Daltons Atomic Theory
Category : 9th Class
John Dalton provided the basic theory about the nature of matter. He used the idea of divisibility of matter and called the smallest particle of matter as atoms. It was based on the theory of chemical combination. He also provided the explanation on laws of conservation of mass and laws of constant proportion. According to Daltons atomic theory all the matters is composed of smallest particles called atom.
The postulates of this theory are:
Merits of Dalton Atomic Theory
Demerits of Dalton Atomic Theory
To form water. Hydrogen and oxygen combine in the ratio 1:8. Find the mass of oxygen required to react completely with 3 g of hydrogen.
(a) 4 g
(b) 8 g
(c) 16 g
(d) 24 g
(e) None of these
Answer: (D)
Certain mass of carbon burns with a given mass of oxygen to form certain mass of carbon dioxide. Which law of chemical combination is used in this process of formation of compound.
(a) Laws of constant proportion
(b) Laws of multiple proportion
(c) Laws of conservation of mass
(d) Gay Luassc's law
(e) None of these
Answer (A)
Which postulates of Dalton Atomic Theory gives laws of conservation of mass?
(a) Atom of same elements are similar
(b) Atoms of different elements are different
(c) Atom can neither be created nor be destroyed
(d) Atom combine in fixed ratio to form compound
(e) None of these
Answer: (C))
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