In another vessel take some clear lime water and with a piece of straw blow some air into it. WHat do you see happening?

Place some quicklime in a vessel and carefully pour some water on to it. What do you see?

Take a saucepan with a handle and hold it over a vessel in which water is boiled in your home to cook food. What do you see?

Write the sources of air & water pollution . What do you mean by Silent Valley Movement?

Take a bottle made out of a metal and stick a ballon (not blown) on its mouth. What state is the ballon in ?Now take a candle and carefully heat the bottom of the bottle. What do you see?

During electrolysis of molten NaCl, some water was added What will happen

During electrolysis of molten NaCl, some water was added. What will happen -

What do you mean by good and bad conductor? Give some examples of each. Define co-efficient of thermal expansion of solids. What is its SI unit.

An ionic alkali metal hydride has covalent character to some extent and it does not react with oxygen and chlorine. This hydride is used in the synthesis of another hydride. Write the formula of the hydride and what happens when it reacts with Al_(2)Cl_(6) .