Circuits, Redox & Lights Open Notes
Through circuits, currents move and their direction matters a lot. This quiz tests on the different chemical circuits and in addition the redox reactions. These are those in which both oxidation and reduction occur. Al the best.
- 1.Metals readily ____________ electrons to form _______________ charged particles.
- A.
Lose, negatively
- B.
Lose, positively
- C.
Gain, negatively
- D.
Gain, postively
- 2.Oxidation is when electrons are _____________. The electrons are written on the right side of the reaction as ______________.
- A.
Lost, reactants
- B.
Lost, products
- C.
Gained, reactants
- D.
Gained, products
- 3.The ground state is:
- A.
When an ion or atom with an electron moves to a higher than normal energy level
- B.
The lowest energy level of atom or ion
- C.
The distance between successive crests of an electromagnetic wave
- D.
The number of times a point on a wave passes a fixed reference point in a second
- 4.Fluorsescence is
- A.
When an ion or atom with an electron moves to a higher than normal energy level
- B.
The lowest energy level of atom or ion
- C.
The emisison of light from a substance resulting from the immediate return of an electron to ground state
- D.
The emission of light from a substance resulting from the delayed return of an electron to ground state
- 5.In ROYGBIV, red has a wavelength corresponding to
- A.
700 nm
- B.
400 nm
- C.
1000 nm
- D.
200 nm
- 6.The relationship between wavelength and frequency is __________________ because when wavelength _______________, frequency decreases.
- A.
Direct, increases
- B.
Direct, decreases
- C.
Indirect, increases
- D.
Indirect, decreases
- 7.Why did the orange LED light NOT make the glow-in-the-dark star glow?
- A.
It's wavelength was too small
- B.
Its energy was too small
- C.
The electron moved to an excited state then had a delay in returning to ground state
- D.
The electron moved to an excited state and immediately returned to ground state
- 8.Solid lead (Pb) will react with ___________ if it is in the aqueous state.
- A.
Calcium, Ca
- B.
Zinc, Zn
- C.
Silver, Ag
- D.
Lithium, Li
- 9.Aqueous sodium (Na) will react with _________ in the solid state.
- A.
Lithium, Li
- B.
Magnesium, Mg
- C.
Tin, Sn
- D.
Mercury, Hg
- 10.In the reaction: Ag+ (aq) + Zn(s) --> Ag (s) + Zn2+ (aq) Ag is _____________ meaning it _______________ electrons.
- A.
Oxidized, loses
- B.
Oxidized, gains
- C.
Reduced, loses
- D.
Reduced, gains
- 11.In the reaction Ag+ (aq) + Zn(s) --> Ag (s) + Zn2+ (aq) electrons are transferred from ________ to __________.
- A.
Ag, Zn
- B.
Zn, Ag
- C.
Impossible to answer, electrons are not transferred
- 12.In the reaction: Cr3+ (aq) +Al(s) --> Cr (s) + Al3+ (aq) There is a transfer of
- A.
Electrons from Al to Cr3+
- B.
Electrons from Cr3+ to Al
- C.
Protons from Al to Cr3+
- D.
Protons from Cr3+ to Al
- 13.Which metal reacts spontaneoulsy with a solution containing zinc ions?
- A.
Potassium, K
- B.
Nickel, Ni
- C.
Copper, Cu
- D.
Silver, Ag
- 14.It is incorrect to say "When aluminum metal and copper ions were mixed the aluminum melted". Because Al is above Cu on the ____________________ it is correct to say they reacted.
- A.
Electromagnetic spectrum
- B.
Periodic table
- C.
Metal activity series
- D.
Electronegativity series
- 15.In the reaction: Cu2+ (aq) +Zn(s) --> Zn (s) + Cu2+ (aq) which equation represents the reduction half reaction?
- A.
Zn(s) --> Zn2+ + 2 e
- B.
Zn(s) + 2e --> Zn2+
- C.
Cu2+ (aq) + 2e --> Cu (s)
- D.
Cu2+(aq) --> Cu (s) + 2e
- 16.In the reaction: Na(s) + Pt+ (aq) --> Na + (aq) + Pt(s) Na is _________________ meaning it _______________ electrons.
- A.
Oxidized, loses
- B.
Oxidized, gains
- C.
Reduced, loses
- D.
Reduced, gains
- 17.Which wavelength of light has a higher energy?
- A.
700 nm
- B.
600 nm
- C.
500 nm
- D.
400 nm
- 18.Which color of visible light has a longer wavelength?
- A.
Orange
- B.
Green
- C.
Indigo
- D.
Violet
- 19.Electrons start out at a ____________ state and can move to an _____________ state when energized.
- A.
Negative, positive
- B.
Positive, negative
- C.
Ground, excited
- D.
Excited, ground
- 20.Electroplating is the
- A.
Production of a thin layer of metal on an object with electrolysis
- B.
Use of electricity to produce light
- C.
Use of fluorescence to produce phosphorescence
- D.
Lighting of an LED
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