Colour of Actinides
Trending Questions
Q. which of the following lanthanoids shows yellow colour yb+3 or ce+4
Q. Colour of actinides depends on number of electrons present in
- 6f
- 5f
- 4f
- 3f
Q. Following are the transition metal ions of 3d series:
Ti4+, V2+, Mn3+, Cr3+
(Atomic numbers: Ti=22, V=23, Mn=25, Cr=24)
Ti4+, V2+, Mn3+, Cr3+
(Atomic numbers: Ti=22, V=23, Mn=25, Cr=24)
Answer the following:
(i) Which ion is most stable in an aqueous solution and why?
(ii) Which ion is a strong oxidising agent and why?
(iii) Which ion is colourless and why?
(ii) Which ion is a strong oxidising agent and why?
(iii) Which ion is colourless and why?
Q. If a lanthanide element with xf electrons has a pink colour, then the lanthanide with (14−x)f electrons will have _____ colour.
- red
- blue
- green
- pink
Q. Match the following:
List - IList - II(A) n=6→n=3(In H- atoms)(p)10 lines in the spectrum(B) n=7→n=3(In H atoms)(q) Spectral lines in visible region(C) n=5→n=2(In H-atoms)(r) 6 lines in the spectrum(D) n=5→n=1(In H-atoms) (s) Spectral lines in infrared region (t) Spectral lines in U.V. region
List - IList - II(A) n=6→n=3(In H- atoms)(p)10 lines in the spectrum(B) n=7→n=3(In H atoms)(q) Spectral lines in visible region(C) n=5→n=2(In H-atoms)(r) 6 lines in the spectrum(D) n=5→n=1(In H-atoms) (s) Spectral lines in infrared region (t) Spectral lines in U.V. region
- (A→r, s) (B→p, s); (C→q, r, s); (D→p, q, s, t)
- (A→r) (B→p, s); (C→q, r, s); (D→p, q, s, t)
- (A→r, s) (B→p, s); (C→q, r); (D→p, q, s, t)
- (A→r, s) (B→p, s); (C→q, r, s); (D→p, q, s)
Q. Which of the following molecular species/compound is not hypovalent?
- CH+3
- B2H6
- NH+2
- AlF3
Q.
Inner transition elements exhibit different coloured compounds on account of unfilled _______ orbitals.
- s
- f
- d
- p
Q.
The elements which occupy the peaks of ionization energy curve are
Cl, Br, I, F
He, Ne, Ar, Kr
Na, K, Rb, Cs
Na, Mg, Cl, I
Q.
Define the electrochemical series.
