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Classification of Elements and Periodicity in Properties

571 Questions Start Errorless Test
All Exams Errorless Allen
Bihar CEE 1992 Q326 Errorless Valency and oxidation state MCQ
Which of the following electronic configurations in the outermost shell is characteristic of alkali metals
A.
$(n - 1)s^{2}p^{6},ns^{2}p^{1}$
B.
$(n - 1)s^{2}p^{6}d^{10},ns^{1}$
C.
$(n - 1)s^{2}p^{6},ns^{1}$
D.
$ns^2 p^6 d^1$
CBSE PMT 1992; AFMC 1998; CPMT 1999; DCE 2006 Q327 Errorless Critical Thinking MCQ
A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration
A.
$1s^{2}, 2s^{2}2p^{6}, 3s^{1}$
B.
$1s^{2}, 2s^{2}2p^{6}, 3s^{2}3p^{1}$
C.
$1s^{2}, 2s^{2}2p^{6}, 3s^{2}3p^{2}$
D.
$1s^{2}, 2s^{2}2p^{6}, 3s^{2}$
CPMT 1991; Kurukshetra CEE 1991; MP PET 2001 Q328 Errorless Extended or long form of periodic table MCQ
An element of atomic number 29 belongs to
A.
s-block
B.
p-block
C.
d-block
D.
f-block
Kurukshetra CEE 1991 Q329 Errorless Extended or long form of periodic table MCQ
Which one of the following belongs to representative group of elements in the periodic table
A.
Lanthanum
B.
Argon
C.
Chromium
D.
Aluminium
Kurukshetra CEE 1991; KCET 2008 Q330 Errorless Extended or long form of periodic table MCQ
An element with atomic number 21 is a
A.
Transition element
B.
Alkali metal
C.
Halogen
D.
Representative element
AIIMS 1991 Q331 Errorless Ionisation Energy MCQ
Which has the highest second ionisation potential
A.
Nitrogen
B.
Carbon
C.
Oxygen
D.
Fluorine
Kurukshetra CEE 1991 Q332 Errorless Ionisation Energy MCQ
With reference to concept of ionisation potential, which one of the following sets are correct
A.
$U > K > Cs$
B.
$B > U > K$
C.
$Cs > U > B$
D.
$Cs < U < K$
KCET 1991; CBSE PMT 1991; Pb. PET 1999; BHU 2000 Q333 Errorless Critical Thinking MCQ
Which element having following electronic configurations has minimum ionisation potential
A.
$1s^{1}$
B.
$1s^{2}, 2s^{2} 2p^{6}$
C.
$1s^{2}, 2s^{2} 2p^{6}, 3s^{1}$
D.
$1s^{2}, 2s^{2} 2p^{2}$
AFMC 1990 Q334 Errorless Extended or long form of periodic table MCQ
The telluric helix was given by
A.
De Chan Courtois
B.
Newlands
C.
L. Meyer
D.
Mendeleev
BIT 1990; UPSEAT 2001; MP PMT 2001; AFMC 2012 Q335 Errorless Extended or long form of periodic table MCQ
Which of these does not reflect the periodicity of the elements
A.
Bonding behaviour
B.
Electronegativity
C.
Ionisation energy
D.
Neutron/proton ratio
EAMCET 1990; MP PET 1995, 96; Pb. CET 2001; RPMT 2002 Q336 Errorless Extended or long form of periodic table MCQ
Chemical property of Li and Mg are similar because
A.
These belong to same group
B.
Both ionisation potential is same
C.
Shows diagonal relationship
D.
Both electron affinity is same
DPMT 1990; DCE 2000 Q337 Errorless Valency and oxidation state MCQ
The correct order of increasing order of oxidising power is
A.
$F_{2} < Cl_{2} < Br_{2} < I_{2}$
B.
$F_{2} < Br_{2} < Cl_{2} < I_{2}$
C.
$Cl_{2} < Br_{2} < F_{2} < I_{2}$
D.
$I_{2} < Br_{2} < Cl_{2} < F_{2}$
Roorkee (IIT) 1990 Q338 Errorless Critical Thinking MCQ
Arrange $S, O$ and $Se$ in ascending order of electron affinity
A.
$O < Se < S$
B.
$Se < O < S$
C.
$S < O < Se$
D.
$S < Se < O$
IIT 1990 Q339 Errorless Critical Thinking MCQ
Amongst the following elements (whose electronic configurations are given below), the one having the highest ionization energy is
A.
$[Ne]3s^{2}3p^{1}$
B.
$[Ne]3s^{2}3p^{3}$
C.
$[Ne]3s^{2}3p^{2}$
D.
$[Ne]3d^{10}4s^{2}4p^{3}$
Roorkee (IIT) 1990 Q340 Errorless Critical Thinking MCQ
The process requiring the absorption of energy is
A.
$F \rightarrow F^{-}$
B.
$Cl \rightarrow Cl^{-}$
C.
$O \rightarrow O^{2-}$
D.
$H \rightarrow H^{-}$
IIT JEE 1990; JEE (Main) 2021 Q341 Errorless Latest Trend MCQ
Consider the elements $Mg$ , $Al$ , $S$ , $P$ and $Si$ , the correct increasing order of their first ionization enthalpy is
A.
$Mg < Al < Si < S < P$
B.
$Al < Mg < Si < S < P$
C.
$Mg < Al < Si < P < S$
D.
$Al < Mg < S < Si < P$
CBSE PMT 1989 Q342 Errorless Extended or long form of periodic table MCQ
Modern periodic table is based on the atomic number of the elements. The experiment which proved the significance of the atomic number was
A.
Mullikan's oil drop experiment
B.
Moseley's work on $X$ -ray spectra
C.
Bragg's work on $X$ -ray diffraction
D.
Discovery of $X$ -rays by Rontgen
CPMT 1989 Q343 Errorless Atomic and Ionic radii MCQ
In a period, elements are arranged in strict sequence of
A.
Decreasing charges in the nucleus
B.
Increasing charges in the nucleus
C.
Constant charges in the nucleus
D.
Equal charges in the nucleus
Pb. CET 1989 Q344 Errorless Atomic and Ionic radii MCQ
In the isoelectronic species the ionic radii (ƅ) of $N^{3-}$ , $O^{2-}$ and $F^{-}$ are respectively given by
A.
1.36, 1.40, 1.71
B.
1.36, 1.71, 1.40
C.
1.71, 1.40, 1.36
D.
1.71, 1.36, 1.40
EAMCET 1989 Q345 Errorless Atomic and Ionic radii MCQ
Which one of the following indicates the correct order of atomic size
A.
$Be > F > C > Ne$
B.
$Be < C < F < Ne$
C.
$Be > C > F > Ne$
D.
$F < Ne < Be < C$
CPMT 1989; MP PET 2001 Q346 Errorless Ionisation Energy MCQ
Ionisation potential is lowest for
A.
Halogens
B.
Inert gases
C.
Alkaline earth metals
D.
Alkali metals
CPMT 1989 Q347 Errorless Electronegativity MCQ
Electronegativity is a measure of the capacity of an atom to
A.
Attract electrons
B.
Attract protons
C.
Repel electrons
D.
Repel protons
IIT 1989 Q348 Errorless Critical Thinking MCQ
Which of the following is paramagnetic
A.
$O_2^-$
B.
$CN^{-}$
C.
$CO$
D.
$NO^{+}$
IIT 1989 Q349 Errorless Critical Thinking MCQ
Which one of the following is strongest base
A.
$AsH_{3}$
B.
$NH_{3}$
C.
$PH_{3}$
D.
$SbH_{3}$
IIT 1989 Q350 Errorless Critical Thinking MCQ
Which one of the following is the smallest in size
A.
$N^{3-}$
B.
$O^{2-}$
C.
$F^{-}$
D.
$Na^{+}$