Chemistry Class 12 Question Bank Solution. We covered all the Chemistry Class 12 Question Bank Solution in this post for free so that you can practice well for the exam.
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Chemistry Class 12 Objective Question Bank Solution for Students
The oxygen-carrying pigment, oxyhaemocyarin, containing two copper ions is diamagnetic, because :
(A) the two copper ions are in a +1 oxidation state
(B) one of the copper ions is in a +1 oxidation state and the other is in a +2 oxidation state
(C) there are strong anti-ferromagnetic interactions between the two copper ions
(D) there are ferromagnetic interactions between the two copper ions
Option a – the two copper ions are in a +1 oxidation state
Which of the following oxides will not give metal on heating :
(A) HgO
(B) ZnO
(C) Ag2O
(D) all
Option b – ZnO
The common oxidation state of the elements of the lanthanide series is
(A) + 2
(B) + 3
(C) + 4
(D) + 1
Option b – + 3
In a neutral medium, the equivalent mass of KMnO4 is……… its molecular mass
(A) 1/3rd
(B) 1/6th
(C) 1/2
(D) None of these
Option a – 1/3rd
KMnO4 is ……… soluble in water
(A) Highly
(B) Insoluble
(C) Partially
(D) None of these
Option c – Partially
Platinum metals are
(A) Ru and Os
(B) Rh and Ir
(C) Pd and Pt
(D) All of these
Option d – All of these
An example of an ionic compound is
(A) CuCl2
(B) CuF2
(C) CuBr2
(D) All of these
Option b – CuF2
When MnO2 is fused with KOH, a colored compound is formed, and the product and its color is
(A) K₂MnO4, green
(B) KMnO4, purple
(C) Mn203, brown
(D) Mn304, black
Option a – K₂MnO4, green
When (i) NH4VO3 is heated. ii) (NH4)2 Cr2O7 is heated :
(A) in both cases, N₂ is formed
(B) in both cases, NH3 is formed
(C) in (i) NH3 and in (ii) N₂ are formed
(D) in (i) N₂ and in (ii) NH3 are formed
Option c – in (i) NH3 and in (ii) N₂ are formed
Pyrolusite is chemically
(A) MnO
(B) Mn2O3
(C) MnO2
(D) None of these
Option c – MnO2
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