Dalton's Atomic Theory - Class IX
Comprehensive quiz covering Dalton's atomic theory, its postulates, limitations, and basic atomic concepts
Questions
______ are the smallest unit of matter that can take part in a chemical reaction.
- Molecules
- Compounds
- Atoms
- Electrons
Dalton's theory fails to determine the existence of
- molecules
- compounds
- allotropes
- All of the above
According to Dalton, atoms of different elements combine with one another to form :
- compounds
- elements
- solution
- All of the above
Dalton had suggested that an atom is indivisible.
- True
- False
Which of the following is a postulate of Dalton's atomic theory?
- All matter consists of indivisible particles called atoms
- The atom is the smallest unit of matter that can take part in a chemical reaction
- Atoms of same element can combine in more than one ratio to form two or more compounds
- All of the above
Dalton's theory of same element have same mass and properties was proved wrong with the invention of:
- molecules
- isotopes
- neutrons
- compounds
A/An______ is the smallest particle of a substance which can take part in a chemical reaction.
- atom
- molecule
- both A and B
- none of the above
Various theories were put forth to study the nature of atom. The main postulates of Dalton's atomic theory are :
- all matter are composed of atoms
- all matters are composed of molecules
- all atoms of an element are identical.
- the atoms of different elements vary in size and mass.
Dalton suggested that atoms were indestructible and unchangeable to explain:
- why mass is conserved in chemical reactions.
- why elements combine in fixed weight ratios to form compounds.
- why elements are characterized by the mass of their atoms.
- why compounds combine in fixed weight ratios in chemical reactions.
Which of the following is not a postulate of Dalton's atomic theory?
- Different elements have atoms of different masses.
- Atoms combine in simple whole number ratios to form compounds..
- Atoms are not created or destroyed in chemical change.
- Atoms of a single element can have different masses.
Dalton said that elements are distinguished from each other by :
- the charge on their ions
- the density of their solid forms
- the weights of their atoms
- the shapes of their atoms
Who was the first scientist which proposed that "Matter is made up of indivisible particles called atoms"?
- Lavoiser
- Dalton
- Thomson
- Faraday
Atoms of different elements combine in :
- unequal ratios.
- prime number ratios.
- equal ratios.
- whole number ratios.
Dalton's atomic theory was not accepted fully :
- when atoms combine It must be presumed to be a binary one, unless some cause appear to the contrary.
- when elements react, their atoms sometimes combine in more than one simple, whole-number ratio.
- elements are characterized by the mass of their atoms.
- None of the above
Which of the following is a merit of Dalton's atomic theory?
- Laws of chemical combination
- Distinction between the fundamental particle of an element (atom) and that of a compound (molecule)
- Both A and B
- None of the above
Among the following, which one can not be further broken down by chemical means?
- Cation
- Inert Gas
- Crystal
- Anion
- Element
Which one proposes the basic postulates concerning elements and atoms?
- Avogadro's number
- $P _1V _1=P _2V _2$
- $V _1T _2=V _2T _1$
- Dalton's theory
- Gay-Lussac's Law
Which of the following is not part of the Atomic Theory?
- Compounds are made up of combinations of atoms
- All atoms of a given element are alike
- All matter is composed of atoms
- A chemical reaction involves the rearrangement of atoms
- The atom is mainly empty space
An important postulate of Dalton's atomic theory is:
- an atom contains electrons, protons and neutrons
- atom can neither be created nor destroyed nor divisible
- all the atoms of an element are not identical
- all the elements are available in nature in the form of atoms
The nucleus of the atom $\left( Z>1 \right) $ consists of:
- Proton and neutron.
- Proton and electron.
- Neutron and electron.
- Proton, neutron and electrons
Which of the following species has more number of protons than the number of electrons?
- $F^-$
- $Na^+$
- $O^{2-}$
- $Ne$