Extracting oil from shale deposits a has been initiated on a large scale in the United States and will soon surpass Canada's pro
1 answer:
You might be interested in
<u>Answer:</u> Pairs are: (a) and (d), (b) and (f), (c) and (e)
<u>Explanation:</u>
In a periodic table, elements are arranged in 18 vertical columns known as groups and 7 horizontal rows known as periods.
Elements arranged in a group show similar chemical properties because of the presence of same number of valence electrons.
Valence electrons are defined as the electrons which are present in the outermost shell of an atom. Outermost shell has the highest value of 'n' that is principal quantum number.
For the given options:
- <u>For a:</u>
The given electronic configuration is:
The number of valence electrons in the given configuration are 2
- <u>For b:</u>
The given electronic configuration is:
The number of valence electrons in the given configuration are [2 + 3] = 5
- <u>For c:</u>
The given electronic configuration is:
The number of valence electrons in the given configuration are [2 + 6] = 8
- <u>For d:</u>
The given electronic configuration is:
The number of valence electrons in the given configuration are 2
- <u>For e:</u>
The given electronic configuration is:
The number of valence electrons in the given configuration are [2 + 6] = 8
- <u>For f:</u>
The given electronic configuration is:
The number of valence electrons in the given configuration are [2 + 3] = 5
Electronic configuration of (a) and (d) will form a pair, (b) and (f) will form a pair, (c) and (e) will form a pair and will have similar chemical properties.
Hence, the pairs are: (a) and (d), (b) and (f), (c) and (e)
<h2>Heptene formed is -</h2><h2>
</h2>
Explanation:
The two possibilities when the peroxide is not present
-
≡
→
+ HBr →
In presence peroxide,
≡
+ HBr →
- When peroxides are present in the reaction mixture, hydrogen bromide adds to the triple bond of heptane with regioselectivity.
- This reaction is opposite to that of Markovnikov's rule which says that when asymmetrical alkene reacts with a protic acid HX, then the hydrogen of an acid is attached to the carbon with more in number of hydrogen substituents, and the halide (X) group is attached to the carbon with more in number of substituents of alkyl.
- One mole of HBr adds to one mole of 1-heptane.
- The structure of heptene formed is -