1 |
What products is formed when ethyl bromide reacts with magnesium to form Grignard's reagent. |
Pyridine
Anhydrous ether
Ethyl alcohol
Carbon tetrachloride
|
2 |
Which substance is used to convert Grignard reagent to alkane. |
H2O
NH3
Ethyl alcohol
All of these
|
3 |
Which one of the following molecules does not form alcohol when reacts with a Grignard reagent. |
Formaldehyde
Acetaldehyde
Propanone
CO2
|
4 |
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone. |
Primary alcohol
Secondary alcohol
Tertiary alcohol
Dehydrin alcohol
|
5 |
Which one of the following alkanes will be formed by the hydrolysis of ethyl magnesium bromide |
Methane
Ethane
Butane
do not hydrolysed
|
6 |
Acetic acid can be obtained from CH3MgI by treatment with. |
H2O
CINH2
CO2
HCHO
|
7 |
The general representation for Grignard reagent is. |
RMgX
ReMgX
RXMg
RMgX2
|
8 |
Which alkyl halide does not form Grignard's reagent. |
CH3-Br
CH3-Cl
CH3- F
CH3-I
|
9 |
Which one of the following will be required to form ethene from ethyl chloride. |
Alcoholic KOH
Aqueous KOH
Alkaline KMnO4
Bromine
|
10 |
Which one of the following reactants will be required to form ethyl alcohol form ethyl bromide. |
Alcoholic KOH
Aqueous KOH
Alkaline KMnO4
Sodium metal in ether
|
11 |
Which one of the following products will be formed in Wurtz reaction when sodium metal reacts with ethyl chloride in anhydrous ether. |
Methane
Ethane
Propane
Butane
|
12 |
The reaction of alkyl halides with sodium metal in the presence of ether to from alkane is known as. |
Wortz reaction
Frankland reaction
Sabatier sendron
Kolbe's synthesis
|
13 |
An alkyl halide may be converted to alcohol by |
Addition
Substitution
Dehydrohalogenation
Elimination
|
14 |
Which one of the following species is not an electrophile. |
HN3
Br
H+
BF3
|
15 |
In unimolecular reactions, the reaction completes in |
<sub>One step</sub>
Two steps
Three steps
None of these
|
16 |
Which one of the following species is a nucleophile |
CH3
(CH3)2 C
BF3
OH-
|
17 |
SN2 mechanism involves |
1st order kinetic
2nd order kinetic
3rd order kinetic
Zero order kinetic
|