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WAZZAP > Quiz 20 > Flashcards

Quiz 20 Flashcards

1
Q
  1. A liquid having a higher vapor pressure will have ________.

higher molecular weight

lower boiling point

higher boiling point

higher surface area

A

lower boiling point

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2
Q
  1. Which of the following properties indicates very strong intermolecular forces in liquids?

very low surface tension

very low critical temperature

very low boiling point

very low vapor pressure

A

very low vapor pressure

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3
Q
  1. The two strands of DNA are said to be

oppositely charged

complementary

identical

partners

A

complementary

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4
Q
  1. The amino acid sequence of a polypeptide chain comprises the _______ structure of the protein.

primary

secondary

tertiary

quaternary

A

primary

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5
Q
  1. An amino acid with a polar R group.

cysteine

phenylalanine

leucine

valine

A

cysteine

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6
Q
  1. An amino acid with a basic R group.

alanine

arginine

proline

glutamine

A

arginine

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7
Q
  1. An amino acid that is electrically neutral at pH 5.

aspartic acid

histidine

glycine

threonine

A

threonine

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8
Q
  1. An amino acid that will move towards the cathode at pH 10.

glutamic acid

tyrosine

alanine

valine

A

alanine

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9
Q
  1. A test for the presence of benzene ring in protein.

Biuret

Million’s

Hopkin’s Cole

Xanthoproteic

A

Xanthoproteic

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10
Q
  1. Protein presence in bones

collagen

fibroin

elastin

keratin

A

collagen

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11
Q
  1. How do you classify liquids that vaporized easily?

ideal liquid

saturated liquid

volatile liquid

osmotic liquid

A

volatile liquid

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12
Q
  1. Defines the classification of water resources

DAO 34

DAO 14

DAO 29

DAO 18

A

DAO 34

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13
Q
  1. In tubes having very small diameters, liquids are observed to rise or fall relative to the level of the surrounding liquid. What do you call this phenomenon?

fluidity

capillarity

surface tension

viscosity

A

capillarity

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14
Q
  1. Which of the following is not an SI unit?

meter

kilogram

angstrom

pasca

A

angstrom

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15
Q
  1. In the process of freeze drying, ice goes directly into water vapor. What is the temperature at which this process can take place?

above the triple point of water

any of the above, depending on the pressure

at the triple point of water

below the triple point of water

A

below the triple point of water

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16
Q
  1. It is the imaginary envelope which encloses the system and separates it from its surroundings.

boundary

control surface

control volume

interaction

A

boundary

17
Q
  1. The prefix giga is equivalent to

10^6

10^9

10^12

10^18

A

10^9

18
Q
  1. After engaging in a short, intensive burst of exercise, an athlete has

dehydration

electrolytes depletion

more slow-twitch muscle

an oxygen debt

A

an oxygen debt

19
Q
  1. Substances that absorb ultraviolet light and reemit it as a visible light are called

bleaches

optical brighteners

fabric softeners

water softeners

A

optical brighteners

20
Q
  1. “Laughing gas” can be decomposed into two simpler substances, nitrogen and oxygen. Therefore laughing gas

is an intoxicant

is a mixture

cannot be an element

has the formula NO

A

cannot be an element

21
Q
  1. A substance is oxidized if it

gains oxygen atoms

gains hydrogen atoms

gains electrons

all of these

A

gains oxygen atoms

22
Q
  1. The most abundant element on the Earth’ surface is

oxygen

carbon

hydrogen

silicon

A

oxygen

23
Q
  1. As the temperature of the reaction is increased, the rate of the reaction increases because the

reactant molecules collide less frequently

reactant molecules collide less frequently and with greater energy

activation energy is lowered

reactant molecules collide with greater energy

A

reactant molecules collide with greater energy

24
Q
  1. Which of the following will lower the activation for a reaction?

raising the temperature of the reaction

increasing the concentration of reactants

adding a suitable catalyst

all of these

A

adding a suitable catalyst

25
Q
  1. In a series of reactions, what is the rate determining step?

the main reaction involving the major reactant

the slowest reaction

the fastest reaction

the reaction with the highest order

A

the slowest reaction

WAZZAP (31 decks)

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