Question No:1

The maximum number of elements available in elemental form

[A] 26

[B] 92

[C] 111

[D] 118

Question No:2

Number of short periods in short form of periodic table

[A] 3

[B] 2

[C] 4

[D] 6

Question No:3

Considering the chemical properties, atomic weight of the element ‘Be’ was corrected based on

[A] Valency

[B] Configuration

[C] Density

[D] Atomic volume

Question No:4

The longest and shortest periods are

[A] 1 & 6

[B] 2 & 6

[C] 6 & 1

[D] 1 & 7

Question No:5

The number of elements present in 2nd, 3rd, 4th and 5th periods of modern periodic table respectively are

[A] 2, 8,8 & 18

[B] 8, 8,18 & 32

[C] 8, 8, 18 & 18

[D] 8, 18, 18 & 32

Question No:6

Which of the following pair of elements are from the same group of the periodic table

[A] Mg, Cs

[B] Mg, Sr

[C] Mg, Cl

[D] Na, Cl

Question No:7

Elements of a vertical group have

[A] Same atomic number

[B] Same electronic configuration

[C] Same number of valency electrons

[D] Same number of core electrons

Question No:8

The general electronic configuration of elements of carbon family

[A] ns² np⁴

[B] ns² np³

[C] ns² np¹

[D] ns² np²

Question No:9

Outer shell ‘octet’ configuration is observed for the elements of the group

[A] 2

[B] 8

[C] 18

[D] 32

Question No:10

The starting element of fifth period is

[A] K

[B] Rb

[C] Kr

[D] Xe

Question No:11

Element with atomic number 15 and mass number 31 is present in

[A] group 5 and period 4

[B] group 5 and period 3

[C] group 15 and period 3

[D] group 15 and period 4

Question No:12

In the periodic table, the elements are arranged in the periods following the

[A] Hund’s rule of maximum multiplicity

[B] Pauli’s exclusion principle

[C] Aufbau principle

[D] Both (1) and (2)

Question No:13

Which of the following pairs of atomic numbers represents elements belonging to the same group?

[A] 11,20

[B] 12,30

[C] 13,31

[D] 14,33

Question No:14

As per the modern periodic law, the physical and chemical properties of elements are periodic function: of their

[A] atomic number

[B] electronic configuration

[C] atomic weight

[D] atomic size

Question No:15

An element with atomic number 20 will be placed in which period of the periodic table?

[A] 4

[B] 3

[C] 2

[D] 1

Question No:16

If the atomic number of an element is 33, it will be placed in the periodic table in the

[A] First group

[B] Third group

[C] Fifth group

[D] Seventh group

Question No:17

The number of periods present in the long form of the periodic table

[A] 6

[B] 7

[C] 8

[D] 18

Question No:18

The electronic configuration of group III elements is

[A] ns² np³

[B] ns²np⁵

[C] ns²np¹

[D] ns²np²

Question No:19

The total number of gaseous elements are

[A] 8

[B] 9

[C] 10

[D] 11

Question No:20

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