JEE Mains Chemistry Solutions. We covered all the JEE Mains Chemistry Solutions in this post for free so that you can practice well for the exam.
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JEE Mains Chemistry Solutions for Students
The stable oxidation state of actinides is :
(A) +4
(B) +3
(C) +5
(D) +6
Option b – +3
The symbol of the element californium is :
(A) Cm
(B) Cr
(C) Cf
(D) Cn
Option c – Cf
The most characteristic oxidation state of lanthanides is :
(A) +2
(B) +3
(C) +4
(D) none of these
Option b – +3
Name the three lanthanides which show a +2 oxidation state also :
(A) Sm, Tb, Gd
(B) Sm, Eu, Yb
(C) La, Gd, Lu
(D) Yb, Pm, Sm
Option b – Sm, Eu, Yb
The elements from cerium (At. No. 58) to lutetium (At. No. 71) in which 4f energy levels are filled up are called :
(A) lanthanides
(B) rare earth
(C) lanthanones
(D) all the above
Option d – all the above
The actinides showing a +7 oxidation state are :
(A) U, Np
(B) Pu, Am
(C) Np, Pu
(D) None of these
Option c – Np, Pu
The maximum oxidation state shown by actinides is :
(A) +6
(B) +7
(C) +5
(D) +4
Option b – +7
Which of the following is a lanthanide :
(A) Ta
(B) Rh
(C) Th
(D) Gd
Option d – Gd
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