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MDCAT Chemistry Chapter 8 Thermo-chemistry and Energetics of chemical reactions Online Test MCQs With Answers
Question # 1
The cell which converts electrical energy to chemical energy is called
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Electrochemical cell
Voltaic cell
Galvanic cell
Down's cell
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Question # 2
The products of electrolysis of which of the followings are known
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Fused electrolyte
Aqueous solution of eleetrolyte
Solid electrolyte
Solid metal
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Question # 3
Coinage metals Cu, Ag and Au are the least reactive because they have
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Negative reduction potential
Negative oxidation potential
Positive reduction potential
Positive oxidation potential
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Question # 4
The electrochemical series is based on
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pH scale
Redox scale
Hdrogen scale
Arrhenius scale
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Question # 5
Which of the following bonds is not present in NH4CL
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lonic bond
Covalent bond
Co-ordinate covalent bond
De-localized covalent bond
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Question # 6
In which molecule. all atoms are coplanar?
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CH4
BF3
NH3
PH3
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Question # 7
The common oxidation number of halogens is
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-1
+1
-2
0
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Question # 8
Which one of the following elements is the strongest reducing agent?
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Chlorine
Sodium
Magnesium
Aluminium
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Question # 9
By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode
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H2
O2
Cu
CI
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Question # 10
Which one of the following metals can replace the Copper from aqueous solution of its salt more easily?
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Cd
Fe
Zn
Na
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Question # 11
Stronger the oxidizing agent, higher is
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Redox potential
Standard reduction potential
Reduction potential
Oxidation potemial
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Question # 12
If Cl2 is passed through hot NaOH. NaCIO3 is formed and the oxidation number of CI changes from
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-1 to 0
0 to +5
0 to-1
0 to +1
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Question # 13
The working condition/s for SHE
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1atm pressure
1M H-solution
298K temperature
All of these
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Question # 14
The emf produced by galvanic cell is called
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Cell potential
Oxidation potential
Redox potential
Reduction potential
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Question # 15
Which of the following best describes the shape and polarity of the carbon disulphide molecule?
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Bent and polar
Linear and non-polar
Pyramidal and polar
Bent and non-polar
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Question # 16
During space flights, astronauts ohlained water from
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Nickel cadmium cells
Lead accumulator
Fuel Cell
Alkaline battery
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Question # 17
Rusting of iron metal Fe occurs when Fe gets converted into Fe2O3 What happen with Fe?
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F'e is neutralized
Fe is sublimed
Fe is reduced
Fe is oxidized
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Question # 18
Which of the following statements is not correct about galvanic cell?
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Anode is negatively charged
Cathode is positively charged
Reduction occurs at anode
Reduction occurs at cathode
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Question # 19
Which molecule is least ionic"
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NaCI
HCL
HF
CsF
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Question # 20
On ascending the electrochemical series strength as reducing agent
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Increases
Decreases
Remains same
not determinable
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