Class IX

When one gram of carbohydrates (CnH2mOm) completely burnt, released energy is
  1. 12 kilojoules
  2. 14kilojoules
  3. 16 kilojoules
  4. 18 kilojoules
Rubber fruits depend upon seed dispersal mechanism of
  1. wind
  2. insects
  3. explosive mechanism
  4. water
Selective reabsorption mainly occurs through
  1. water
  2. pressure in afferent arteriole
  3. renal pelvis
  4. osmosis stream
Sucrose (C12H22O11) is also known as
  1. peptidase
  2. invertase
  3. protease
  4. enterokinase
Use of non-fossil fuel in factory may
  1. help in lesser air pollution
  2. increase pollution due to chimney fumes when fossil fuel is burnt
  3. lower air quality in densely populated areas
  4. increase land pollution
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