N.C.E.R.T. Simplified

Ch.3 Metals And Non-metals Extra Questions Ch.8 Periodic Classifications Extra Questions

Ch.1 Power Sharing Extra Questions Ch. 2 Federalism Extra Questions Ch.3 Democracy And Diversity Extra Questions Ch. 4 Gender, Religion and Caste Ch. 6 Political Parties Extra Questions Ch. 7 Outcomes of Democracy Ch. 8 Challenges to Democracy

Q. Write 3 features of Mendeleev's periodic table. A. ・Elements are arranged according to their increasing atomic masses. ・There are 6 periods (horizontal rows) and 8 groups (vertical columns). ・Periods 4, 5 and 6 are divided into 2 halves. Q. Which physical and chemical properties of the elements were used by Mendeleev in creating his periodic table? List two observations which posed a challenge to Mendeleev's periodic law. A.  Physical property used by Mendeleev was the atomic masses of elements and the chemical property used by him was the similar formulae of their oxides and hydrides. 2 challenging observations: i) The position of isotopes: Isotopes are the atoms of same elements with different atomic masses and hence would be provided with different spaces in Mendeleev's periodic table. ii) The position of hydrogen: Hydrogen resembles both alkali metals as well as halogens but it was placed with halogens in this table. Q. How and why does the atomic si

Q. Why is power sharing necessary? A.  Power sharing is necessary because: ・It helps to reduce the possibility of conflict between social groups. ・It ensures the stability of political order and prevents violence. ・It prevents majoritarianism and thus protects the minorities of a country. Hence it is necessary for the unity of a country. ・Power sharing is the very spirit of democracy. A democratic rule involves sharing power with those affected by its exercise, and who have to live with its effects. ・   People have the right to be consulted on how they are to be governed.  A legitimate government is one where citizens, through participation, acquire a stake in the system. Q. Give an account of the ethnic composition of Belgium and Sri Lanka. A. Ethnic composition of Belgium: ・Belgium has a population of a little over one crore.  ・ Of the country's total population, 59% lives in the Flemish region and speaks the Dutch language. ・  Another 40% lives in the Wall