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


7.
According to Dalton's atomic theory, atoms are:
A.
Divisible into smaller particles
B.
Continuously created and destroyed
C.
Indivisible and indestructible
D.
Composed of protons, neutrons, and electrons
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ANSWER :
C. Indivisible and indestructible
8.
Which of the following is NOT a postulate of Dalton's atomic theory?
A.
Atoms of different elements have different masses and properties
B.
Atoms can be subdivided into protons, neutrons, and electrons
C.
Matter is composed of indivisible atoms
D.
All atoms of a given element are identical in mass and properties
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ANSWER :
B. Atoms can be subdivided into protons, neutrons, and electrons
9.
According to Dalton's theory, atoms of the same element:
A.
Combine to form compounds in variable ratios
B.
May have different chemical properties
C.
Have different masses
D.
Are identical in mass and all properties
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ANSWER :
D. Are identical in mass and all properties
10.
Dalton's atomic theory states that compounds are formed when atoms of different elements combine:
A.
In a fixed, simple, whole-number ratio
B.
Without any specific pattern
C.
In a variable ratio
D.
In equal numbers always
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ANSWER :
A. In a fixed, simple, whole-number ratio
11.
In a chemical reaction, according to Dalton's theory, atoms are:
A.
Destroyed and converted to energy
B.
Created from energy
C.
Neither created nor destroyed; only rearranged
D.
Converted from one element to another
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ANSWER :
C. Neither created nor destroyed; only rearranged
12.
Which postulate of Dalton's atomic theory has been modified due to the discovery of isotopes?
A.
All atoms of an element are identical in mass and properties
B.
Atoms are reorganized in chemical reactions
C.
Atoms combine in fixed whole-number ratios
D.
Atoms are indivisible
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ANSWER :
A. All atoms of an element are identical in mass and properties