Symbols, Formulae and Simple Chemical Equations NDA Questions

NDA Chemistry

Symbols, Formulae and Simple Chemical Equations MCQ Questions


7.
An electron in the 2s, 2p or higher orbitals in a hydrogen atom is in _____
A.
Ground state
B.
Degenerate
C.
Generate
D.
Excited state
😑 View Answer Rough Work Error
ANSWER :
D. Excited state
8.
The total number of nodes are given by (n–1), i.e., sum of l angular nodes and _____ radial nodes.
A.
n-2
B.
n+1
C.
n-l
D.
(n – l – 1)
😑 View Answer Rough Work Error
ANSWER :
D. (n – l – 1)
9.
The smallest and lightest positive ion was obtained from hydrogen and was called _____
A.
Ray
B.
Anion
C.
Canal rays
D.
Proton
😑 View Answer Rough Work Error
ANSWER :
D. Proton
10.
The word ‘atom’ has been derived from the Greek word ‘a-tomio’ which means _____
A.
Non-divisible
B.
Uncuttable
C.
Both a and b
D.
Divisible
😑 View Answer Rough Work Error
ANSWER :
C. Both a and b
11.
Who was the first to propose the atomic theory of matter on a firm scientific basis?
A.
Albert Einstein
B.
John Dalton
C.
Robert Boyle
D.
James Chadwick
😑 View Answer Rough Work Error
ANSWER :
B. John Dalton
12.
Who discovered neutrons?
A.
Chadwick
B.
John Dalton
C.
J.J.Thomson
D.
Albert Einstein
😑 View Answer Rough Work Error
ANSWER :
A. Chadwick