CGL 23 21-07-2023 Shift 1


Question 1


In Which year did John Newlands propound the ‘Law of Octaves' an innovative concept proposing the periodicity of chemical elements arranged in the order of atomic weight?

जॉन न्यूलैंड्स ने परमाणु भार के क्रम में व्यवस्थित रासायनिक तत्वों की आवर्तिता का प्रस्ताव देते हुए एक नवोन्‍मेषी अवधारणा 'अष्टक के नियम' को किस वर्ष में प्रतिपादित किया था?

Options

A

1865

1865

B

1863

1863

C

1861 

1861 

D

1867

1867


Solution:

Correct Answer:

A

1865

1865


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