Entry Test MCQ :: Periodic Classification

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11.

Concept of Triads was introduced by

A.	Dobereiner	B.	Newland
C.	Mendeleev	D.	Al-Razi

12.

Which element was not known when Mendeleev proposed his classification?

A.	Hydrogen	B.	Sodium
C.	Copper	D.	Germanium

13.

Elements with similar chemical properties appear in the

A.	Same family	B.	Same period
C.	p block elements	D.	Right upper corner

14.

Noble gases are named so because they are

A.	less reactive	B.	Zero group elements
C.	Having completely filled valence shell	D.	All

15.

In modern periodic table all the leements are arranged in ascending order of

A.	Valency	B.	Atomic mass
C.	Atomic number	D.	Valence electrons

16.

The longest period in the modern periodic table is

A.	6th	B.	7th
C.	2nd and 3rd both	D.	5th

17.

Inner transition elements are called

A.	Lanthanides	B.	Actinides
C.	Rare earth metals	D.	All

18.

Seventh period contains ______________ normal elements

A.	2	B.	4
C.	6	D.	8

19.

Modern periodic table has been divided in _______ blocks

A.	2	B.	4
C.	8	D.	7

20.

Non-metals usually form ______________ oxides

A.	Acidic	B.	Amphoteric
C.	Neutral	D.	All of the above