Question

Q-21 State the role of the following in human digestive system:
(b) Hydrochloric acid
Q-21 (a) What is opmmon for cuscuta, ticks and leeches?
(b) How does acidic medium in the small intestine is converted into alkaline for
pancreatic enzymes?
0-22 (a) Name the balloon like structures present in lungs. Mention any one use of it.
0-23 (a) C3Hg. C4Hg and C5H1o belong to the same homologous series.
() Define homologous series.
() Why is the melting point of C5H1o more than C4H3?
Q-23 Write the molecular formula of the Ethene compound and draw its electron dot structu
Q-24 Write any two necessary conditions for the formation of a rainbow.
Q-25 Find the equivalent resistance in the given circuit.
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Answer 1

$\huge{\tt{\red{}\green{A}\purple{N}\pink{S}\blue{W}\orange{E}\red{R}}}$

Digestive enzymes help in the digestion of food. Hydrochloric acid kills bacteria that may accompany the food. Villi increases the surface area of small intestine.