drawbacks of Dalton’s atomic theory free pdf 2022

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drawbacks of Dalton’s atomic theory

Que 1-State drawbacks of Dalton’s atomic theory of matter.
Ans– Some of the drawbacks of Dalton’s atomic theory of matter are
1- According to Dalton’s atomic theory, matter is indivisible, i.e., which cannot be divided.
But now it is known that under special circumstances, atoms can be divided into still smaller particles called electrons, protons and neutrons.

2- Dalton’s atomic theory fails to explain why substances like charcoal, graphite and diamond have different properties when all these substances are made up of the same type of atoms, called carbon atoms.
3- Dalton’s atomic theory postulated that all the atoms of the same element have exactly the same mass. It is now known that isotopes are atom of the same clement but have different masses.
4- It is now known that some atoms called isobars have same masses but these belong to different elements. Whereas Dalton’s atomic theory says that atoms of different atoms have different masses

Que 2 -Give one major drawback of Dalton’s atomic theory of matter.
Ans– One of the major drawback of Dalton’s atomic theory is that Dalton postulated that atom is the smallest particle of matter. But now it is established that atom can be further sub-divided into still smaller particles called electrons, protons and neutrons.

Que 3-Carbon and oxygen combine in two different ways to form carbon dioxide and carbon monoxide. In carbon monoxide, 12 g carbon combines with 16 g oxygen. In carbon dioxide 12 g carbon combines with 32 g oxygen. Which law of combination is illustrated by this experiment ? Explain.
Ans– The above experiment illustrates law of multiple proportions, 16 g and 32 g of oxygen respectively are required to combine with a fixed weight, i.e., 12 g of carbon to form carbon monoxide and carbon dioxide. The ratio of oxygen which combines with a fixed weight of carbon is 16 : 32 or 1 : 2, a simple whole number. This is law of multiple proportions.

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drawbacks of Dalton's atomic theory free pdf 2022
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drawbacks of Dalton’s atomic theory free pdf 2022