Find the best tutors and institutes for Class 12 Tuition
Search in
Why is sulphuric acid not used during the reaction of alcohols with KI?
In the presence of sulphuric acid (H2SO4), KI produces HI
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_3fb52cd9.gif){kind=small}
Since _4-12-08_Utpal_12_Chemistry_10_6_GSX_html_735b8b5f.gif){kind=small}
is an oxidizing agent, it oxidizes HI (produced in the reaction to I2).
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m11a110a2.gif){kind=small}
As a result, the reaction between alcohol and HI to produce alkyl iodide cannot occur. Therefore, sulphuric acid is not used during the reaction of alcohols with KI. Instead, a non-oxidizing acid such as H3PO4 is used.
Write structures of different dihalogen derivatives of propane.
There are four different dihalogen derivatives of propane. The structures of these derivatives are shown below.
(i)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m6c17cb58.jpg){kind=small}
1, 1-Dibromopropane
(ii)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_138134ca.jpg)
2, 2-Dibromopropane
(iii)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m542ab460.jpg){kind=small}
1, 2-Dibromopropane
(iv)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_659fb72d.jpg){kind=small}
1, 3-Dibromopropane
Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields
(i) A single monochloride.
(ii) Three isomeric monochlorides.
(iii) Four isomeric monochlorides.
(i) To have a single monochloride, there should be only one type of H-atom in the isomer of the alkane of the molecular formula C5H12. This is because, replacement of any H-atom leads to the formation of the same product. The isomer is neopentane.
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_384e50bf.jpg)
Neopentane
(ii) To have three isomeric monochlorides, the isomer of the alkane of the molecular formula C5H12 should contain three different types of H-atoms.
Therefore, the isomer is n-pentane. It can be observed that there are three types of H atoms labelled as a, b and c in n-pentane.
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_6303f586.gif)
(iii) To have four isomeric monochlorides, the isomer of the alkane of the molecular formula C5H12 should contain four different types of H-atoms. Therefore, the isomer is 2-methylbutane. It can be observed that there are four types of H-atoms labelled as a, b, c, and d in 2-methylbutane.
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_c2e5e63.jpg)
Draw the structures of major monohalo products in each of the following reactions:
(i)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_5639edc8.jpg){kind=small}
(ii)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m1f8e0b9d.jpg)
(iii)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m4177ef94.jpg)
(iv)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m4c1682ee.jpg){kind=small}
(v)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_4e28e35b.jpg){kind=small}
(vi)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_11ad5542.jpg){kind=small}
(i)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m51e78382.jpg)
(ii)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m406402e4.jpg)
(iii)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m7675c028.jpg)
(iv)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m2e355842.jpg)
(v)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_41f3e480.jpg){kind=small}
(vi)
_4-12-08_Utpal_12_Chemistry_10_6_GSX_html_m53a407d9.jpg)
How helpful was it?
How can we Improve it?
Please tell us how it changed your life *
Please enter your feedback
UrbanPro.com helps you to connect with the best Class 12 Tuition in India. Post Your Requirement today and get connected.
Find best tutors for Class 12 Tuition Classes by posting a requirement.
Get started now, by booking a Free Demo Class
