More Classes

5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject

ECAT Chemistry Chapter 12 Periodic Classification of Elements and Periodicity Online Test MCQs With Answers

Question # 1

In a period, melting points of elements

Choose an answer

Increases

Decreases

Remain constant

First increases then decreases

Skip

Question # 2

Which of the following isoelectronic ions has the lowest ionization energy?

Choose an answer

K⁺

Ca²⁺

Cl^-

S^2-

Skip

Question # 3

Alkali metals in each period have

Choose an answer

Smallest size

Lowest IE

Highest IE

Highest electronegativity

Skip

Question # 4

Keeping in view the size of atoms, which order is the correct one

Choose an answer

Mg > Sr

Ba > Mg

Lu > Ce

Cl > l

Skip

Question # 5

What is the nature of SO₂

Choose an answer

Basic

Strongly acidic

Weakly acidic

Amphoteric

Skip

Question # 6

Which orbital is in the process of completion in case of transition elements

Choose an answer

p-orbital

f-orbital

d-orbital

s-orbital

Skip

Question # 7

The positive ion is always smaller than the neutral atom while the negative ion is always bigger than the neutral atom. The atomic and ionic radii of Na, F, Na⁺, F^-are in ppm

Choose an answer

Na F Na⁺ F^-

157 72 95 136

Na F Na⁺ F^-

157 95 172 136

Na F Na⁺ F^-

72 95 136 157

Na F Na⁺ F^-

157 136 95 72

Skip

Question # 8

The elements of group lA are called

Choose an answer

Chalocogens

Halogens

Alkali metals

Alkaline earth metals

Skip

Question # 9

Which is not interstitial hydride

Choose an answer

LaH

TaH

None

Skip

Question # 10

Which of the following statement about fluorine is not correct?

Choose an answer

Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

Skip

Question # 11

NaBH₄and LialH₄are

Choose an answer

Ionic hydrides

Covalent hydrides

Interposal hydrides

Complex hydrides

Skip

Question # 12

Na₂O is

Choose an answer

Acidic

Basic

Neutral

Amphoteric

Skip

Back