Classification of Elements & Periodicity in Properties Test 11

Result

Classification of Elements & Periodicity in Properties Test 11

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not a merit of Mendeleev's periodic table?

A
It helped in correcting the atomic masses of some of the elements

B
He predicted the properties of some undiscovered elements and left gaps for them

C
He framed the periodic table with vertical and horizontal columns and gave shape to it

D
He gave separate places to isotopes in his periodic table

Solution

Mendeleev could not give separate places to isotopes which had different atomic weights in the periodic table
Question 2
1 / -0

What were the main demerits of Mendeleev's periodic table?
(i) Hydrogen has been placed in group I though it resembled to group VII as well.
(ii) Positions of some elements was not justified.
(iii) Isotopes were not given separate places.
(iv) Lanthanides and actinides were not included in the table.

A
(i), (ii) and (iii)

B
(i), (ii), (iii) and (iv)

C
(ii) and (iv)

D
(i), (iii) and (iv)

Solution

All are the demerits of Mendeleev's periodic table.
Question 3
1 / -0

Law of octaves stated

A
Every eighth element had properties similar to the first element

B
Every third element had properties similar to the first element

C
The properties of the middle element were in between the other two members

D
The properties of the elements were repeated after regular intervals of 3, 4 or 8 elements

Solution

Newland's Law of octaves stated that if elements (known at Newland's time) were arranged in increasing order of their atomic weights, every eighth element had properties similar to the first element. For example, Li and Na have similar properties.
Question 4
1 / -0

The periodic table of today owes its development to two chemists namely:

A
Rutherford and Moseley

B
Alexander Newlands and Dobereiner

C
Dmitri Mendeleev and Lothar Meyer

D
De Broglie and Neil Bohr

Solution

The periodic table of today owes its development to two chemists namely the Russian chemist Dmitri Mendeleev and the German chemist J. Lother Meyer. In 1869, they independently proposed that when the elements are arranged in the increasing order of their atomic weights, similarities in physical and chemical properties appear at regular intervals.
Question 5
1 / -0

The first periodic law stated by Mendeleev was:

A
There is no correlation in the properties and atomic weights of the elements

B
The properties of the elements are a periodic function of their atomic numbers

C
The properties of the elements are a periodic function of their atomic weights

D
The properties of the elements are a periodic function of their empirical formula

Solution

The first periodic law stated by Mendeleev was, "the physical and chemical properties of the elements are a periodic function of their atomic weights (atomic masses)." The elements having similar properties appeared in the same group (vertical column).