Topscore questions

[sajjy]

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Q1) A dog urine accident are cleaned up with newspaper followed by harsh discipline. the hides under a bed anytime the newspaper is brought out to read. this describes:
1) Operant conditioning (ans)
2) Classical conditioning

Why it is not classical?


Q2) Analogous structures are
a) similar in structure and similar in origin
b) dissimilar in structure and similar in origin
c) similar in structure and dissimilar in origin (ans)
d) dissimilar in structure and dissimilar in origin
e) found only in mammals

I thought it was D but its actually C

Q3) Which characteristics determines whether two liquids will be miscible?
a) Density
b) Electronegativity
c) Polarity (ans)
d) Molecular size
e) A & C

What about density?


Q4) Which of the following is incorrect as to what happens to each base when they are in aqueous solution?
a) LiOH -- Li+ + OH-
b) NH3 + H2O -- NH4+ + OH-
c) NaOH -- N+2 + OH-
d) Ba(OH)2 -- Ba+2 + 2OH-
e) C & D (ans)

No idea why E? Please explain

Q5) Which of the following can exist as meso compound?
a) cis-1,2-cyclopentanediol
b) trans-1,2-cyclopentanediol
c) 2,3-dihydroxybutane
d) A & B
e) A & C (ans)

Shouldnt this be C? But answer says E

 

[fleur531]

Q1) A dog urine accident are cleaned up with newspaper followed by harsh discipline. the hides under a bed anytime the newspaper is brought out to read. this describes:
1) Operant conditioning (ans)
2) Classical conditioning

Why it is not classical?


Q2) Analogous structures are
a) similar in structure and similar in origin
b) dissimilar in structure and similar in origin
c) similar in structure and dissimilar in origin (ans)
d) dissimilar in structure and dissimilar in origin
e) found only in mammals

I thought it was D but its actually C

Q3) Which characteristics determines whether two liquids will be miscible?
a) Density
b) Electronegativity
c) Polarity (ans)
d) Molecular size
e) A & C

What about density?


Q4) Which of the following is incorrect as to what happens to each base when they are in aqueous solution?
a) LiOH -- Li+ + OH-
b) NH3 + H2O -- NH4+ + OH-
c) NaOH -- N+2 + OH-
d) Ba(OH)2 -- Ba+2 + 2OH-
e) C & D (ans)

No idea why E? Please explain

Q5) Which of the following can exist as meso compound?
a) cis-1,2-cyclopentanediol
b) trans-1,2-cyclopentanediol
c) 2,3-dihydroxybutane
d) A & B
e) A & C (ans)

Shouldnt this be C? But answer says E

1. I was stumped by this one too! I did some googling and I finally came to the realization that operant conditioning is distinguished from classical conditioning by involving some kind of punishment or reward to reinforce a behavior. (Classical conditioning sounds more like an association - ex: Pavlov's dogs and the bells.) The owner hitting the dog with the newspaper is a punishment >> operant conditioning. Double check wiki for full length explanations between the two.

2. Homologous structures are similar in origin but different in structure - ex: flipper of whale and arms of humans. Analogous structures are dissimilar in origin but similar in structure - ex: wings of a bird and wings of a fly. Analgous structures are the result of similar evolutionary pressures.

3. Miscibility - think "like dissolves like" in terms of polarity --- you can think of how oil (nonpolar) and water (polar) don't really mix well.

4. Not sure... let me know if you figure this one out!!!

5. A is also part of the answer because a cis-molecule (due to the substitutents being on the same side) will have symmetry.

Hope that helps!!! Happy studying!

 

[TheWiredNerv]

I don't really remember why barium hydroxide doesn't dissociate the same way as other bases in water but I think it has something to do with how much stronger they are.

 

[Chga]

Correct me if im wrong
1. Operant = Behavior related
Classical = Physiological related
4.
c) NaOH -- N+2 + OH-
d) Ba(OH)2 -- Ba+2 + 2OH-
N+2 does not exist
and Barium Hydroxide is insoluble in water... there for it will stay a solid and not break up.

 

[fleur531]

Yup, that's it! barium hydroxide is insoluble.... I think the general solubility rule that is applied here is that metal hydroxides are insoluble... Barium is a metal, therefore barium hydroxide is insoluble.

 

[sajjy]

1. I was stumped by this one too! I did some googling and I finally came to the realization that operant conditioning is distinguished from classical conditioning by involving some kind of punishment or reward to reinforce a behavior. (Classical conditioning sounds more like an association - ex: Pavlov's dogs and the bells.) The owner hitting the dog with the newspaper is a punishment >> operant conditioning. Double check wiki for full length explanations between the two.

2. Homologous structures are similar in origin but different in structure - ex: flipper of whale and arms of humans. Analogous structures are dissimilar in origin but similar in structure - ex: wings of a bird and wings of a fly. Analgous structures are the result of similar evolutionary pressures.

3. Miscibility - think "like dissolves like" in terms of polarity --- you can think of how oil (nonpolar) and water (polar) don't really mix well.

4. Not sure... let me know if you figure this one out!!!

5. A is also part of the answer because a cis-molecule (due to the substitutents being on the same side) will have symmetry.

Hope that helps!!! Happy studying!

But the owner is not hitting the dog. He is using the newspaper to clean. though after cleaning a harsh action was taken.....
Pavlovian conditioning was "a bell was rung and food was provided which made the dog to salivate. Then even when the food was not provided but the bell was rung, the dog salivated. So the dog had developed that ringing of bell meant food."

In this case, the newspaper was used to clean, but then a harsh discipline was given. So the dog formed the relation that newspaper and harsh discipline comes together (same as bell and food). and thats why seeing a newspaper would remind him of the harsh discipline.

Any thoughts??