific heat?pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution


  5. What are functional groups? Names?Small organic molecules with great effects:
    Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl


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