Midterm Lab

Question 1

IUPAC name of acetylene

Answer 1

ethyne

Question 2

In acetylene, H-C=C-H bond angles is

Answer 2

180 degrees

Question 3

the chemicals used in preparation of acetylene

Answer 3

CaC2

H2O

Question 4

2 products formed in the preparation of acetylene

Answer 4

Ca(OH)2

C2H2

Question 5

Uses of Calcium Carbide

Answer 5

manufacture of acetylene gas
generation of acetylene in carbide lamps
artificial ripening of fruits
manufacture of chemicals for fertilizer
steelmaking

Question 6

components of calcium carbide

Answer 6

CaC2
CaO
Ca3P2
CaS
Ca3N2
SiC

Question 7

properties of acetylene

Answer 7

colorless, odorless, gas
garlic odor if not pure
lighter than air; somewhat poisonous
slightly soluble in water; highly soluble in alcohol and acetone
form explosive mixtures with air
boiling point -84 degrees celsius

Question 8

uses of sodium metal

Answer 8

manufacture of sodamide and esters
used to modify alloys
descale metals
lighting

Question 9

nature of flame produced when acetylene burns

Answer 9

luminous

Question 10

color of reaction of bromine water and acetylene

Answer 10

colorless

Question 11

uses of acetylene

Answer 11

portable lighting
fuel in cutting and welding
raw material for many organic compounds and plastics

Question 12

product of acetylene and sodium metal

Answer 12

sodium acetylide

NaC2H

Question 13

chemical formula of ethyne/acetylene

Answer 13

C2H2

Question 14

acidity of acetylene

Answer 14

highly acidic

Question 15

gas evolved when sodium metal was added to acetylene

Answer 15

H2

Question 16

final product of reaction of bromine and c2h2

Answer 16

1,2 - dibromoethene

Question 17

chemical formula of chloroform and iodoform

Answer 17

CHCl3

CHI3

Question 18

IUPAC of chloroform and iodoform

Answer 18

trichloromethane

triiodomethane

Question 19

Common name of chloroform and iodoform

Answer 19

methyl trichloride

methyl triiodide

Question 20

Color of chloroform and iodoform

Answer 20

colorless (CHCl3)

brown (CHI3)

Question 21

Odor of chloroform and iodoform

Answer 21

sweetish, ethereal (CHCl3)

unpleasant, medicinal (CHI3)

Question 22

Solubility of chloroform and iodoform with water

Answer 22

insoluble (Both)

Question 23

Solubility of chloroform and iodoform with alcohol

Answer 23

soluble (both)

Question 24

Solubility of chloroform and iodoform with ether

Answer 24

soluble (both)

Question 25

flammability of chloroform and iodoform

Answer 25

non-flammable (both)

Question 26

flame color of chloroform and iodoform

Answer 26

green (both)

Question 27

chlorides of chloroform and iodoform

Answer 27

AgCl (no ppt, 2 layers formed) - CHCl3 | no reaction - CHI3

Question 28

Uses of chloroform

Answer 28

anesthetic and sedative solvent for fats dry cleaning

Question 29

uses of iodoform

Answer 29

clean wounds antiseptic manufacture of pharmaceuticals

Question 30

other name of methanol

Answer 30

wood alcohol

Question 31

other name of ethanol

Answer 31

grain alcohol

Question 32

chemical formula of methanol and ethanol

Answer 32

CH3OH (methanol) | C2H5OH (ethanol)

Question 33

Common Name of methanol and ethanol

Answer 33

methyl alcohol | ethyl alcohol

Question 34

Color of methanol and ethanol

Answer 34

colorless (both)

Question 35

odor of methanol and ethanol

Answer 35

unpleasant (both)

Question 36

Solubility of methanol and ethanol in water

Answer 36

soluble (both)

Question 37

Solubility of methanol and ethanol in coconut oil

Answer 37

insoluble (both)

Question 38

Solubility of methanol and ethanol in camphor oil

Answer 38

``` slightly soluble (Ch3OH) soluble (C2H5OH) ```

Question 39

Solubility of methanol and ethanol in sugar

Answer 39

insoluble (both)

Question 40

flammability of methanol and ethanol

Answer 40

flammable (non-luminous) - methanol | flammable (luminous) - ethanol