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Metals such as sodium, magnesium, calcium, aluminium high up in the reactivity series are very reactive and cannot be obtained from their compounds by heating with carbon. This is because these metals have more affinity for oxygen than carbon. These metals are obtained by electrolytic reduction. ..

Everything that exists in our universe is made up of this tiny particle called atom. The computer you are working on is made up of atom..

E-waste What contributes to e-waste? Discarded electronic devices like televisions, personal computers, floppies, audio-video CDs, batteries, electric switches, telephones, air conditioners, cellphones, electronic toys, refrigerators, washing machines, dryers, kitchen utensils and eve..

The water flowing in a river is collected by constructing a high rise dam. This stored water is then allowed to fall from the top of the reservoir on to a water turbine located at the bottom of the dam. The fast moving water rotates the blades of the water turbine, which in turn rotates..

The rest of the metals occur in the combined form as compounds such as oxides, carbonates, sulphides, sulphates, silicates, chlorides, nitrates, phosphates etc. Copper and silver are two metals which occur in free as well as combined state as sulphide, oxide or halide ores. Metals at the toph..

The adrenal glands are present on top of the kidneys and appear cap-like on top of each kidney. Each adrenal gland has two layers - outer cortex and inner medulla. The adrenal cortex secretes hormones like the glucosteroids, mineralocorticoids and cortisones. Glucosteroids incr..

Question: Choanocytes are unique to 1. protozoa 2. porifera 3. mollusca 4. echinodermata Answer: ..

This is the decomposed mixture of excreta (dung) and urine of farm animals like cow, horse, goat and sheep along with leftover hay and fodder. They are readymade manures and contain nitrogen, phosphorus and potassium. Farmyard manure when collected in the field and stored in an exposed condition o..

Question: Inland fisheries refers to 1. culturing fish in freshwater 2. trapping and capturing fishes from sea coast 3. deep sea fisheries 4. extraction of oil from fishes Answer: ..

Question: Floods can be prevented by_______. 1. afforestation 2. cutting the forests 3. tilling the land 4. removing the top soil Answer: ..