P-1 Periodic Classification of Element — Science STD 10 — Question

Write the characters of each of the following animals with the help of classification chart: Bath sponge.

(neck, lungs, skin, exoskeleton, amphibian, metamorphose, aquatic, gills)
Class Amphibia consist of animals which are strictly ……….. only during their larval stages. At that time they breathe through their …………. Tadpoles are such stages which later ………… to form adult frog. Adult frog respires with the help of ………… when in water and with when on land. Thus, it is a true …………. For performing cutaneous respiration, i.e. respiration through skin, they lack ………. in any form. The skin is also kept moist by staying near the water bodies. Amphibians do not have a ………… but eyes are bulging and prominent, this solves the problems of vision.

In the Chlorination, substitution reaction of propane.
Two isomeric products containing one chlorine atom are obtained. Draw their structural formula and give their IUPAC names.

In the following figure, explain how new fungal colonies of mucor are formed:

Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a Parallel circuit to an identical power supply line.

1. Which circuit would have the highest voltage across each bulb?
2. In which circuit would the bulbs be brighter?
3. In which circuit, if one bulb blows out, all others will stop glowing
4. Which circuit would have less current in it?

What were the limitations of Newlands’ law of octaves?

Describe the New Cartesian Sign Convention used in optics. Draw a labelled diagram to illustrate this sign convention.

Explain the role of district disaster control unit after occurrence of any disaster.