Periodic Properties - Class 12 MCQ

# Periodic Properties - Class 12 MCQ

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## 30 Questions MCQ Test - Periodic Properties

Periodic Properties for Class 12 2024 is part of Class 12 preparation. The Periodic Properties questions and answers have been prepared according to the Class 12 exam syllabus.The Periodic Properties MCQs are made for Class 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Periodic Properties below.
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Periodic Properties - Question 1

### The ionic radii of N3-, O2- and F- are respectively given by:

Detailed Solution for Periodic Properties - Question 1

Size of isoelectronic ions decreases with increasing atomic number. Order can be decided by e/p ratio, Radii decreases with decrease in ratio

Periodic Properties - Question 2

### In which pair, the first atom or ion is not larger than the second?

Detailed Solution for Periodic Properties - Question 2

Atomic size decrease along the period and increases down the group. In case of ions, anions are bigger & cations are smaller, size decreases with increases in cationic charge

Periodic Properties - Question 3

### Which of the following is most stable?

Detailed Solution for Periodic Properties - Question 3

The tendency to show lower ionic state increases down the group due to inert  pair effect.

Periodic Properties - Question 4

Which ion has a higher polarizing power?

Detailed Solution for Periodic Properties - Question 4

Small cation has more polarizing power.

Periodic Properties - Question 5

Which is correct in the following?

Detailed Solution for Periodic Properties - Question 5

The atomic radius decreases along the period,also cations are always smaller than their parent atom and anions are always larger han their parent atom

Periodic Properties - Question 6

The IP1,IP2,IP3,IP4 and IP5 of an element are 7.1, 14.3,34.5,46.8,162.2,eV respectively. The element is likely to be:

Detailed Solution for Periodic Properties - Question 6

The biggest jump in IP values exist in IP5 and thus, element contains four electrons in its valency shell.

Periodic Properties - Question 7

Detailed Solution for Periodic Properties - Question 7

Cations are smaller in size than their parent atoms.

Periodic Properties - Question 8

The electronic configuration of four elements L,P,Q and R are given below,   (a)L=1s2,2s22p4        (b) Q=1s2,2s22p6,3s23p5   (c) P=1s25,2s22p6,3s1               (d) R=1s2,2s22p6,3s
The formula of the ionic compounds that can be formed between these elements are:

Detailed Solution for Periodic Properties - Question 8

Periodic Properties - Question 9

Which of the following characteristics regarding halogens is not correct?

Detailed Solution for Periodic Properties - Question 9

Electron affinity order for halogens is CI > F > Br > I.

Periodic Properties - Question 10

Which one of the following elements has lower value of ionisation energy?

Detailed Solution for Periodic Properties - Question 10

Ionisation energy  decreases down the group and increases along the period.

Periodic Properties - Question 11

In which of the following process, energy in liberated?

Detailed Solution for Periodic Properties - Question 11

First electron affinity is energy releasing process.

Periodic Properties - Question 12

The electronegativity of the following elements increases in the order

Detailed Solution for Periodic Properties - Question 12

On moving along a period from left to right in periodic table, electrnegativity increases ( due to decrease in size). While on moving downward in a group, electronegativity decreases.
Thus, the correct order of electronegaticity is
Si > P > C > N
(1.8) (2.1) (2.5) (3.0)

Periodic Properties - Question 13

Which has the largest first ionisation energy?

Detailed Solution for Periodic Properties - Question 13

The ionisation energy of elements decreases down the group, due to decrease in Zeff

Periodic Properties - Question 14

The hydration energy of Mg2+ is larger than that of:

Detailed Solution for Periodic Properties - Question 14

Mg2+ is smaller than Na+ thus, smaller is cation more is hydration energy.

Periodic Properties - Question 15

If the ionic radii of K+ and F- are about 1.34  each, then the expected values of atomic radii of K and F should be respectively:

Detailed Solution for Periodic Properties - Question 15

Cations are always shorter than their parent atom, anion are always bigger.

Periodic Properties - Question 16

The size of ionic speices is correcly given in the order.

Detailed Solution for Periodic Properties - Question 16

All are isoelectronic species; more is nuclear charge, smaller is ionic size.

Periodic Properties - Question 17

The order of first electron affinity of O,S and Se is:

Detailed Solution for Periodic Properties - Question 17

Electron affinty decreases down the group, but ‘O’ has small atomic size and 2p-orbital becomes very compact and already has 6 electrons, hence, there is a repulsive force among the already present and added electron, is used to reduce the  repulsion. Hence, the E.A of O is less than S, so the order is S > Se > O.

Periodic Properties - Question 18

Which statement is correct?

Detailed Solution for Periodic Properties - Question 18

Cations are always shorter than their parent atom, anion are always bigger.

Periodic Properties - Question 19

If the ionization potential for hydrogen atom is 13.6 eV, then the ionzation potential for He+ ion should be:

Detailed Solution for Periodic Properties - Question 19

E1 for He+ = E1 for H x Z2 (where Z = at.no. of He).

Periodic Properties - Question 20

The energy relased when a neutral gaseous atom  takes up an electron is called:

Detailed Solution for Periodic Properties - Question 20

It is the definition of electron affinity.

Periodic Properties - Question 21

On moving from left to right across a period in the table the metallic character

Periodic Properties - Question 22

The correct order of decreasing polarisability of ions is:

Detailed Solution for Periodic Properties - Question 22

Larger is anion,more is its polarizability.

Periodic Properties - Question 23

Which set have strongest tendency to form anions?

Detailed Solution for Periodic Properties - Question 23

All are non-metals

Periodic Properties - Question 24

Which one pair of atoms or ions will have same configuration?

Detailed Solution for Periodic Properties - Question 24

Both possess 1s2,2s22p6,3s23p6  configuration.

Periodic Properties - Question 25

The element having lowest ionisation energy among the following is:

Detailed Solution for Periodic Properties - Question 25

Removal of electron is easier in the order of shell 4 > 3 > 2 > 1

Periodic Properties - Question 26

Which ion is not isoelectronic with O2-?

Detailed Solution for Periodic Properties - Question 26

Ti+ has 21 electrons in it. Rest all have 10 electrons.

Periodic Properties - Question 27

Which of the following is isoelectronic with carbon atom?

Detailed Solution for Periodic Properties - Question 27

Both C and N+ have six electrons.

Periodic Properties - Question 28

Which of the following oxides is not expected to react with sodium hydroxide?

Detailed Solution for Periodic Properties - Question 28

NaOH as well as CaO are basic in nature.

Periodic Properties - Question 29

Amongst the elements with following electronic cinfigurations,which one of them may have the highest ionization energy?

Detailed Solution for Periodic Properties - Question 29

Half filled orbitals are more stable and element with 3p canfiguration is smaller then 4p.

Periodic Properties - Question 30

The incorrect statement among the following is:

Detailed Solution for Periodic Properties - Question 30

The removal of second electron from Mg tales place from 3s-orbital whereas, the removal of second electron from Na takes place from 2p-orbital. More closer are shells to the nucleus, difficult is removal of electron.