Quiz 19 Flashcards
- Which element can take part in hydrogen bonding?
F
O
N
all of the above
all of the above
- Only dispersion forces are present in _____.
HF
C6H6
CO
C2H5OH
C6H6
- Polarizability is highest for ______.
CH4
H2
CCl4
H2S
CCl4
- A compound which hydrogen bonds is ______.
BeH2
CH4
CH3COOH
C2H6
CH3COOH
- The hydrocarbon having the lowest boiling point is _____.
C4H10
CH4
C6H6
C2H6
CH4
- Which of the following has the lowest boiling point?
CH3COCH3
CH3OCH3
CH3COOH
CH3CHO
CH3OCH3
- The boiling point of a liquid depends on ______.
external pressure
molecular attraction
molecular weight
all of the above
all of the above
- The vapor pressure of a liquid is _______.
inversely proportional to temperature
directly proportional to temperature
directly proportional to boiling point
directly proportional to melting point
directly proportional to temperature
- The vapor pressure of a liquid depends on the _______.
amount of liquid
volume of the liquid
temperature of the liquid
surface area of the liquid
temperature of the liquid
- Which of the following factors will not affect the rate of vaporization of the liquid?
temperature
amount of liquid
intermolecular forces
surface area
amount of liquid
- What is the name of the following alkene? CH3—CH2—CH = CH—CH3
3-pentene
2-pentane
pentene-2
2-pentene
2-pentene
- What is the name of the following compound?CH3—CH2—CH(OH)—CH3
3-butanol
2-butanol
3-pentanol
2-pentene
2-butanol
- Which is not a correctly named alkyl group?
C2H5 – ethyl
C3H7—propyl
C4H10– butyl
CH3 – methyl
butyl
- What is the name of the following compound? CH3—CH2—CH(CH3)—CH(CH3)—CH2—CH3
3,4-dimethylhexane
3-butylbutane
3-methyl 4-ethylpentane
3,5-octane
3,4-dimethylhexane
- What is the basic formula of an alkyne of n carbon atoms?
CnH2n+2
CnH2n
CnH2n-2
CnHn
CnH2n-2
- What characterizes a starch?
it is a collection of polysaccharides in plants
it is a cellulose
it is a trisaccharide
it has six carbons
it is a collection of polysaccharides in plants
- CH2O is the empirical formula for
amino acids
proteins
Carbohydrates (sugar)
aldehydes
DNA and RNA
Carbohydrates (sugar)
- A student observed that a small amount of acetone sprayed on the back of the hand felt very cool compared to a similar amount of water. Your explanation of this phenomena be that
all organic compound do this
acetone has a lower viscosity and transfers heat quanta better
water has a higher heat capacity than acetone, therefore retaining more heat
the higher vapor pressure of acetone results in more rapid evaporation and heat loss
the observed effect is not real and is only imagined
the higher vapor pressure of acetone results in more rapid evaporation and heat loss
- When a pot of water boils on the stove, small bubbles form at the bottom of the pan and rise to the surface. What is inside these bubbles?
steam
hydrogen gas
oxygen gas
a vacuum
air
steam
- A document issued by the DENR secretary indicating that the proposed project will cause significant negative environmental impact.
Environmental Impact Statement
Environmental Impact Assessment
Environmental Compliance Certificate
Environmental Critical Project
Environmental Compliance Certificate
- In testing a substance for the presence of glucose, it should be heated with
Benedict’s solution
Burrough’s solution
iodine solution
glycagon
Benedict’s solution
- What is produced when calcium carbide is mixed with water?
acetylene
ethylene
propylene
methane
acetylene
- Acids are substances that increase the concentration of the positive ions characteristic of the solvent
The above statement is correct
The above statement is incorrect
Acids cannot be defined this way
Is partially true
Acids cannot be defined this way
- In the chemical reaction N2 + 3H2 2NH3 at equilibrium point
Equal volumes of N2 and H2 are reacting
Equal masses of N2 and H2 are reacting
The reaction has stopped
The same amount of ammonia is formed as is being decomposed into N2 and H2
The same amount of ammonia is formed as is being decomposed into N2 and H2
