1.

Explain vegetative propagation with the help of two examples.A copper wire has diameter 0.5mm and resistivity of 1.6x10-8 ohm-m. what will be the lengthof this wire to make its resistance 10ohm?(3)what will happen if a solution of sodium hydrocarbon is heated? Give the equation of reaction involved.b) write an equation to show the reaction between P.O.P. and water?v) what is the chemical name of P.O.P. Write uses of P.O.P.(5)​

Answer»

Explanation:

The chemical NAME of plaster of Paris is calcium sulphate hemihydrate because half-molecule of water is attached with calcium sulphate. The chemical formula of plaster of Paris is CASO

4

.1/2H2O.

Advantages:

It is light in weight and more durable.

It has low thermal conductivity.

It is very good fire resistant and HENCE a very good heat insulating material.

It is not likely to cause cracking of surfaces.

It has no appreciable chemical action on paint and does not cause alkali attack.

Plaster of Paris gives a decorative INTERIOR FINISH.



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