What kind of reaction does the conversion of A to B represent? Addition reaction

Question

What kind of reaction does the conversion of A to B represent? Addition reaction. Substitution reaction. Oxidation-reduction reaction. Elimination reaction. Which of the following statements about the conformations of acyclic alkanes is true? Staggered conformations are at energy maxima and eclipsed conformation are energy minima. A staggered conformation with two larger groups 60 degree from each other is called anti. Gauche conformations are generally higher in energy than anti conformations. A staggered conformation with two larger groups 180 degree from each other is called gauche. Which of the following statements about valence electrons is true? They do not participate in chemical reactions. They are the outermost electrons. They are the most tightly held electrons. They reveal the period number of a second-row element. What is the ground-state electronic configuration of a carbon atom? 1s^2, 2s^2, 2p^4 1s^2, 2s^2, 2p^6. 1s^2, 2s^2, 2p^5 1s^2, 2s^2, 2p^2 What 2 things will change between two resonance structures? The placement of atoms and single bonds. The position of multiple bonds and single bonds. The placement of atoms and non-bonded electrons. The position of multiple bonds and non-bonded electrons.

Explanation / Answer

Q27.

B is losing OH- and H+, which is actually H2O, so we call this DEHYDRATION.... which is an ELIMINATION reaction, since it is being eliminated from the molecule

Q28

a) false, actually eclipsed fonromation have the most energy, since they are opposite to each other

b) false, anti, as the name implies, is the opposite, so 180

c) gauche --> true, since anti si the LEAST energetic requireing conformer

d) false, this is only 60° appart

Q29

a) false, they do! since they are far away from nucleus

b) true, since they are  far away from nucleus

c) false, since they are far away from nucleus, they have almost no interaction with nucleus

d) False, has nothing to do with it

Q39

for C --> 6 electrons,

1s2 fills up the first level

2nd levl --> 4 --> 2s2 since s must be filled first, then

2 electrons left --> 2 p2

so

1s2 2s2 2p2

Q31

resonance structure changes multiple bonding

a) is false, no change in atoms

b) true, they resonance

c) false, they will not change

d) false, they are all bonded

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