Name any four relfex action that is done to avoid sudden danger to you.

Mention any four characteristics features of phylum Mollusca. Write the scientific name of any one animal belonging to this phylum.

Give any four characteristic features of phylum Echinodermata. Give the name of any animal belonging to this phylum.

Do you know the name of any other season apart from Summer, Monsoon, Autumn and Winter?

In the given figure, name (i) any six points (ii) any five line segments (iii) any four rays (iv) any four lines (v) any four collinear points

(a) Which salivary gland contributes maximally to saliva secreation? (b) mention the enzymes in saliva.(c) Is there any bacteriolytic action of saliva? If so, state how it is done?

Draw V-I characteristics of p-n junction diode. Answer the following questions giving reasons: Why does the reverse current show a sudden increase at the critical voltage? Name any semiconductor device which operates under the reverse bias in the breakdown region.

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement -I: Sudden expansion of ideal gases from high pressure to low pressure, will not show any temperature change. Statement - II : Intermolecular force and joule- Thomson coefficient of ideal gases is zero.