Question

Q. The following organisms form a food chain. Insect, Hawk, Grass, Snake, Frog Which of these will have highest concentration of non-biodegradable chemicals? Name the phenomenon.

Answer 1

Dear student,
Q22a) Phenolphthalein in Acetic acid will be colourless. Phenolphthalein is an indicator which will be colourless in acid and pink in base.
b) Acetic acid will be soluble in distilled water.
c) Yellowish pink colour will be observed on addition of universal indicator in acetic acid reflecting the pH near to 6.
d) On NaHCO_​3 will bw added to acetic acid , brisk effervescence of carbon dioxide will be observed in the test tube.

Q23) a) In this case , foam will be observed as there will be no Calcium or Potassium salt in water which means no hardness.
b) In this case scum will be formed due to the presence of CaSO₄ , which will react with soap to form scum.
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