You know that electrical energy can be converted into many other forms. Write down some examples.

Features of ore and impurity are given in the table. Write down the method usedfor theseparation of theore. How can we convert ore into its oxide form. Explain with proper examples.

Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Write down any other practical utility of electrolysis.

Galvanic cell Is a device which converts chemical energy to electrical energy.How many coulombs of electricity are required for the reduction of 1mol of MnO_4^- to Mn^(2+) ?

Many food chains are interconnected to each other form a network _____

We know that heat is emitted along with light when a bulb glows. .LED lamps are better than filament bulbs for maximum reduction in the consumption of electrical energy. Explain. Are there situations where filament. bulbs are used for producing Light energy? Give examples.

Convert 1 kilowatt hour of electric energy into Joules.

Boron is an element with atomic number 5. Write down some compounds of boron.