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MDCAT Chemistry Chapter 8 Thermo-chemistry and Energetics of chemical reactions Online Test MCQs With Answers
Question # 1
Total number of valence electrons in CH4
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8
9
10
12
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Question # 2
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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Question # 3
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 # 4
Which of the following metal does not liberate hydrogen on reaction with acid?
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Mg
Pt
Zn
Ca
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Question # 5
Zinc reacts with dilute acids to liberate hydrogen. This is because:
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Zn2+ ion is a powertul osidising agent than H' ion
H+ ion is a powerful oxidising agent than Zn ion
Zn2+ ion is a powerful reducing agent than H' ion
H+' ion is a powerful reducing agent than Zn- ian
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Question # 6
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 # 7
The value of oxidation number of chlorine in HCIOs is
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+7
+5
-1
+3
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Question # 8
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 # 9
In an electrochemical series, elements are arranged on the basis of
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pH scale
pKa scale
pOH scale
Hydrogen scale
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Question # 10
Electrolytic products of dilute aqueous solution of sodium sulphate is
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Na. SO2
H2. S02
Na. O2
H2,O2
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Question # 11
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 # 12
The standard reduction potential of Zinc is
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0.76V
0.34
-0.34V
-0.76V
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Question # 13
Most reactive among the following
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Li
Mg
Ca
Na
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Question # 14
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 # 15
The oxidation state of carbon in C2O-²4 is
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+4
-4
+3
+2
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Question # 16
The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute
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Oxidation
reduction
Redox reaction
electrolysis
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Question # 17
Which of following is oxidation state of oxygen in peroxides?
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-2
1/2
-1
+2
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Question # 18
If a strip of Cu metal is placed in a solution of FeSO4
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Cu will be deposited
Cu and Fe both dissolve
Fe is precipitated out
No reaction take place
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