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Free download in PDF Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER and other competitive exams. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Which one will have the highest 2nd ionisation energy?
[A]
1s2 2s2 2p6 3s1
[B]
1s2 2s2 2p4
[C]
1s2 2s2 2p6
[D]
1s2 2s2 2p6 3s2
(2)
Which one is the most acidic among these?
[A]
MgO
[B]
CaO
[C]
Al2O3
[D]
Na2O
(3)
Two different beakers contain M1-O-H, and M2-O-H solutions separately. Find the nature of the two solutions if the electronegativity of M1 = 3.4, M2 = 1.2, O = 3.5, H = 2.1
[A]
acidic, acidic
[B]
basic, acidic
[C]
basic, basic
[D]
acidic, basic
(4)
The correct order of electronegativity is
[A]
Cl > F > O > Br
[B]
F > O > Cl > Br
[C]
F > Cl > Br > O
[D]
O > F > Cl > Br
(5)
Which of the following statements is incorrect?
[A]
I.E.1 of O is lower than that of N but I.E.2 O is higher than that of N
[B]
The enthalpy of N to gain an electron is almost zero but of P is 74.3 kJ mol-1
[C]
isoelectronic ions belong to the same period
[D]
The covalent radius of iodine is less than its Van der Waal’s radius
Answer: isoelectronic ions belong to the same period
(6)
Which of the reactions will need the maximum amount of energy?
[A]
Na → Na+ + e–
[B]
Ca+ → Ca++ + e–
[C]
K+ → K+ ++ e–
[D]
C2+ → C3+ + e–
(7)
For the same value of n, the penetration power of orbital follows the order
[A]
s = p = d = f
[B]
p > s > d > f
[C]
f < d < p < s
[D]
s < p < d < f
(8)
The correct order for the size of I, I+, I– is
[A]
I > I– > I+
[B]
I > I+ > I–
[C]
I– > I > I+
[D]
I+ > I– > I
(9)
In the modern periodic table, the number of period of the element is the same as
[A]
principal quantum number
[B]
atomic number
[C]
azimuthal quantum number
[D]
atomic mass
Answer: principal quantum number
(10)
Find the successive elements of the periodic table with ionisation energies, 2372, 520 and 890 kJ per mol respectively
[A]
Li, Be, B
[B]
H, He, Li
[C]
B, C, N
[D]
He, Li, Be
(11)
How Many Elements are there in the 5th Period?
[A]
18.
[B]
10.
[C]
32.
[D]
8.
(12)
Which One is a Metalloid?
[A]
Sb.
[B]
Zn.
[C]
Bi.
[D]
Pb.
(13)
How Many Rare Earth Elements are there?
[A]
14.
[B]
8.
[C]
10.
[D]
32.
(14)
Which all Elements do have ns2 np6 Outer Electronic Configuration?
[A]
Chalcogens.
[B]
Alkaline earth.
[C]
Noble gasses.
[D]
Transition elements.
(15)
Which Block Does Refer to all the Non-metal Elements?
[A]
P-block.
[B]
D-block.
[C]
F-block.
[D]
S-block.
(16)
Which One is the Lightest Among the Following Metals?
[A]
Ca.
[B]
Li.
[C]
Na.
[D]
Mg.
(17)
What Does Determine the Chemical Behaviour of Atoms?
[A]
Binding energy.
[B]
Isotope numbers.
[C]
Mass number.
[D]
Atomic number.
(18)
The Right Side of the Periodic Table Refers to
[A]
Non-metals.
[B]
Metalloids.
[C]
Metals.
[D]
Transition elements.
(19)
Which Atomic Number Refers to a Metal?
[A]
38
[B]
36
[C]
32
[D]
34
(20)
Which Elements do Display Diagonal Relationship?
[A]
Al and B.
[B]
C and B.
[C]
Ga and B.
[D]
Si and B.
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