Vatsal Chemistry Class 12. We covered all the Vatsal Chemistry Class 12 in this post for free so that you can practice well for the exam.
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Vatsal Chemistry Class 12 Objective for Students
Four successive members of the first-row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?
(A) Vanadium (Z = 23)
(B) Chromium (Z = 24)
(C) Manganese (Z = 25)
(D) Iron (Z = 26)
Option c – Manganese (Z = 25)
More oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is
(A) the more active nature of the actinoids
(B) more energy difference between Sf and 6d orbitals than that between 4f and 5d orbitals
(C) the lesser energy difference between Sf and 6d orbitals than that between 4f and 5d orbitals
(D) greater metallic character of the lanthanoids than that of the corresponding actinoids
Option b – more energy difference between Sf and 6d orbitals than that between 4f and 5d orbitals
For the four successive transition elements (Cr, Mn, Fe, and Co), the stability of the +2 oxidation state will be there in which of the following order? (At. nos. Cr= 24, Mn = 25, Fe = 26, Co=27)
(A) Mn > Fe> Cr> Co
(B) Fe > Mn > Co > Cr
(C) Co > Mn > Fe> Cr
(D) Cr > Mn > Co > Fe
Option b – Fe > Mn > Co > Cr
(A) Ce(+4) solutions are widely used as oxidizing agents in volumetric analysis
(B) Europium shows a +2 oxidation state
(C) The basicity decreases as the ionic radius decreases form Pr to Lu
(D) All the lanthanons are much more reactive than aluminum
Option a – Ce(+4) solutions are widely used as oxidizing agents in volumetric analysis
Name the gas that can readily decolorize acidified KMnO4 solution.
(A) SO2
(B) NO2
(C) P2O5
(D) CO2
Option a – SO2
Assuming complete ionization, the same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation?
(A) FeC₂04
(B) Fe(NO₂)₂
(C) FeSO4
(D) FeSO3
Option c – FeSO4
Which of the correct order of increasing energy of the listed orbitals in the atoms of titanium? (At.no.Z =22)
(A) 3s 3p 3d 4s
(B) 3s 3p 4s 3d
(C) 3s 4s 3p 3d
(D) 4s 3s 3p 3d
Option b – 3s 3p 4s 3d
When copper is heated with conc. HNO3 it produces?
(A) Cu(NO3)2 and N₂O
(B) Cu(NO3)2 and NO2
(C) Cu(NO3)2 and NO
(D) Cu(NO3)2, NO and N₂O
Option b – Cu(NO3)2 and NO2
Which one of the following statements is correct when SO₂ is passed through acidified K₂Cr₂O7 solution?
(A) Green Cr2(SO4)3 is formed
(B) The solution turns blue
(C) The solution is decolorized
(D) SO2 is reduced
Option a – Green Cr2(SO4)3 is formed
We covered all the vatsal chemistry class 12 above in this post for free so that you can practice well for the exam.
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