Periodic Classification of Elements UPSC Questions

Chemistry

Periodic Classification of Elements MCQ Questions


13.

Identify the TRUE statements from the following
a) John Newlands arranged the known elements in the order of increasing atomic masses.
b) He started with the element having the lowest atomic mass (hydrogen) and ended at thorium which was the 56th element.
c) He found that every eighth element had properties similar to that of the first.
d) He compared this to the octaves found in music. Therefore, he called it the ‘Law of Octaves’

A.

Only d

B.

Both a and b

C.

All a,b,c,d

D.

Only b

😑 View Answer Rough Work Error
ANSWER :

C. All a,b,c,d

14.
The metals produce ringing sound is called
A.
Resonance
B.
Permitivity
C.
Sonorous
D.
None of the above
😑 View Answer Rough Work Error
ANSWER :
C. Sonorous
15.
Which of the following about metals is correct (i) Metals are hard except sodium (ii)They are shiny (iii) They are malleable and ductile (iv) They are electropositive in nature
A.
(i) and (ii) only
B.
(ii) and (iii) only
C.
(i), (ii) and (iii) only
D.
All the above
😑 View Answer Rough Work Error
ANSWER :
D. All the above
16.
In Newlands' Octaves, what were the two elements where their properties found to be the same?
A.
Sodium and Potassium
B.
Lithium and Sodium
C.
Argon and Neon
D.
Oxygen and Boron
😑 View Answer Rough Work Error
ANSWER :
B. Lithium and Sodium
17.
Which of the following can be beaten into thin sheets?
A.
Zinc
B.
Phosphorus
C.
Sulphur
D.
Oxygen
😑 View Answer Rough Work Error
ANSWER :
A. Zinc
18.
It was found that the Law of Octaves was applicable only up to _____ as after that every eighth element did not possess properties similar to that of the first.
A.
Calcium
B.
Lithium
C.
Carbon
D.
Hydrogen
😑 View Answer Rough Work Error
ANSWER :
A. Calcium