N.C.E.R.T. Simplified

Q. Which non-metal exists in liquid state? A. Bromine Q. What is a covalent bond? A. A covalent bond is a bond formed by sharing of electrons between two atoms to get a stable electron arrangement. e.g. O₂, H₂O, C₂H₄ etc. Q. What type of bonds are present in hydrogen chloride and oxygen? A. Covalent bonds   Q. What is an ionic bond? A. An ionic bond is a bond formed by the transfer of electrons from one atom to another. e.g. NaCl, FeSO₄, MgCl₂ etc. Q. a) What are noble gases? What is the characteristic of the electronic configuration of noble gases? b) What is the cause of chemical bonding (/combination) of atoms of elements? A. a)   The elements present in the group 18 of the periodic table are known as noble gases. These are the elements which are unreactive and do not react with other elements to form compounds.  The characteristic of electronic configuration of noble gases is that their octet (/duplet) is completely filled i.e. they have 8 electrons in t

Q. What are social divisions of USA? A.  The social divisions in the USA are the differences between the Blacks and Whites. In USA, the Blacks tend to be poor, homeless and discriminated against. Q. Define the term homogenous society? A. A homogenous society is a society that has similar kinds of people, especially where there are no ethnic differences. Q. Does every social difference lead to social division? Explain. A.  ・No, social divisions are created when some social difference overlaps with other differences e.g. Dalits in our country tend t be poor and landless, and often face discrimination and injustice. ・A social division is created in a situation when one kind of social difference becomes more important than the other, and the people start feeling that they belong to different communities. ・Every social difference does not lead to social division. Social differences divide people from one another but they also unite very different people. People belonging to