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MDCAT Chemistry Chapter 8 Thermo-chemistry and Energetics of chemical reactions Online Test MCQs With Answers
Question # 1
In all oxidation reactions, atoms of an element in a chemical species lose electrons and increases their
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Oxidation states
Reduction states
Electrode
Negative charges
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Question # 2
The oxidation state of carbon in C2O-²4 is
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+4
-4
+3
+2
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Question # 3
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 # 4
The element with highest E°red
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N
F
O
CI
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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
When a metal rod is dipped in its one molar ionie solution
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Electricity is produced
Electricity is consumed
Redox reaction occurs
Potential difference is set up
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Question # 7
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 # 8
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 # 9
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 # 10
In SO-²4 the oxidation number of sulphur is
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-8
-6
+8
+6
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Question # 11
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 # 12
The reduction potentials of non-metals are A =+0.54V, B=+1.08V, C=+1.36V. D= +2.87V Which non -metal can displace all other from aqucous solution of their salts
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A
C
B
D
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Question # 13
The potential of SHE is taken as zero which is avalue
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Reference
Arbitrary
Exact
Experimental
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Question # 14
Which of the following salts would give the same products irrespective of whether its molten form or concentrated aqueous solution is electrolysed?
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Magnesium bromide
Magnesium sulphate
Copper sulphate
Copper chloride
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Question # 15
Which of the following molecules has angel of 120°
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BeCl2
BF3
CH4
NH3
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Question # 16
Which of the following is an application of electrochemical series
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Prediction of the feasibility of chemical reaction
Calculation of the cell voltage
Prediction of reaction of metal with dilute acid
All of the above
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Question # 17
The element which has greatest value of Reduction potential is used as
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Strongest reducing agent
Weak oxidizing and strong reducing agent
Strongest oxidizing agent
None of these
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Question # 18
Stronger is the oxidizing agent, stronger is the
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emf of cell
Oxidation potential
Reduction potential
Reduction potential
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Question # 19
Molten lead and iead (II) bromide both conduct electricity. Which one of the following statements relating to this is true?
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Both undergo chemical change when they conduct
Both conduct by the movement of charge particles
Both will also conduct in the solid state
Both contain mobile electrons
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Question # 20
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 # 21
The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called
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Single electrode potential
electrode potential
Standard electrode potential
Standard hydrogen electrode
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