Question

The first few fractions obtained from the distillation of beer readily ignited because the distillate . a. has higher water content b. has higher ethanol content c. contains less volatile or higher-boiling component d. contains 100% beer What type of steam distillation technique is to be applied if a steam generated by an external source is passed through the material to be extracted? a. direct b. indirect c. variable d. both direct and indirect To wash off chemical which accidentally comes in contact with your skin, it is best to rinse the affected area with alcohol. Select one: True False Based on the results of the ignition test, the fraction which contain the highest ethanol content is the a. last fraction b. first fraction c. middle fraction d. all fractions When the filtered basic solution of the Lassaigne's Extract is treated with aqueous ferrous sulfate and ferric chloride, then boiled for a few minutes and acidified with sulfuric acid, a precipitate of Prussian blue is indicative of the presence of a. S b. Cl c. N d. Br Interchanging the water inlet and water ha no effect in the distillation process. Select one: True False What distillation method is most effective for the separation of essential oil from tanglad? a. simple b. fractional c. steam d. fractional and simple In the procedure, crude caffeine was purified through recrystallization. What was the solvent used in the recrystallization? a. acetone b. methylene chloride c. hydrochloric acid d. ethanol Which of the following components of tea leaves was not extracted during solid-liquid extraction? a. Tannins b. Chlorophyll c. Caffeine d. Cellulose In the distillation apparatus shown, what are the parts labeled A & B? a. A = Thermometer, B = Funnel b. A = Liebig condenser, B = Funnel c. A = Funnel, B = Thermometer d. A = Liebig condenser, B = Thermometer

The first few fractions obtained from the distillation of beer readily ignited because the distillate ________.
a. has higher water content
b. has higher ethanol content
c. contains less volatile or higher-boiling component
d. contains 100% beer

What type of steam distillation technique is to be applied if a steam generated by an external source is passed through the material to be extracted?
a. direct
b. indirect
c. variable
d. both direct and indirect

To wash off chemical which accidentally comes in contact with your skin, it is best to rinse the affected area with alcohol.
Select one:
True
False

Based on the results of the ignition test, the fraction which contain the highest ethanol content is the ________
a. last fraction
b. first fraction
c. middle fraction
d. all fractions

When the filtered basic solution of the Lassaigne's Extract is treated with aqueous ferrous sulfate and ferric chloride, then boiled for a few minutes and acidified with sulfuric acid, a precipitate of Prussian blue is indicative of the presence of
a. S
b. Cl
c. N
d. Br

Interchanging the water inlet and water ha no effect in the distillation process.
Select one:
True
False

What distillation method is most effective for the separation of essential oil from tanglad?
a. simple
b. fractional
c. steam
d. fractional and simple

In the procedure, crude caffeine was purified through recrystallization. What was the solvent used in the recrystallization?
a. acetone
b. methylene chloride
c. hydrochloric acid
d. ethanol

Which of the following components of tea leaves was not extracted during solid-liquid extraction?
a. Tannins
b. Chlorophyll
c. Caffeine
d. Cellulose

In the distillation apparatus shown, what are the parts labeled A & B?
a. A = Thermometer, B = Funnel
b. A = Liebig condenser, B = Funnel
c. A = Funnel, B = Thermometer
d. A = Liebig condenser, B = Thermometer

$The first few fractions obtained from the distillation of beer readily ignited because the distillate . a. has higher water content b. has higher ethanol content c. contains less volatile or higher-boiling component d. contains 100% beer What type of steam distillation technique is to be applied if a steam generated by an external source is passed through the material to be extracted? a. direct b. indirect c. variable d. both direct and indirect To wash off chemical which accidentally comes in contact with your skin, it is best to rinse the affected area with alcohol. Select one: True False Based on the results of the ignition test, the fraction which contain the highest ethanol content is the a. last fraction b. first fraction c. middle fraction d. all fractions When the filtered basic solution of the Lassaigne's Extract is treated with aqueous ferrous sulfate and ferric chloride, then boiled for a few minutes and acidified with sulfuric acid, a precipitate of Prussian blue is indicative of the presence of a. S b. Cl c. N d. Br Interchanging the water inlet and water ha no effect in the distillation process. Select one: True False What distillation method is most effective for the separation of essential oil from tanglad? a. simple b. fractional c. steam d. fractional and simple In the procedure, crude caffeine was purified through recrystallization. What was the solvent used in the recrystallization? a. acetone b. methylene chloride c. hydrochloric acid d. ethanol Which of the following components of tea leaves was not extracted during solid-liquid extraction? a. Tannins b. Chlorophyll c. Caffeine d. Cellulose In the distillation apparatus shown, what are the parts labeled A B? a. A = Thermometer, B = Funnel b. A = Liebig condenser, B = Funnel c. A = Funnel, B = Thermometer d. A = Liebig condenser, B = Thermometer$

Added by Jimmy R.

Question

Please give Ace some feedback