Chemistry Weightage Class 12 HSC. We covered all the Chemistry Weightage Class 12 HSC in this post for free so that you can practice well for the exam.
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Chemistry Weightage Class 12 HSC Objective for Students
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at 1 atm pressure. The oxidation potential of the electrode would be.
(A) 0.059 V
(B) 0.59 V
(C) 0.118 V
(D) 1.18 V
Option c – 0.118 V
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
(A) Zinc is lighter than iron
(B) Zinc has a lower melting point than iron
(C) Zinc has a lower negative electrode potential than iron
(D) Zinc has a higher negative electrode potential than iron
Option d – Zinc has a higher negative electrode potential than iron
A device that converts the energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as
(A) Fuel cell
(B) Electrolytic cell
(C) Dynamo
(D) Ni-Cd cell
Option c – Dynamo
An aqueous solution of which of the following compounds is the best conductor of electric current?
(A) Acetic acid, C₂H4O2
(B) Hydrochloric acid, HCl
(C) Ammonia, NH3
(D) Fructose, C5H12O6
Option b – Hydrochloric acid, HCl
The standard electrode potential of three metals X, Y, and Z are -12 V, + 0.5 V, and -3.0 V respectively. The reducing power of these metals will be
(A) Y> X> Z
(B) Z> X > Y
(C) X > Y > Z
(D) Y>Z> X
Option b – Z> X > Y
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of (pH = 10) and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of the electrode would be
(A) 0.59 volt
(B) 0.118 volt
(C) 1.18 volt
(D) 0.059 volt
Option a – 0.59 volt
We covered all the chemistry weightage class 12 hsc above in this post for free so that you can practice well for the exam.
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