NEET Chemistry: Dalton's atomic theory Practice Questions
15 free multiple-choice questions on Dalton's atomic theory (Some Basic Concepts in Chemistry) for NEET Chemistry, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Dalton's law of multiple proportions relates to the combination of elements to form compounds. This implies that the masses of the elements combined are in:
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Correct answer: C — Multiple ratios
The law of multiple proportions states that elements combine in simple whole number ratios by mass to form compounds.
Q2. Which postulate implies that chemical reactions are based on the rearrangement of atoms rather than the creation or destruction of atoms?
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Correct answer: B — Atoms combine in simple whole-number ratios
Dalton's theory assumes that atoms are neither created nor destroyed during a chemical reaction, only rearranged.
Q3. Dalton's theory provides a foundation for which fundamental law of chemistry?
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Correct answer: C — Law of Definite Proportions
The relationship between the masses of elements combining to form compounds is the basis for the Law of Multiple Proportions.
Q4. In Dalton's atomic theory, the combination of atoms to form different compounds is governed by the principle that atoms of different elements combine in what kind of relationship?
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Correct answer: D — simple whole-number ratios
Dalton's theory implies that atoms combine in simple whole-number ratios to form stable compounds, which relates to the Law of Definite Proportions.
Q5. The principle stating that atoms of different elements combine in fixed, simple whole-number ratios is an extension of which concept proposed by Dalton?
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Correct answer: C — Law of Multiple Proportions
The Law of Multiple Proportions, which deals with the ratios in which different elements combine, is closely related to Dalton's ideas about atomic combination.
Q6. In the context of Dalton's theory, what is the primary role of atoms?
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Correct answer: A — To be the fundamental, indivisible unit of matter
Dalton's theory posits that atoms are the fundamental, indivisible, and unchangeable building blocks of all matter.
Q7. According to Dalton's theory, atoms are considered to be:
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Correct answer: B — Indivisible
Dalton proposed that atoms are the smallest indivisible unit of matter.
Q8. According to Dalton's atomic theory, the law of multiple proportions implies that:
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Correct answer: C — Two or more elements can combine to form a fixed mass ratio.
The law of multiple proportions states that when two elements combine to form a compound, they do so in a fixed ratio by mass.
Q9. Consider the formation of a compound by the combination of two elements, X and Y. If X and Y combine to form compound XY, which of the following statements best reflects Dalton's postulate regarding the composition of these substances?
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Correct answer: A — Atoms of different elements combine in fixed whole-number ratios to form compounds.
Dalton's postulate states that atoms combine in fixed whole-number ratios to form compounds. This postulate is the foundation for the Law of Definite Proportions, meaning that for a given compound, the elements are always combined in the same ratio by mass.
Q10. According to Dalton's atomic theory, when elements combine to form compounds, the masses of the elements involved combine in what ratio?
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Correct answer: C — In a fixed ratio, based on their atomic masses
Dalton's law of definite proportions stated that when elements combine, they do so in a fixed ratio based on their relative atomic masses.
Q11. Which postulate of Dalton's atomic theory states that atoms are indivisible particles?
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Correct answer: B — Atoms are indivisible
Dalton postulated that atoms are the smallest, indivisible unit of matter.
Q12. If elements A and B combine to form a compound, what principle of Dalton's theory is relevant to the composition of the resulting compound?
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Correct answer: C — Law of Constant Proportions
The Law of Constant Proportions states that in a chemical compound, the elements are always present in a fixed ratio by mass.
Q13. If an atom is considered the smallest unit of an element that cannot be broken down further, which property does it inherently possess according to Dalton's initial model?
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Correct answer: B — It is indestructible
Dalton postulated that atoms are indivisible and indestructible particles, which is central to his theory.
Q14. According to Dalton's atomic theory, atoms of the same element are:
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Correct answer: D — Indistinguishable in mass
Atoms of the same element are fundamentally identical, meaning they have the same mass and properties.
Q15. If two elements combine to form a compound, the masses of the constituent elements must be in a certain ratio. This idea is related to which law, often discussed alongside Dalton's postulates?
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Correct answer: D — Law of Definite Proportions
The concept that elements combine in fixed mass ratios is formalized by the Law of Definite Proportions (or Constant Proportion).
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