Question

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Answer 1

Answer:

a) Ptyalin : Digests cooked starch

b) kink ensures that the mercury does not gets back immediately after the thermometer records the te6

c) Zn + HCl ---------> ZnCl + H2

d) the coating of Zinc layer on iron objects to prevent rusting

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Answer 2

Answer:

1.saliva contains amylase.this enzyme breaks some starches down into maltose and dextrin. thus digestion of food occurs within the mouth, even before reaches to stomach.

2.kink is present in thermometer because that does not allow mercury to fall back into the bulb.

3.

4.galvanization is the process of applying a protective zinc coating to iron or steel, to prevent rusting. the most common method is hot deep galvanizing, in which steel sections are submerged in a bath of molten zinc.

Explanation: