The second period contains how many elements?
A2
B4
C6
D8
ESAS · Question Bank
Chemistry
340 of 345 questions match · page 17 of 17. Answer in your head first, then check the solution.
The opposite of alkali
AAcid
BBase
CFluid
DSubstance
In electrochemistry, oxidation is a loss of ____
AElectron
BProton
CIon
DAnode
What is the metal used to recover copper from a solution of copper sulphate?
ANa
BAg
CHg
DFe
The Group VIII elements, called the noble or rare gases, have the following property
AThey are rare.
BThey do not react with other elements
CThey are lighter than air
DAll of these
The chemical name of baking soda is
ASodium bicarbonate
BSodium phosphate
CSodium chloride
DSodium carbonate
Formula for Calcium Chloride
ACaCl2
BCa2Cl
CCaCl
DCaCl3
What is the chemical formula of Sulfuric acid?
AHSO4
BH2SO4
CH3SO2
DHSO2
What is the oxidation number of Cr in the dichromate ion \((\text{Cr}_2\text{O}_7)^{2-}\)?
A1
B0
C2.5
D6
Which of the following elements are stored in oil to prevent explosions?
ALithium
BActinium
CYtterbium
DStrontium
Gold has an atomic number of
A52
B57
C67
D79
In molecules of the same composition, what are the variation of atomic arrangements known as?
APolymers
BMonomers
CIsomers
DCrystal systems
What acid is added to carbonated drinks to produce a tart taste?
ACitric acid
BPhosphoric acid
CSulphuric acid
DNitric acid
What is the only gas in Group VIA in the periodic table?
AArgon
BKrypton
COxygen
DHelium
When gases expand and mix with other gases to fill available space, it is called
AVaporization
BEvaporation
CSolidification
DDiffusion
In molecules of the same composition, what are variations of atomic arrangements known as?
APolymers
BMonomers
CIsomers
DCrystal systems
Which is also called stranger gas?
AXenon
BNeon
CArgon
DNitrous oxide
The hardest form of carbon is
ACoke
BGraphite
CDiamond
DCharcoal
What is the process of putting back the lost electrons to convert ion back to a metal?
AOxidation
BCorrosion
CReduction
DIonization
Metalloids have a valence of ____
A3
B4
C5
DUnity