Class XI

Using manganese oxide as a catalyst, in heating potassium chlorate (KClO3), manganese oxide (MnxOy)
  1. Evaporates
  2. Melts
  3. Remains unchanged
  4. Becomes magnesium carbonate
First stable form of carbohydrates (CnH2mOm) formed in photosynthesis is
  1. Complex sugars
  2. Disaccharides
  3. Cellulose
  4. Glucose
Survival of aquatic organisms only in their environment is an example of
  1. High specialization
  2. Less specialization
  3. Adaptation
  4. Metabolism
Hair erector muscles enable
  1. Hair to remain healthy
  2. Hair remain bouncy
  3. Hair to stand on end
  4. All of these
If adrenaline increases blood flow in muscles, long term effect will be
  1. Feeling of being more alive
  2. Vasoconstriction of muscles occurs
  3. An improved muscular performance
  4. Muscles becoming tense and painful
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