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

Which is the real bleaching agent present in bleaching powder?

What type of chemical bonds are present in a solid compound which has a high melting point, does not conduct electricity in the solid state but becomes a good conductor in the molten state?

What is the function of anaerobic micro-organisms such as anaerobic bacteria in a biogas plant?

Name the device which converts sunlight into electricity.

Name the procedure used in the working of artificial kidney.

Give one example of a chemical reaction.

The power of a lens with focal length 20 cm is………..

Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non-metal respectively.

How does the wire in the filament of a light bulb behave differently to the other wires in the circuit when the current flows?