Unit Review
What do we call anything that has mass and takes up volume (space)
Matter
The distance between 2 crests or 2 troughs is called?
Wave length
Uninterrupted pattern of colours that is observed when a narrow beam of white light passes through a prism is called?
Continuous spectrum
In what model does electrons orbit the nucleus as the planets orbit the sun.
Bohr Model
A diagram showing both the chemical symbol and dots indicating the # of valence electrons is called?
Lewis symbol
Identify the reaction type shown and describe the clues that were used to identify it.
Fe2O3 + 2SiO2 → Fe2Si2O7
Synthesis
Which clue can be used to identify a chemical reaction as a decomposition reaction?
The reaction has a single reactant.
Na + Cl2 --> NaCl (unbalanced) How many moles of chlorine gas (Cl2) would react with 5.0 moles of sodium (Na) according to the following chemical equation?
2.5
In the balanced equation, the stoichiometric ratio between sodium (Na) and chlorine gas (Cl2) is 2:1.
Methane gas (CH4) gets burned in oxygen (O2) to form carbon dioxide (CO2) and water vapor (H2O). The balanced reaction is
C. CH4 + 2O2 --> CO2 + 2H2O
If 40g of ammonia reacts with 80.0g copper (II) oxide, determine the limiting reactant. Use nitrogen gas as your unknown.
Copper(II) oxide
Hydrocarbons are organic compounds with element
Hydrogen and carbon
The simplest member of organic compounds is?
[A] Methanol
[B] Methane
[C] Formaldehyde
[D] Formic acid
B.Methane
The hydrocarbon in which all the 4 valencies of carbon are fully occupied is called as
Alkane
Alcohol on refluxing with Cr2O7 gives
Carboxylic acid
Identify the one which on reaction with carboxylic acid at high temperature gives Ester?
[A] Ketone
[B] Alcohol
[C] Aldehyde
[D] Sugars
Alcohol
Which among the following is the main source of Soil and Water pollution?
a.Mining
b. Agro Industry
c.Thermal Power Stations
d.None of the above
c. Thermal Power Stations
Water pollution is indicated by
a.Amount of Nitrogen
b.Amount of BOD
c.Amount of Oxygen
d.Amount of Hydrogen
b.Amount of BOD
Which of the following gas is a major cause of ozone depletion?
a.Release of CO
b.Release of CFC
c.Release of CH4
d.Release of CO2
b. Release of CFC
The main constituents of the acid rain are
Sulphur and Nitrogen
What is the charge of aluminum cation?
a.+1
b.+2
c.+3
d.+4
C. +3
What process requires electrical energy to allow a nonspontaneous chemical redox reaction to occur?
C.Electrolysis
Where does oxidation half-reaction occur in a galvanic cell?
A.Anode
B.Cathode
C.Salt bridge
D.Either cathode or anode
A. Anode
Which of these metals has the highest oxidation potential in the electrochemical series?
A.Magnesium
B.Aluminum
C.Lithium
D.Copper
C. Lithium
What is the unit measure for the difference in chemical potentials between two electrodes of an electrochemical cell?
A.Volt
B.Ohm
C.Ampere
D.Coulomb
A. Volt