MDCAT Chemistry Chapter 8 Thermo-chemistry and Energetics of chemical reactions Online Test With Answers

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MDCAT Chemistry Chapter 8 Thermo-chemistry and Energetics of chemical reactions Online Test

Sr. # Questions Answers Choice
1 The oxidation state of carbon in C2O-²4 is +4 -4 +3 +2
2 The common oxidation number of halogens is -1 +1 -2 0
3 In SO-²4 the oxidation number of sulphur is -8 -6 +8 +6
4 In MgCl2, the oxidation state ofCI is Zero -2 +2 -1
5
In all oxidation reactions, atoms of an element in a chemical species lose electrons and increases their

 Oxidation states Reduction states Electrode Negative charges
6 The reaction which is responsible for the production of electricity in the voltaic cell is Hydrolysis Oxidation Reduction Redox
7 The element with highest E°red N F O CI
8 If a salt bridge is removed from two half cells the emf is Increased Decreased Dropped to zero Electrodes will be reversed
9 SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode Zn has less reduction potential than hydrogen and Cu <div>Zn has high reductionl potential than hydrogen</div><div>and Cu</div> <div>Zn is below electrochemical series than hydrogen and Cu</div><div><br></div> Zn has least tendency to lose electron
10 The electrochemical series is based on pH scale Redox scale Hdrogen scale Arrhenius scale
11 The potential of SHE is taken as zero which is avalue Reference Arbitrary Exact Experimental
12 The working condition/s for SHE 1atm pressure 1M H-solution 298K temperature All of these
13 The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute Oxidation reduction Redox reaction electrolysis
14 During the electrolysis of Fused NaCI, the products are Na and H2 Na and Cl2 Na and O2 H2 and Cl2
15 The products of electrolysis of which of the followings are known Fused electrolyte Aqueous solution of eleetrolyte Solid electrolyte Solid metal
16 Coinage metals Cu. Ag, and Au are the least reactive because they have Negative reduction potential Positive reduction potential Negative oxidation potential Positive oxidation potential
17 Only those metals can replace Hydrogen from dilute acids, which have High negative reduction potential Low negative reduction potential High positive reduction potential low positive reduction potential
18 Which one of the following metals can replace the Copper from aqueous solution of its salt more easily? Cd Fe Zn Na
19 The standard reduction potential of Zinc is 0.76V 0.34 -0.34V -0.76V
20 When a metal rod is dipped in its one molar ionie solution Electricity is produced Electricity is consumed Redox reaction occurs Potential difference is set up
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