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Classification of Elements and Periodicity in Properties

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Q426 Allen PERIOD, GROUP AND BLOCK MCQ
Which of the following statement is wrong for the transition elements:-
A.
Transition elements are placed from $3^{\mathrm{rd}}$ to $6^{\mathrm{th}}$ period.
B.
Last electron enters in (n-1)d orbital
C.
All are solids
D.
General electronic configuration is $(\mathbf{n - 1})\mathbf{d}^{1 - 10}\mathbf{ns}^{1 - 2}$
Q427 Allen PERIOD, GROUP AND BLOCK MCQ
Element with the electronic configuration given below, belong to which group in the periodic table $1s^{2}$ , $2s^{2}2p^{6}$ , $3s^{2}3p^{6}3d^{10}$ , $4s^{2}4p^{6}4d^{10}$ , $5s^{2}5p^{3}$
A.
$3^{rd}$
B.
$5^{th}$
C.
$15^{th}$
D.
$17^{th}$
Q428 Allen PERIOD, GROUP AND BLOCK MCQ
Which of the following electronic configuration belongs to inert gas elements:-
A.
$ns^{2}(n-1)d^{10}$
B.
$ns^{2}(n-1)s^{2}p^{6}$
C.
$ns^{2}np^{6}$
D.
None
Q429 Allen PERIOD, GROUP AND BLOCK MCQ
From atomic number 58 to 71, elements are placed in;-
A.
$5^{\text{th}}$ period and III A group
B.
$6^{\text{th}}$ period and III B group
C.
separate period and group
D.
$7^{\text{th}}$ period and IV B group
Q430 Allen PERIOD, GROUP AND BLOCK MCQ
True statement is :-
A.
All the transuranic elements are synthetic elements
B.
Elements of third group are called bridge elements
C.
Element of $1s^{2}$ configuration is placed in IIA group
D.
Electronic configuration of elements of a period is same
Q431 Allen PERIOD, GROUP AND BLOCK MCQ
An element recently discovered is Uub. Expected electronic configuration of the element is:-
A.
[Kr] $5s^{2}4d^{10}$
B.
[Xe] $6s^{2}4f^{14}5d^{8}$
C.
[Rn] $7s^{2}5f^{14}6d^{10}$
D.
[Rn] $7s^{2}5f^{10}d^{0}$
Q432 Allen PERIOD, GROUP AND BLOCK MCQ
Elements having $ns^{2}$ $np^{6}$ valence shell electronic configuration lies in :-
A.
Zero group and $1^{st}-7^{th}$ period
B.
$18^{th}$ group and $2^{nd}-7^{th}$ period
C.
$18^{th}$ group and $1^{st}-6^{th}$ period
D.
All are correct
Q433 Allen PERIOD, GROUP AND BLOCK MCQ
Certain regular intervals after which the outer electronic configuration of the elements occur are called :-
A.
Mass number
B.
Atomic numbers
C.
Magic numbers
D.
Avogadro number
Q434 Allen PERIOD, GROUP AND BLOCK MCQ
The electronic configuration of elements X and Z are $1s^{2}$ $2s^{2}$ $2p^{6}$ $3s^{2}$ $3p^{5}$ and $1s^{2}$ $2s^{2}$ $2p^{5}$ respectively. What is the position of element X with respect to position of Z in the periodic table -
A.
Just below Z
B.
Just above Z
C.
Left to the Z
D.
Right to the Z
Q435 Allen PERIOD, GROUP AND BLOCK MCQ
Which of the following sequence contains atomic number of only representative elements
A.
55, 12, 24, 53
B.
13, 33, 59, 83
C.
3, 33, 53, 87
D.
22, 33, 55, 66
Q436 Allen PERIOD, GROUP AND BLOCK MCQ
Uranium (At No. - 92) is the last natural element in the periodic table. If the last element of the periodic table which is recently discovered is Uub. What will be the total number of transuranic elements in the periodic table :-
A.
21
B.
20
C.
11
D.
12
Q437 Allen PERIOD, GROUP AND BLOCK MCQ
Which of the following statement is not correct for given electronic configuration $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{6} 4d^{10} 4f^{14} 5s^{2} 5p^{6} 5d^{10} 6s^{2}$
A.
It belongs to IIB group and $6^{\text{th}}$ period
B.
It is liquid at room temperature
C.
It is a transition element
D.
It is used in thermometres
Q438 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which statement is false:-
A.
Screening effect increases down the group
B.
$Z_{eff}$ decreases down the group
C.
$Z_{eff}$ increases in a period
D.
All
Q439 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Effective nuclear charge in hydrogen is :-
A.
more than nuclear charge
B.
less than nuclear charge
C.
equal to nuclear charge
D.
can't predict
Q440 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
In sodium atom, the screening is due to:
A.
$3s^{2}$ , $3p^{6}$
B.
$2s^{1}$
C.
$1s^{2}$ , $2s^{2}$ $2p^{6}$
D.
$1s^{2}$ , $2s^{2}$
Q441 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
The screening effect of d- electrons is :-
A.
Equal to the p - electrons
B.
Much more than p - electrons
C.
Same as f - electrons
D.
Less than p - electrons
Q442 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
The correct order of size would be:-
A.
Ni < Pd ā‰… Pt
B.
Pd < Pt < Ni
C.
Pt > Ni > Pd
D.
Pd > Pt > Ni
Q443 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which of the following order of radii is correct
A.
Li < Be < Mg
B.
$H^{+} < Li^{+} < H^{-}$
C.
O < F < Ne
D.
$Na^{+} > F^{-} > O^{-2}$
Q444 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
K+, Ar, Ca $^{2+}$ and S $^{2-}$ contains-
A.
Same electronic configuration and atomic volume
B.
Different electronic configuration but same IP.
C.
Same electronic configuration but different atomic volume
D.
None
Q445 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which of the following is not different for an atom and its corresponding ion :-
A.
Number of electrons
B.
Nuclear charge
C.
Size
D.
None of these
Q446 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which of the following is not isoelectronic series :-
A.
Cl $^{-}$ , P $^{3-}$ , Ar
B.
N $^{3-}$ , Ne, Mg $^{+2}$
C.
B $^{+3}$ , He, Li $^{+}$
D.
N $^{3-}$ , S $^{2-}$ , Cl $^{-}$
Q447 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which group of atoms have nearly same atomic radius:-
A.
Na, K, Rb, Cs
B.
Li, Be, B, C
C.
Fe, Co, Ni
D.
F, Cl, Br, I
Q448 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which of the following has largest radius :-
A.
$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$
B.
$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{1}$
C.
$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{3}$
D.
$1s^{2}$ , $2s^{2}$ $2p^{6}$ , $3s^{2}$ $3p^{5}$
Q449 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
Which of the following order of atomic/ionic radius is not correct :-
A.
$\mathrm{I}^{-} > \mathrm{I} > \mathrm{I}^{+}$
B.
$\mathrm{Mg}^{+2} > \mathrm{Na}^{+} > \mathrm{F}^{-}$
C.
$\mathrm{P}^{+5} < \mathrm{P}^{+3}$
D.
$\mathrm{Li} > \mathrm{Be} > \mathrm{B}$
Q450 Allen Zeff, SCREENING CONSTANT & ATOMIC RADIUS MCQ
In the lithium atom, screening effect of valence shell electron is caused by-
A.
Electrons of K and L shell
B.
Electrons of K shell
C.
Two electrons of $1^{st}$ and one of $2^{nd}$ shell
D.
None