8743703
Descripción
Test por Momen Alma7sere , actualizado hace más de 1 año
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Creado por Momen Alma7sere
hace casi 8 años
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Pregunta 1
Pregunta
In sep- funnel we mixed the layer by?
Respuesta
-
Shaking
-
Filtration
-
Swirling
-
A+C
Pregunta 2
Pregunta
Why we add (Nacl) in extraction experiment?
Respuesta
-
To remove impurities
-
To wash the organic layer
-
To remove water
-
B+C
Pregunta 3
Pregunta
The position of fractionating colume?
Respuesta
-
Behind receive adapter
-
Between distilling flask and condenser
-
Between condenser and receive adapter
-
A+B
Pregunta 4
Pregunta
The function of
" glass beads"
in fractional colume?
Respuesta
-
provide large surface area
-
more efficient separate
-
To prevent boiling
-
A+B
Pregunta 5
Pregunta
The role of boiling chips?
Respuesta
-
Remove impurities
-
ensure smooth boiling
-
prevent bumping
-
B+c
Pregunta 6
Pregunta
The techniques that "chromatography"
depends on?
Respuesta
-
-absorption
-
-partition
-
-ion exchange
-
All of them
Pregunta 7
Pregunta
The rate of (sn1) reaction depends on?
Respuesta
-
Depend on the concentration of two of its reactants.
-
The concentration of one reactant
-
Depend on temperature
-
All of the above
Pregunta 8
Pregunta
T-butyl alcohol is more soluble in water than 1-butanol. Why?
Respuesta
-
Due to the big size of t-butyl
-
1-butanol more Electronegativity
-
T-butyl more branching
-
1-butanol have more hydrogen bonds
Pregunta 9
Pregunta
In alcohol reaction we add cold HCl.
Why cold?
Respuesta
-
To decrease the reaction temperature
-
To prevent formatting methyl propene
-
To increase the solubility
-
A+B
Pregunta 10
Pregunta
In sep-funnel we add NaHCo3 to the organic solution. why?
Respuesta
-
Its a base
-
To react with unreacted Hcl
-
To form neutral solution
-
All of the above
Pregunta 11
Pregunta
The function off adding Cacl to the organic solution?
Respuesta
-
To remove the acid
-
To remove the base
-
To remove water
-
All of the above
Pregunta 12
Pregunta
The rate of SN2 reaction rely on?
Respuesta
-
The concentration of one reactant
-
Temperature
-
Stability
-
Concentration of the two reactants
Pregunta 13
Pregunta
All of these are oxidation agents except
Respuesta
-
H2CrO4
-
Kmno4
-
Na2Cr2o7
-
NaHCo3
Pregunta 14
Pregunta
The way to obtain the aldehyde begor get over oxidation?
Respuesta
-
Uv
-
X ray
-
Color change
-
All of the above
Pregunta 15
Pregunta
2°and 3° alcohol can go over oxidation by
Respuesta
-
Drastic condition
-
Highly acidic condition Temperature and concentration
-
Adding Hcl
-
A+B
Pregunta 16
Pregunta
When the temperature of cyclohexanol rise to 40°c
We cool it why?
Respuesta
-
To prevent explode rhe solution
-
To prevent melting the compound
-
To prevent over oxidation
-
All of the above
Pregunta 17
Pregunta
Aspirin is a common name for :
Respuesta
-
Acetyl acid
-
Acetoxybenzoic Acid
-
Acetylsalicylic acid
-
Salicylic Acid
Pregunta 18
Pregunta
The usage of Salicylic acid is:
1) anti-inflammatory
2)anti pyretic
3)powerfull analogie
4)Repair offissues
Respuesta
-
1,2
-
1,2,3
-
1,3
-
All of the above
Pregunta 19
Pregunta
The material that binder Aspirin tablet
Respuesta
-
Starch
-
Buffer
-
Acetylsalicylic acid
-
Caffeine
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