Dalton's Atomic Theory( Concept of Atom, Molecule, Element, and Compound) NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Dalton's Atomic Theory( Concept of Atom, Molecule, Element, and Compound) MCQ Questions


13.
According to Dalton, atoms are:
A.
Indivisible
B.
Divisible
C.
Charged
D.
Non-existent
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ANSWER :
A. Indivisible
14.
Which of the following is NOT a molecule?
A.
Oâ‚‚
B.
Nâ‚‚
C.
He
D.
Mg
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ANSWER :
D. Mg
15.
The smallest unit of an element that retains its properties is called:
A.
Molecule
B.
Compound
C.
Element
D.
Ion
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ANSWER :
A. Molecule
16.
Which scientist’s work later led to the modification of Dalton’s atomic theory?
A.
J.J. Thomson
B.
Rutherford
C.
Bohr
D.
Chadwick
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ANSWER :
B. Rutherford
17.
A molecule of an element contains:
A.
Different atoms
B.
Similar atoms
C.
More than one type of atom
D.
Atoms of the same element
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ANSWER :
D. Atoms of the same element
18.
Which of the following is a compound?
A.
NaCl
B.
Hâ‚‚
C.
COâ‚‚
D.
MgO
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ANSWER :
C. COâ‚‚