Chemistry

Question 1

Which of the following scientists was awarded the Nobel Prize in
1911 for the discovery of the radioactive elements, radium and polonium?
w) John Dalton
x) Dmitri Mendeleev
y) Emil Fischer
z) Marie Curie

Answer 1

z) Marie Curie

Question 2

Who was awarded a Nobel Prize in 1911 for the discovery of the
radioactive elements, radium and polonium?

Answer 2

Marie Curie

Question 3

Which of the following pairs of German scientists discovered the
atomic fission of uranium and set the stage for the nuclear age?

w) Hahn and Strassman
x) Nernst and Planck
y) Ostwald and Heisenberg
z) Bohr and Rutherford

Answer 3

w) Hahn and Strassman

Question 4

Name the person who developed a table of elements which revealed
regularities in elemental properties in 1869?

w) Theodore Richards
x) Antoine Lavoisier
y) Dmitri Mendeleev
z) Svante Arrhenius

Answer 4

y) Dmitri Mendeleev

Question 5

Who was the first American chemist to receive a Nobel Prize? He
was selected in 1914 for his precise determination of atomic weights.
w) Edward Frankland
x) Theodore Richards
y) John Bardeen
z) Paul Dirac

Answer 5

Theodore Richards

Question 6

What is the maximum number of electrons that can occupy an s
orbital?

Answer 6

2

Question 7

Which of the following is a necessary characteristic for electrons that
share an s orbital?

w) coplanar spins
x) parallel spins
y) opposite spins
z) none of these

Answer 7

y) opposite spins

Question 8

Which of the following terms refers to the number of molecules or
ions attached to a central metallic atom?
w) coordination number
x) connection number
y) bonding number
z) none of these

Answer 8

w) coordination number

Question 9

Which of the following pairs do NOT show similar chemical
properties?
w) fluorine-argon
x) beryllium-aluminum
y) boron-silicon
z) lithium-magnesium

Answer 9

w) fluorine-argon

Question 10

What is the common name for calcium oxide, CaO?

Answer 10

Quicklime (Lime)

Question 11

Which of the following terms refers to a material which slows
neutrons?
w) retarder
x) moderator
y) buffer
z) bottleneck

Answer 11

Moderator

Question 12

Which of the following refers to the scattering of light by colloidal
particles?
w) Rutherford effect
x) Tyndall effect
y) Thompson effect
z) none of these

Answer 12

x) Tyndall effect

Question 12

Who is accredited in the history of modern chemistry of proving that
neutrons existed?

Answer 12

James Chadwick

Question 13

Which of the following refers to an easily melted product of the
reaction between the flux and the impurities of an ore?

w) slag
x) slurry
y) slug
z) none of the above

Answer 13

w) slag

Question 15

Name the thermodynamic state function that is a measure of
randomness.

Answer 15

Entropy

Question 16

What term is used to describe silver which contains 7.5% copper?

Answer 16

Sterling

Question 17

Name the state function that represents the heat content of a system.

Answer 17

Enthalpy

Question 18

Which of the following is NOT a physical property of crystalline
boron?
w) brown color
x) diamond hardness
y) brittleness
z) high electrical resistance

Answer 18

w) brown color

Question 19

Which noble gas has the highest melting point ? w) argon x) krypton y) xenon z) radon

Answer 19

z) radon

Question 20

The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Answer 20

ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER

Question 22

For which of the following classes of salts are all of its compounds soluble in water? w) sulfates x) nitrates y) hydroxides z) chlorides

Answer 22

NITRATES

Question 23

Which of the following is NOT a general property of hydroxide bases in aqueous solution? w) High solubility x) Bitter taste y) Ability to neutralize aqueous acid solutions z) Ability to change phenolphthalein from colorless to red

Answer 23

W -- HIGH SOLUBILITY (The hydroxides of the alkali metals are soluble in water but all the other metal hydroxides are only moderately or sparingly soluble.)

Question 24

Aqua regia is: w) concentrated nitric acid x) a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid y) concentrated hydrochloric acid z) a mixture of sulfuric acid and hydrochloric acid

Answer 24

x) a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid

Question 25

A solution with a pH of 12 is: w) weakly acidic x) strongly acidic y) weakly basic z) strongly basic

Answer 25

z) strongly basic

Question 25

What is the common name given to a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid?

Answer 25

Aqua Regia

Question 26

The halogen with the largest atomic radius is: w) Cl x) I y) Br z) At

Answer 26

z) At

Question 26

Which halogen has the largest atomic radius:

Answer 26

Astatine

Question 26

Compounds of iodine are NOT used for which of the following? w) as a refrigerant x) in photographic film y) as an essential part of diet z) as an antiseptic

Answer 26

w) as a refrigerant

Question 27

Allotropic modifications of phosphorus include each of the following EXCEPT: w) red phosphorus x) black phosphorus y) white phosphorus z) green phosphorus

Answer 27

z) green phosphorus

Question 28

How many milligrams are in one metric carat?

Answer 28

200 Milligrams

Question 29

What class of organic compounds is characterized by an -OH group bonded to an alkyl group?

Answer 29

Alcohol

Question 30

Which of the following contain sp2 hybridized carbon atoms? w) alkanes x) alkenes y) alkynes z) cycloalkanes

Answer 30

x) alkenes

Question 31

Which of the following phrases is NOT appropriate for a description of benzene? w) characteristic reactivity of an alkene x) volatile liquid y) aromatic hydrocarbon z) resonance hybridization

Answer 31

w) characteristic reactivity of an alkene

Question 32

Which of the following is NOT an aromatic hydrocarbon? w) naphthalene x) hexane y) styrene z) xylene

Answer 32

x) hexane

Question 33

Which of the following is NOT an aliphatic hydrocarbon? w) n-octane x) propylene y) n-tridecane z) benzene

Answer 33

z) benzene

Question 35

Which of the following is NOT a means of preparing carbon dioxide? w) burning coke in the absence of air x) combustion of methane y) heating certain normal carbonates z) action of acids on carbonates

Answer 35

w) burning coke in the absence of air

Question 36

After carbon, hydrogen, and oxygen, the next most abundant element in proteins is:

Answer 36

Nitrogen

Question 37

One of the following is NOT a lipid. Is it: w) fats and oils x) starches y) steroids z) waxes

Answer 37

Starches