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Ethers-book back questions
Choose
1. Metamerism
2. C2H5-O-C2H5
3. HI
4. Comparatively inert
5. Acidic
6. C2H5OC2H5
7. Diethylether
8. Nucleophilic substitution reaction
9. Peroxide
10.
Williamson’s synthesis
Pick out
1.c Halogenated ether on treating with alcohols forms higher ether
2.b the formula of diethyl oxonium chloride is (C2H5)2-O+Cl3. c In Williamson’s synthesis ether is formed using alkoxide and
alcohol
C. Answer in one or two sentences
1. Write the IUPAc names of
a.methoxy ethane
b.ethoxy benzene
2.Pg 186 formation of peroxide
3.Pg188 –with Grignard reagent
4.PG 184 wiliamson’s synthesis
5.C2H5 –O- C2H5 + H2O
Ethoxy ethane
6.Ethers do not form hydrogen bonding with water Hence they are
not soluble in water
7.Pg 189
8.Pg 191 Chemical properties (1)
9. Pg 192 First equation and explanation
10. Pg 190 last equation
Answer not exceeding 60 words
1.pg 183
2.184,185 any 3 methods
3.pg 190
4.a.pg 186
b.When diethyl is treated with excess hot conc HI ethyl iodide is
formed
C2H5 –O C2H5 + 2 HI -------------- 2 C2H5 I + H2O
c. Pg 189
d. Pg 188
5.Pg 192 points5 and 6 with equation
6.Pg 191,192 Reaction due to the benzene ring
7.Pg 191 chemical properties (2)
8.In diethyl ether, ether oxygen is capable of forming a co ordinate
covalent bond with electron deficient species. Thus diethyl ether
forms peroxide by the action of oxygen.
C2 H5-O C2H5 + O ------------ C2H5 –O-C2H5
l
O
Whereas in anisole the oxygen is not able to form co ordinate
covalent bond with oxygen because of delocalisation of π electrons
in benzene ring. Due to delocalisation the electron present on the
oxygen is not readily available for donation. The carbon oxygen
bond assumes some double bond character, that is the C-O bond
becomes strong. So anisole does not form peroxide easily.