Class XI

More corrosive acid is
  1. H2CO3
  2. H2SO3
  3. HNO3
  4. C6H8O7
Rate of diffusion is
  1. gene bundling
  2. increased if temperature is increased
  3. decreases if kinetic energy decreases
  4. all of these
 Crude oil can be fractionally distilled to produce
  1. diesel
  2. petrol
  3. paraffin
  4. all of these
Mixtures have
  1. a range of boiling points
  2. a range of melting points
  3. a lack of exact concentrations
  4. all of these
Chemical formula of silver bromide is
  1. Ag2Br3
  2. AgBr
  3. AgBrO
  4. AgBr3.H2O
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