記憶度
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問題一覧
1
Which separation technique is based on differences in the volatibility of the compounds to be separated?
distillation
2
which compound is an aldehyde?
III
3
A reaction in which a carboxylic acid reacts with an alcohol to form an organic compound and water is called ______
esterification
4
Which is the correct IUPAC name of the ff. compound?
5-bromo-3-ethylhept-3-ene
5
What is the position of the bromide atom relative to the methyl group in 3- bromotoluene?
ortho
6
Which compound is expected to be most soluble in water at 25 °C?
III
7
How many different alcohols have the molecular formula C4H10O?
4
8
What is the key stem in a recrystallization?
Dissolving the solid in a large quantity of cold solvent
9
In crystallization, the crystals phases can be inter-convertedby varying _______.
temperature
10
A constant boiling mixture of two or more components in a solution is called
azeotrope
11
Which species is the carbon-nitrogen bond the shortest?
CH3CN
12
How many hydrogen atoms are in one molecule of propene?
6
13
How many different compounds have the formula C5H12?
3
14
The smell of rancid butter is due to the presence of butyric/butanoic acid. What is the formula of this compound?
C4H8O2
15
The gentle oxidation of ethanol, CH3CH2OH, produces _________.
ethanoic acid, CH3CO2H
16
A common measure of efficiency in fractioning column is the _____
number of theoritical plates in the column
17
Which of the ff.funnels should be used to filter hot mother liquor during recrystallization?
Hirsch funnel
18
Which class of compounds consists exclusively of saturated hydrocarbons?
alkanes
19
Fractional distillation is different from distillation because of the presence of a _____
Fractional Column
20
In crystallization, the solution w/c is obtained after filtration is the
clear solution
21
Which compound is a tertiary alcohol?
I
22
Which is the correct molecular formula of the following molecule?
I
23
In which species are all the carbon atoms considered to be SP2 hybridized?
C2H4
24
Which of the ff. compounds has an ionic bond?
NH4Cl
25
Which of the ff. hydrocarbon has the lowest boiling point?
C4H10
26
The process of heating a liquid mixture to form vapors and then cooling the vapors to get pure component is called ____
Distillation
27
A compound is known to decompose at its boiling point. W/C of the ff. methods can be used to purify this substance?
Steam distillation
28
What is the hybridization of the carbon atom in a carboxyl group?
sp3
29
Which of the combination of reactants produces an ester?
acid and alcohol
30
Which compound has the highest boiling point?
IV