Question

True Or False :-

a) The food synthesized by plants is stored as starch .

b) Digestion of starch starts in the stomach .

c) Silk is obtained from the cocoon of a silk moth .

d) Nitric acid turns red litmus blue .

e) Change of colour in an acid or base depends on the type of indicator

used . ​

Answer 1

Answer:

(a) true

(b) true

(c) false

(d) true

Answer 2

$\Large{\underline{\underline{\red{\tt{\purple{\leadsto } AnsweR:-}}}}}$

a) The food synthesized by plants is stored as starch .

$\underline{\purple{\sf \orange{\dag} Explanation }}$

The given statement is true , plants stored in the food in form of starch . This is so because starch is osmoticaly non-active hence there is no issue of osmolariy while storing starch by plants .

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b) Digestion of starch starts in the stomach .

$\underline{\purple{\sf \orange{\dag} Explanation }}$

The given statement is false digestion itself starts from the mouth where starch is broken down into maltose in the presence of salivary amylase or ptylin .

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c) Silk is obtained from the cocoon of a silk moth .

$\underline{\purple{\sf \orange{\dag} Explanation }}$

Yes the given statement is true . The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity (sericulture).

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d) Nitric acid turns red litmus blue .

$\underline{\purple{\sf \orange{\dag} Explanation }}$

The given statement is false . Nitric Acid is an acid and acids have a property to change blue litmus red and and it does not changes the colour of red litmus paper .

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e) Change of colour in an acid or base depends on the type of indicator .

$\underline{\purple{\sf \orange{\dag} Explanation }}$

Yes the statement is true . The changes colour in acid and base. Different indicators change to different colours in the presence of acids or base .