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Classification of Elements and Periodicity in Properties

301 Questions Start Errorless Test
All Exams Errorless
CPMT 1985; UPSEAT 2001; BHU 2003 Q276 Errorless Extended or Long Form of Periodic Table MCQ
Which of the following pairs has both members from the same period of the periodic table
A.
$Na - Ca$
B.
$Na - Cl$
C.
$Ca - Cl$
D.
$Cl - Br$
CPMT 1985; AIEEE 2011 Q277 Errorless Valency and Oxidation State MCQ
Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides
A.
$Al_{2}O_{3} < MgO < Na_{2}O < K_{2}O$
B.
$MgO < K_{2}O < Al_{2}O_{3} < Na_{2}O$
C.
$Na_{2}O < K_{2}O < MgO < Al_{2}O_{3}$
D.
$K_{2}O < Na_{2}O < Al_{2}O_{3} < MgO$
DPMT 1984; UPSEAT 2001 Q278 Errorless Extended or Long Form of Periodic Table MCQ
Diagonal relationship is shown by
A.
Elements of first period
B.
Elements of second period
C.
Elements of third period
D.
Both b and c
CPMT 1983 Q279 Errorless Valency and Oxidation State MCQ
Out of the following elements which one do you expect to be most reactive chemically
A.
Mg
B.
Ca
C.
Sr
D.
Ba
AIIMS 1982 Q280 Errorless Extended or Long Form of Periodic Table MCQ
Elements after atomic number 103 have not been discovered till now. If an element with atomic number 106 were ever discovered which of the following electronic configuration will it possess
A.
$[Rn]5f^{14}6d^{4}7s^{2}$
B.
$[Rn]5f^{14}6d^{5}7s^{1}$
C.
$[Rn]5f^{14}6d^{6}7s^{0}$
D.
$[Rn]5f^{14}6d^{1}7s^{2}7p^{3}$
CPMT 1982, 99; Bihar CEE 2006 Q281 Errorless Electronegativity MCQ
Most electronegative element is
A.
Al
B.
C
C.
Si
D.
Be
AIIMS 1982 Q282 Errorless Valency and Oxidation State MCQ
Thalium shows different oxidation states because
A.
It is a transition element
B.
Of inert pair effect
C.
Of its amphoteric character
D.
Of its higher reactivity
IIT 1982 Q283 Errorless Critical Thinking MCQ
The element with the highest first ionization potential is
A.
Boron
B.
Carbon
C.
Nitrogen
D.
Oxygen
DPMT 1981, 82; CPMT 1984, 89; RPMT 1997; UPSEAT 2001; MP PET 2001, 13; MP PMT 2006 Q284 Errorless Valency and Oxidation State MCQ
Variable valency is a general feature of
A.
s ā€” block elements
B.
p ā€” block elements
C.
d ā€” block elements
D.
Al of these
IIT 1981 Q285 Errorless Critical Thinking MCQ
The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is
A.
C > N > O > F
B.
O > N > F > C
C.
O > F > N > C
D.
F > O > N > C
CPMT 1979, 93; MP PMT 2011 Q286 Errorless Extended or Long Form of Periodic Table MCQ
The element X, Y, Z and T have the indicated electronic configurations. Starting with the innermost shell, which is the most metallic element
A.
X = 2,8,4
B.
Y = 2,8,8
C.
Z = 2,8,8,1
D.
T = 2,8,8,7
EAMCET 1979 Q287 Errorless Extended or Long Form of Periodic Table MCQ
Which one of the following combination represents a metallic element
A.
2, 8, 7
B.
2, 8, 8
C.
2, 8, 4
D.
2, 8, 2
CPMT 1976; Kurukshetra CEE 1998 Q288 Errorless Extended or Long Form of Periodic Table MCQ
The heaviest atom amongst the following is
A.
U
B.
Ra
C.
Pb
D.
Hg
CPMT 1976 Q289 Errorless Extended or Long Form of Periodic Table MCQ
The most important active step in the development of periodic table was taken by
A.
Mendeleev
B.
Dalton
C.
Avogadro
D.
Cavendish
CPMT 1972 Q290 Errorless Extended or Long Form of Periodic Table MCQ
Who is called the father of chemistry
A.
Faraday
B.
Priestley
C.
Rutherford
D.
Lavoiser
Q291 Errorless Extended or Long Form of Periodic Table MCQ
The lightest metal is
A.
Li
B.
Mg
C.
Ca
D.
Na
Q292 Errorless Extended or Long Form of Periodic Table MCQ
All the s-block elements of the periodic table are placed in the groups ...
A.
IA and IIA
B.
IIIA and IVA
C.
B sub groups
D.
VA to VIIA
Q293 Errorless Ionisation Energy MCQ
Generally, the first ionisation energy increases along a period. But there are some exceptions. One which is NOT an exception is .....
A.
N and O
B.
Na and Mg
C.
Mg and Al
D.
Be and B
Q294 Errorless Electron Affinity MCQ
Match the entries Columned in Column-I with appropriate properties Columned in Column-II
Column-IColumn-II
(P)He
(Q)Cl
(R)Ca
(S)Li
(I)High electron affinity
(II)Most electropositive element
(III)Strongest reducing agent
(IV)Highest ionization energy
A.
Pā€“iii, Qā€“i, Rā€“ii, Sā€“iv
B.
Pā€“iv, Qā€“iii, Rā€“ii, Sā€“i
C.
Pā€“ii, Qā€“iv, Rā€“i, Sā€“iii
D.
Pā€“i, Qā€“ii, Rā€“iii, Sā€“iv
E.
Pā€“iv, Qā€“i, Rā€“ii, Sā€“iii
Q295 Errorless Critical Thinking MCQ
Which element has the greatest tendency to loose electrons
A.
F
B.
S
C.
Fe
D.
Be
Q296 Errorless Critical Thinking MCQ
Read the following statement and explanation and answer as per the options given below; Assertion : The first ionization energy of Be is greater than that of B
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
Q297 Errorless Critical Thinking MCQ
Identify the correct order of acidic strengths of $CO_{2}$ , CuO, CaO, $H_{2}O$
A.
CaO < CuO < $H_{2}O$ < $CO_{2}$
B.
$H_{2}O$ < CuO < CaO < $CO_{2}$
C.
CaO < $H_{2}O$ < CuO < $CO_{2}$
D.
$H_{2}O$ < $CO_{2}$ < CaO < CuO
Q298 Errorless Latest Trend MCQ
Consider the elements Mg. Al, S, p and Si, the correct increasing order of their first ionization enthalpy is
A.
$$ M g < A l < S i < S < P $$
B.
$$ A l < M g < S i < S < P $$
C.
$$ M g < A l < S i < P < S $$
D.
$$ A l < M g < S < S i < P $$
Q299 Errorless Latest Trend MCQ
Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R) : It is due to increase in ionization enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements,
choose the most appropriate answer from the options given below :
(a) Both (A) and (R) are correct and (R) is the correct explanation of (A)
(d) Both (A) and (R) are correct and (R) is not the correct explanation of (A)
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
Q300 Errorless Latest Trend Numerical
Arrange the bonds in order of increasing ionic character in the molecules. LiF, $K_{2}O$ , $N_{2}$ , $SO_{2}$ and $ClF_{3}$ [a) $ClF_{3} < N_{2} < SO_{2} < K_{2}O < LiF$ (b) $LiF < K_{2}O < ClF_{3} < SO_{2} < N_{2}$ (c) $N_{2} < SO_{2} < ClF_{3} < K_{2}O < LiF$ (d) $N_{2} < ClF_{3} < SO_{2} < K_{2}O < LiF$