EASY
9th CBSE
IMPORTANT
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State the law of constant proportions. This law is also called the law of definite composition. Is it true or false?

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 4
Write the names of the two laws of chemical combinations which lead to the idea of atoms.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
State the law of constant composition.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 6
Write the main postulates of Dalton's atomic theory.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
The type and number of atoms in a compound are _____ irrespective of source.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
In a chemical reaction the mass is _____. [conserved / variable]
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
Law of conservation of mass was proposed by _____. (Lavoisier / Dalton)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
Law of constant proportion was proposed by _____. (Proust /John Dalton / Lavoisier)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 7
Choose the correct word from the brackets to fill in the blank.
The atomic theory of matter was proposed by _____. (Dalton / Bohr / Rutherford)