Class XI

Daltons atomic theory could not explain one of the following
  1. Law of constant composition
  2. Discovery of sub-atomic particles
  3. Law of multiple Proportions,
  4. Law of conservation of mass
One of the orbitals is non-directional
  1. f- orbital
  2. s- orbital
  3. p- orbital
  4. d- orbital
in the Thomson Model of Atom
  1. electrons oscillate about the nucleus
  2. electrons are embedded in a positively charged pudding or water melon
  3. electrons swarm like flies around nucleus
  4. electrons move in circular orbits around nucleus
Maximum number of electrons in a subshell with l = 3 and n = 4 is
  1. 14
  2. 16
  3. 32
  4. 12
Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference between the numbers of total p and total s electrons.
  1. Kr ( atomic no.=36)
  2. As ( atomic no.=36)
  3. Br ( atomic no.=36
  4. Cl ( atomic no.=36)
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