In Text QuestionsPage No: 401. Give an example of a metal which(i) is a liquid at room temperature.► Mercury(ii) can be easily cut with a knife.► Sodium(iii) is the best conducto… Read More

ACID, BASES AND SALTSIntext QuestionsPage No: 181. You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic… Read More

CHEMICAL REACTIONS AND EQUATIONINTEXT QUESTIONS1. Why should a magnesium ribbon be cleaned before burning in air?Sol. Magnesium ribbon reacts with CO2 present in air to form a protective lay… Read More

Elements are the building blocks of all substances. There are 118 elements known at present, out of which 98 are naturally occurring. In order to study the properties of all these elements s… Read More

Carbon is considered as the third most important element, aftre oxygen and hydrogen, for the existence of life on earth. The name carbon is derived from a latin word 'Carbo' which means coal… Read More

About 118 elements are known at present. On the basis of their properties the elements can be divided into two main groups, i.e. metals and non-metal. Apart from these some elements show pro… Read More

All the chemical compounds can be classified on the bases of their chemical properties as acids, bases and salts.ACIDSAcids are those chemical substances which have sour taste and change blu… Read More

CHEMICAL REACTIONA chemical reaction is a change in which one or more substance or reactants react to form a new substance with entirely different properties.The reacting things are known as… Read More

The working together of various organs of a living being in a systematic, controlled and efficient way to produce proper response to various stimuli known as coordination.Animals have the ne… Read More

Reproduction is a characteristic feature of all living organisms. It involves the creation of organelles, cells, or organisms of the same kind.Reproduction is necessary for the survival of a… Read More

CHEMICAL EQUATION A chemical equation is the symbolic representation of chemical reaction. Symbols and formulae of the reactants and products are used for the same.e.g. the reaction of burni… Read More

Electricity is an essential part of life in today's world. It is a controllable and convenient form of energy. Electricity is being used in almost every sector of modern society like househo… Read More

The human eye is one of the most valuable and sensitive organs in human body. It consist of many parts, we will come to know about them in the coming blogs. In this we will study about Corne… Read More

Excretion is the biological process by which an organism removes harmfull metabolic wastes from the body. The mode of excretion is completely different from in unicellular organism and multi… Read More

Transportation is the life process in which a substance absorbed in one part of the body of an organism is carried to other part of its body through various means.TRANSPORTATION IN HUMAN BEI… Read More

For a living being it is necessary to perform several functions for proper body functioning. These basic functions are called Life Processes. The basic life processes wich are common to all… Read More

Respiration is the process by which the food taken through gets oxidised to release energy for performing various functions.RESPIRATIONRespiration is defined as the process of biochemical ox… Read More

In this blog we will study about Retina.RETINAThe retina is the third and inner coat of the eye which is a light-sensitive layer of tissue. The optics of the eye create an image of… Read More

In this blog we will study about ciliary muscles.CILIARY MUSCLESThey hold the lens in position and help in modifying the curvature of the lens.StructureThe ciliary muscles developed from&nbs&hell…Read More

In this blog we will study about PUPIL.The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina. I… Read More

In this post we will study about IRIS.It is a dark muscular diaphragm between the cornea and the lens. It controls the size of pupil. It is the colour of the iris that we call the colour of… Read More

In this blog we will study about the Crystalline Lens present in our eyes.The eye lens is a convex lens made of a transparent, soft and flexible material like a jelly made of proteins. It is… Read More