Question

1. ASSERTION:- Elements are classified on the basis of similarities in their properties. REASON:- Döbereiner grouped the elements into triads and Newlands gave the Law of Octaves *

A

B

C

D

E​

Answer 1

Answer:

Correct option is A.. Law of Octaves

Explanation:

In 1864 newlands in chemistry, the generalization made by the English chemist J.A.R. Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements. Newlands was one of the first to detect a periodic pattern in the properties of the elements and anticipated later developments of the periodic law. Hence called law of octaves.