Home/Class 11/Chemistry/

Question and Answer

The four quantum numbers of the valence electronof potassium are:
(A) \(4,0,1,+\frac{1}{2}\)
(B) \(4,1,0,+\frac{1}{2}\)
(C) \(4,0,0,+\frac{1}{2}\)
(D) \(4,1,1,+\frac{1}{2}\)
loading
settings
Speed
00:00
06:29
fullscreen
The four quantum numbers of the valence electronof potassium are:
(A) \(4,0,1,+\frac{1}{2}\)
(B) \(4,1,0,+\frac{1}{2}\)
(C) \(4,0,0,+\frac{1}{2}\)
(D) \(4,1,1,+\frac{1}{2}\)

Answer

Answer: C
For Potassium, configuration is \(1s^22s^2p^63s^23p^64s^1\). The outermost electron is thus in 4s orbital unpaired.

The four quantum no. for the valence electron of potassium is

n=4, l=0, m=0 and s= +1/2

Hence, the correct option is C
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
Correct37
Incorrect0
Watch More Related Solutions
\(50\) ml of a certain sample of \(H_{2}O_{2}\) gives \(1200\) ml of \(O_{2}\) at STP. The volume strength of \(H_{2}O_{2}\) is:

(A) 22.4 V
(B) 20 V
(C) 24 V
(D) 11.2 V
The precipitate of \(CaF_{2}(K_{sp} =1.7\times 10^{-10})\) is obtained when equal volumes of the following are mixed
(A) \(10^{-4}M Ca^{2+}+10^{-4}M F^{-}\)
(B) \(10^{-2}M Ca^{2+}+10^{-3}M F^{-}\)
(C) Both A and B
(D) None of these
Density of heavy water is maximum at:

(A) \(3.82^{o}C\)
(B) \(101.42^{o}C\)
(C) \(11.6^{o}C\)
(D) \(4^{o}C\)
The number of protons, electrons and neutrons respectively in a molecule of heavy water is:

(A) \(10, 10, 10\)
(B) \(8, 10, 11\)
(C) \(10, 11, 10\)
(D) \(11, 10, 10\)
Silver ore + \(CN^-+H_2O \xrightarrow [ ]{O_2 } \) \([P]+OH^-\)
\(\downarrow Zn\)
\([Q]+Ag\)
In the process of extraction of silver, identify the complexes [P] and [Q].
(A) \(P=[Ag(CN)_4]^-, Q =[Zn(CN)_4]^{2-}\)
(B) \(P=[Ag(CN)_4]^-, Q =[Zn(CN)_6]^{4-}\)
(C) \(P=[Ag(CN)_4]^{3-}, Q =[Zn(CN)_4]^{2-}\)
(D) \(P=[Ag(CN)_2]^-, Q =[Zn(CN)_4]^{2-}\)
The line spectrum is a characteristic of:

(A) atoms
(B) molecules
(C) any substance in the solid state
(D) any substance in the liquid state
The fringe width of interference fringes for redcolour is \(\beta \). The fringe width for violet colourwill be nearly :
\((\lambda_{Red} = 620-740 nm, \lambda _{Violet} = 380-450 nm)\)

(A) \(\beta \)
(B) 2\(\beta \)
(C) \(\dfrac{\beta }{4}\)
(D) \(\dfrac{\beta }{2}\)
Which of the following is considered production in economics?
(A) Painting a picture for pleasure
(B) Preventing a child from falling into a man-hole on the road
(C) Singing a song before friends
(D) Tilling of soil
Agreement to share profits in a partnership firm ___________.
(A) must be coupled with an agreement to share losses
(B) is same as agreement to share losses
(C) implies an agreement to share losses
(D) does not necessarily mean an agreement to share losses
Evaluate \({\left( {{{17}^2} - {8^2}} \right)^{\frac{1}{2}}}\)
(A) 15

Load More