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Org Chem > Exam > Flashcards

Exam Flashcards

1
Q

Boiling point of Benzyl alcohol

A

205

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2
Q

Boiling point of Glycerol

A

290

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3
Q

Boiling point of Ethylene alycol

A

197

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4
Q

Phenol bp

A

182

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5
Q

Benzaldehyde bp

A

178

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6
Q

Acetophenone bp

A

202

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7
Q

Nitrobenzene bp

A

211

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8
Q

Aniline bp

A

184

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9
Q

Phenyl acetate bp

A

196

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10
Q

Chlorobenzene bp

A

132

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11
Q

Methyl salieylate bp

A

223

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12
Q

0-Cresol bp

A

191

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13
Q

Ethyl benzoate bp

A

213

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14
Q

o-Toluidine bp

A

200

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15
Q

Bromobenzene bp

A

156

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16
Q

Aspirin melting point

A

135 c

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17
Q

Melting point of ice at 10 pressure

A

-0.06

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18
Q

Melting point of ice at 100 pressure

A

-0.7

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19
Q

Melting point of ice at 50 pressure

A

-0.35

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20
Q

Melting point of ice at 1 pressure

A

0

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21
Q

Melting point of ice at 89 pressure

A

-0.62

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22
Q

Melting point of ice at 25 pressure

A

-0.17

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23
Q

Melting point of ice at 65 pressure

A

-0.45

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24
Q

Melting point of ice at 78 pressure

A

-0.55

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25
Q

Which is the oxidizing agent used in the test for phosphorous?

A

Sodium peroxide

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26
Q

In the test for nitrogen, the sodium fusion extract is acidified with

A

Concentrated sulphuric acid

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27
Q

A X color precipitate, which is Y in ammonium hydroxide indicates presence of chlorine. Identify X and Y.

A

X = white, Y = soluble

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28
Q

Carbon and hydrogen are detected by heating the compound with which of the following?

A

Copper (II)oxide

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29
Q

Which compound gets precipitated in the detection of carbon and hydrogen?

A

Calcium carbonate

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30
Q

Identify the element that cannot be detected by Lassaigne’s test.

A

Fluorine

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31
Q

Potassium can replace sodium in lassaigne’s test.

A

True

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32
Q

What is Lassaigne’s test extract called as?

A

Sodium fusion extract

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33
Q

What is the color of the precipitate obtained in the test for sulphur?

A

Black

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34
Q

In case of both nitrogen and sulphur existence, Prussian blue is still the color of the end product.

A

False

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35
Q

A spot of the mixture is placed
near the bottom of a piece of
chromatography paper and the
paper is then placed upright in a
suitable
such as water,
alcohol and ether

A

Solvent

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36
Q

Separating dyes in an ink

A

Chromatography

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37
Q

Separating salt from sea water

A

Evaporation

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38
Q

Separating water and alcohol

A

Fractional distillation

39
Q

Separating soil mixed with water

A

Sedimentation

40
Q

Separating sand and water

A

Filtration

41
Q

separation by chromatography
include inks, dyes and colouring
agents in

A

Food

42
Q

are solids, liquids or gases

A

Organic compound

43
Q

are generally solids

A

Inorganic compounds

44
Q

low melting points & low boiling points

A

Organic compound

45
Q

high melting points & high boiling points

A

Inorganic

46
Q

shows covalent bonding

A

Organic

47
Q

mostly show ionic bonding

A

Inorganic

48
Q

Insoluble in water

A

Organic

49
Q

soluble in water

A

Inorganic

50
Q

usually decompose on heating
Volatile in nature

A

Organic

51
Q

Inflammable, easily catch fire

A

Organic

52
Q

Do not conduct electricity
slow to react with other chemicals

A

Organic

53
Q

Mostly Colorless compounds

A

Organic

54
Q

usually do not decompose on heating
non-Volatile in nature

A

Inorganic

55
Q

conduct electricity
Often undergo fast chemical reaction

A

Inorganic

56
Q

Mostly colorful compounds

A

Inorganic

57
Q

This test is used for the qualitative analysis of elements nitrogen, sulphur and halogen in Organic compounds.

A

Sodium fusion test

58
Q

refers to the formation of a new, insoluble product by a chemical reaction; this product then precipitates out of the reaction solution as an amorphous solid containing many trapped impurities.

A

Crystallization

59
Q

does not involve a chemical reaction; the crude product is simply dissolved into solution, and then the conditions are changed to allow crystals to re-form.This produces a more pure final product.

A

Recrystallization

60
Q

is a technique used to purify solid compounds where solids tend to be more soluble in hot liquids than in cold liquids.

A

Recrystallization

61
Q

refers to the process of removing brightly colored organic impurities from the sample mixture. The procedure is usually carried out in the solution phase after the solid product and impurities are dissolved in a suitable solvent.

A

Decolorization

62
Q

Separation by_____ involves gentle heating of the solid mixture in a confined container until the component with high vapor pressure changes into the vapor state, while the component with lower vapor pressure is left in the container.

A

sublimation

63
Q

an analogous process to boiling, as it occurs when a compound’s vapor pressure equals its applied pressure (often the atmospheric pressure).

A

Sublimation

64
Q

Compounds that are capable of sublimation tend to be those with

A

weak intermolecular forces in the solid state.

65
Q

holds the distilling mixture; preferably a round-bottom flask designed to withstand the required input of heat

A

Distilling flask

66
Q

a three-way connector directing the distilling vapor into the condenser and allows the connection of a thermometer via the thermometer adapter

A

Distilling head –

67
Q

– is the part where vapor will be cooled by a constant flow of water

A

Water condenser

68
Q

– connects the condenser to the receiving flask

A

Adapter

69
Q

– collects the distilled liquid

A

Receiving flask

70
Q

– used to hold the apparatus in place

A

Iron clamp and stand

71
Q

withdrawing or separating a substance from a mixture is done by the use of solvents

A

Solvent extraction

72
Q

In an extraction using a two-solvent system,_____ can be used to decrease the solubility of the non-polar component. This technique in reducing the solubility of organic solutes by saturating the mixture is called ____

A

methanol
Salting-out effect

73
Q

is a technique for separating the components or solutes, of a mixture on the basis of the relative amounts of each solute distributed between a moving fluid stream, called the mobile phase, and a contiguous stationary phase

A

Chromatography

74
Q

_____is a process for separating components of a mixture. To get the process started, the mixture is dissolved in a substance called the_____ phase, which carries it through a second substance called the stationary phase.

A

Chromatography

mobile

75
Q

is the temperature at which the vapor pressure of the substance equals the pressure of the atmosphere above it. It is a physical constant that can be used in identification and characterization, as well as a criterion of purity of a substance.

A

Boiling

76
Q

Pure compounds have a constant boiling point. Mixtures have a boiling point range except for______.

A

azeotropes

77
Q

Compounds involving____ bonds have_____ boiling point because the amount of heat required to separate the ions is higher than the amount required to separate molecules in covalent compounds.

A

Ionic
Higher

78
Q

Factors That Affect the Boiling Point

Strength of _______ _____
Length of ______
_______decreases the boiling point
______
_______

A

intermolecular forces
carbon-carbon chain
Branching
Polarity
Impurities

79
Q

Factors That Affect the Melting Point

________ Symmetry
a.______ _____(Linear vs Branched)

            b.\_\_\_\_\_ vs Even chain length

Molecular Size
a. Length of_______

Polarity/_____

A

Molecular

Conformation and Orientation

Odd

carbon-carbon chain

Intermolecular Forces
Impurities

80
Q

_____are substances that produce free hydrogen ions (H+ ions) when dissolved in water.

A

Acids

81
Q

______are substances that produce hydroxyl ions (OH- ions) when dissolved in water.

A

Bases

82
Q

_____solutions are rich in hydrogen ions and_____ solutions are poor in hydrogen ions.

A

Acidic

basic

83
Q

Substances with pH ____ than 7 are acidic, those with pH____ to 7 are neutral and those with pH_____ than 7 are basic in nature. The pH of pure water is ___

A

Lower
Equal
Greater
7

84
Q

is a strip of special paper that is prepared by dipping the strip in different chemical compounds and then drying it. It can be used to find the approximate pH of any solution.

A

pH paper

85
Q

is an electronic instrument consisting of a special bulb that is sensitive to hydrogen ions that are present in the test solution.

A

pH meter

86
Q

AgNO3

A

Silver nitrate

87
Q

NaCI

A

Sodium chloride

88
Q

CuO

A

Copper (II) oxide

89
Q

NaOH

A

Sodium hydroxide

90
Q

CaCO3

A

Calcium carbonate

91
Q

NaNO3

A

Sodium nitrate

92
Q

HN03

A

Nitric acid

93
Q

KSCN

A

Potassium thiocyanate

94
Q

Fe(NH4)(S04)2

A

Ammonium iron(II) sulfate

Org Chem (1 decks)

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