Class XI

A given compound always contains exactly the same proportion of elements by weight. This law is stated by
  1. Proust
  2. Avagadro
  3. Gay Lussac
  4. Dalton
Particles of compounds are
  1. heterogeneous mixtures .
  2. atoms.
  3. homogeneous mixtures
  4. molecules of two or more atoms of different elements
According to Gay Lussac’s Law of Gaseous Volumes, " when gases combine or are produced in a chemical reaction they do so in a ______ ratio by volumes provided all gases are at same temperature and pressure."
  1. uncertain
  2. inverse
  3. simple
  4. equal
Chemistry does not play a major role in
  1. Large scale production of a variety of fertilizers
  2. Design and synthesis new materials having specific magnetic, electric and optical properties.
  3. Explaining superconductivity
  4. Explaining ozone depletion
Chemistry does not play a major role in
  1. Design and synthesis new materials having specific magnetic, electric and optical properties.
  2. Large scale production of a variety of fertilizers
  3. Explaining superconductivity
  4. Explaining ozone depletion
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