A mixture of silica and sodium carbonate or potassium carbonate while heating at 8000C melts and forms sodium silicate or potassium silicate. It is soluble in water, so it is called water .....

A glass is an amorphous transparent homogenous mixture of silicates of alkali metals and silicates of alkaline earth metals.   Ordinary glass is the mixture of 50% silica, 15% sodium carbonate, 10% calcium carbonate and 25% glass .....

The uses of Cement are: 1. Cement is used for making houses, buildings, roads etc 2. It is used for flooring and roofing. 3. RCC is used for framework of iron rods. 4. It is used for making pillars, bridges .....

Bakelite is made by condensation and polymerization of formaldehyde and carbonic acid. It is dark brown in color which is brittle and hard. It is used in electric fitting, to make handles of cook .....

It is a polymer of styrene. It is a hard, transparent and light plastic. It is used for making toys, thermos flask, ceiling tiles .....

The fertilizers which contain more than one primary plant nutrients are called mixed fertilizers. For Eg: Ammonium hydrogen phosphate, potassium nitrate .....

Polymerization is the process of forming a long chain of .....

Monomer is a small organic molecule which can combine together in large number to form a big molecule called polymer. For Eg: Ethene, styrene .....

Slurry is a material which makes the particle flow .....

The substances which are added in the soil to increase the fertility of soil are called .....

Manures are the organic substances obtained from the decomposition of dead plants and animals .....

The synthetic compounds which are composed of carbon, hydrogen and oxygen are called organic .....

The poisonous chemical substances which are used to kill harmful insects are called .....

Synthetic detergent is the sodium salt of a long chain benzene sulphonic acid or the sodium salt of a long chain alkyl hydrogen sulphate, which has cleansing properties in .....

Soaps are the sodium salts of long chain fatty acids which have cleansing properties in .....

The fibres which are obtained from animals and plants are called natural .....

A plastic is a synthetic material, which can be moulded or set into any desired shape when soft, and then hardened to produce a durable .....

The process of preparation of polymer from monomers is called .....

When an excess of ethyl alcohol is heated with concentrated sulphuric acid at 140oC, ether is .....

The alcohols which contain one hydroxyl group are called monohydric .....

Alcohol is an organic compound containing the hydroxyl group attached to a saturated carbon atom or a hydrocarbon .....

A functional group is an atom or group of atoms which defines the structure of a particular family of organic .....

An unsaturated hydrocarbon in which the two carbon atoms are connected by a triple bond is called an .....

The hydrocarbon in which all the four valencies of a carbon atom are used as a single covalent bonds is called an .....

A compound made up of hydrogen and carbon only is called .....

The branch of chemistry in which we study about organic compounds is called organic .....

When silver reacts with concentrated nitric acid, silver nitrate, nitrogen dioxide and water are .....

When silver reacts with hot and concentrated sulphuric acid, silver sulphate, sulphur dioxide and water are .....

When copper reacts with a concentrated hydrochloric acid, it forms cuprous chloride with the liberation of hydrogen .....

When copper is heated in dry air, copper is gradually converted into copper oxide and finally red cuprous oxide at a higher .....

When aluminium is strongly heated in oxygen, it burns to form aluminium .....

When steam is passed over red-hot iron, ferroso-ferric oxide and hydrogen gas are .....

Aquaregia is the mixture of conc. HCl and conc. HNO3 in the ratio of .....

Roasting is the process of conversion of the calcinated ore into metallic oxide by heating at a temperature below its melting point in excess of .....

The process in which the lumps of the ores are crushed into smaller pieces with the help of crusher or hammer is called crushing of the .....

Forest fire must be .....

It is called so because silkworm produces a valuable fibre that is silk. By rearing of silkworm commercially, we can earn money. Similarly, silkworms are also used to prepare strings which are used for surgical and fishing purpose. Not only that but .....

.....

The difference are as follows:   S.N. Drone Bee: S.N. .....

The two uses of honey bees are as follows: → Honeybees are important for apiculture, through which honey is manufactured in a large scale. → Honey bees manufacture natural wax which is used in quality candles, cosmetics and polishing .....

Cocoon is used to obtain silk thread, about 1000 metres of silk thread can be yielded from a single cocoon. In the winter season, there is a scarcity of mulberry leaves. We have not enough leaves for feeding larva. So, we kept eggs in cold place and .....

The main features are: