Download App

Atoms and Molecules — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceAtoms and Molecules1 Mark
MCQ
The theory of Democritus state that:
  • A
    Everything is composed of "atoms", which are physically, but not geometrically, indivisible
  • B
    Between atoms, there lies empty space
  • C
    There are an infinite number of atoms
  • D
    All of the above
✓

Answer

  1. All of the above

Explanation:

Atoms and void are the bases of Democritus system for explaining the universe: solid indestructible atoms, infinite in number and shape, differing in size, but otherwise lacking in sensible qualities, were originally scattered throughout infinite void.

In general, the atoms were so small as to be invisible.

Atomos means that the atoms are physically indivisible.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Che-1M]" from Atoms and Molecules→Atoms and Molecules — all question types→Science STD 9 question papers→CBSE Board STD 9 question papers→CBSE Board question paper generator→

Similar questions

When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice during melting:
→
What is the basic unit of matter and is the smallest particle of an element?
→
The property/ properties which enable copper metal to be used for making electric wires is/ are:
  1. Copper metal is malleable and ductile.
  2. Copper metal is a good conductor of electricity.
  3. Copper metal is ductile and has low electrical resistance.
  4. Copper metal is sonorous and an excellent conductor of electricity.
→
Milk is an example of :
→
Protons and neutrons clump together to form the __________ of an atom.
→
Most of the alpha particles go straight through the foil if it is passed through a thin metal foil. This is due to the reason that:
→
In Rutherford's α-ray scattering experiment most of the alpha particles:
→
A particle X has 17 protons, 18 neutrons and 18 electrons. This particle is most likely to be:
→
Which of the following symbol of elements is not taken from Latin names:
→
In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
  1. Increasing pressure on hydrogen contained in a closed container.
  2. Some hydrogen gas leaking out of the container.
  3. Increasing the volume of the container of hydrogen gas.
  4. Adding more hydrogen gas to the container without increasing the volume of the container.
  1. (i) and (ii)
  2. (i) and (iv)
  3. (ii) and (iii)
  4. (ii) and (iv)
→