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Which one of the following statement is not true?

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Important Questions on Structure of Atom

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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 29

Dalton's atomic theory successfully explained:

(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions

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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 30
Which one of the following laws explains the formation of carbon monoxide and carbon dioxide from carbon and oxygen?
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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 31
The atomic weights are expressed in terms of atomic mass unit. Which one of the following is used as a standard?
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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 32
Which would be the electrical charge on a sulphur atom containing 18 electrons?
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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 33
The atomic number of an element is 11 and its mass number is 23. The correct order representing the number of electrons, protons and neutrons respectively in this atom is:
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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 34
In an atom, valence electrons are present in:
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General Science for Competitive Exams>Chapter 10 - Structure of Atom>EXERCISE>Q 35
In a chemical change the total weight of the reacting substances compared to total weight of products is: