Combustion Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called... View Article
d) Charcoal When LPG, or dry grass, or camphor are burnt, they vaporize, and thus a flame is generated. But, in the case of Charcoal, no flame... View Article
Tuberculosis is an air-borne disease. A patient who is affected with this disease may transfer the bacteria which are known as Mycobacterium... View Article
Sublimation is the transition of an object from solid-state to vapour state without passing through the intermediate liquid state. Sublimation... View Article
Frog’s eggs are without any external covering or shell, but a layer of jelly hold the eggs together, thus providing them protection. This... View Article
c)Typhoid Typhoid is an infectious bacterial disease that mainly spreads through contaminated food or water. It can also spread due to poor... View Article
(a) Linnaeus The book 'Systema Naturae' was written by Carolus Linnaeus in 1735. The book marked the beginning of zoological nomenclature.... View Article
The green leaves have chlorophyll and moisture will be present in them. This moisture does not allow them to catch fire easily when a heap of... View Article
(a) collenchyma They are known to render mechanical support to plants by protecting the delicate inner structure of plants They have thick... View Article
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its Calorific value. The heat value of a fuel is the... View Article
b) Cerebellum Cerebellum serves to coordinate the voluntary movements of skeletal muscles as well as posture, balance and equilibrium. The... View Article
Farming without the use of chemicals as fertilizers, herbicides and pesticides is known as organic farming. Organic farming can be defined as... View Article
a) Ribosome Ribosome is a circular particle attached to the double membrane Endoplasmic reticulum. All the others are double membrane organelles.... View Article
Any substance which upon combustion produces a usable amount of energy is known as fuel. Fuels which are found in their solid state at room... View Article
b) Glass A substance that does not react with oxygen in air and does not produce heat is known as a non-combustible substance. Camphor, straw and... View Article
Zinc>Iron>Copper (Order of reactivity) As we can see that zinc is the most reactive metal and copper is the least reactive metal amongst... View Article
b) Hugs AIDS or Acquired Immune Deficiency Syndrome is a disease caused by the HIV. In this condition, a person’s immune system becomes... View Article
(a) replace Replace is not a way to conserve water. At our individual level, we should consciously save water and not to waste it. Reduce,... View Article
