Class name Subject Book title Chapter number Content Created at
Class VIII English It So Happend 8 education system in ancient India? 4. What was the role of guru in pupils’ lives? II • In Part I, you have read about the ancient education system ...
Class VIII English It So Happend 8 in the world. These have been recently declared heritage sites by the United Nations Educational, Scientific and Cultural Organization (UNESCO). TA...
Class VIII English It So Happend 8 governing a country Ancient Education System 71 India Reprint 2024-25 He would admit as many students as he liked and taught what his students were...
Class VIII English It So Happend 8 the other. Financial support came from rich merchants, wealthy parents and society. Besides gifts of buildings, the universities received gifts of ...
Class VIII English It So Happend 8 from the laid on connecting learning to the world outside the school. Today educationists recognise the role and importance of multilingual and tra...
Class XI Chemistry Chemistry Part II 3 reactions (9.66) are given below: (i) Addition of dihydrogen (iv) Addition of water Pt/Pd/Ni H Like alkanes and alkenes, alkynes are also HC≡CH+H 2...
Class XI Chemistry Chemistry Part II 3 ring are known as molecules polymerise to form benzene, which benzenoids and those not containing a is the starting molecule for the preparation of...
Class XI Chemistry Chemistry Part II 3 He gave the dynamic structural formula to benzene which forms the basis for its modern electronic structure. He described the discovery of benzene ...
Class XI Chemistry Chemistry Part II 3 6 indicates a high degree of unsaturation. This molecular formula did not account for its relationship to corresponding alkanes, alkenes and alkyne...
Class XI Chemistry Chemistry Part II 3 structures, A and B given by Kekulé are the main contributing structures. The hybrid structure is represented by inserting a circle or a dotted cir...
Class XI Chemistry Chemistry Part II 3 The six π electrons are thus delocalised and can move freely about the six carbon nuclei, instead of any two as shown in Fig.9.6(a)or(b).Thedelocal...
Class XI Chemistry Chemistry Part-I 6 liquid phase. In the same way, equilibrium x = 4.24(0.01 + x -0.2x) x2 = 0.0424 + 4.24x -0.848x between a solid and its saturated solution, 2 2+ – ...
Class XI Chemistry Chemistry Part II 3 is called sulphonation. It is carried out molecules and are usually colourless liquids by heating benzene with fuming sulphuric or solids with a ch...
Class XI Chemistry Chemistry Part II 3 be Protonated Nitronium chlorinated to hexachlorobenzene (C Cl ) 6 6 nitric acid ion It is interesting to note that in the process of generation of...
Class XI Chemistry Chemistry Part II 3 types of behaviour are observed. Either ortho and para products or meta product is predominantly formed. It has also been observed that this behavi...
Class XI Chemistry Chemistry Part II 3 Other examples of activating In this case, the overall electron density grou s are – H – H – HC CH – CH , on benzene ring decreases making further ...
Class XI Chemistry Chemistry Part II 3 and petroleum, which are the major sources of energy. Petrochemicals are the prominent starting materials used for the manufacture of a large numbe...
Class XI Chemistry Chemistry Part II 3 – 2H = CH – CH – CH – CH =2CH 2 | C2H 5 9.3 For the following compounds, write structural formulas and IUPAC names for all possible isomers having ...
Class XI Chemistry Chemistry Part II 3 yields 2-bromopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism. 9.17 Write d...
Class XI Chemistry Chemistry Part-I 4 UNIT 4 CHEMICAL BONDING AND MOLECULAR STRUCTURE Scientists are constantly discovering new compounds, orderly arranging the facts about them, trying...
Class XI Chemistry Chemistry Part-I 4 ts ha e been ut forward from time sim le o alent mole ules to time hese are ssel ewis a roa h alen e hell le tron air e ulsion heory alen e ond des...
Class XI Chemistry Chemistry Part-I 6 of mass of ice and water, as the rates of transfer of left. In some cases, it may not be even possible to detect these experimentally. molecules fr...
Class XI Chemistry Chemistry Part-I 4 tronegati e halogens and the highly ele tro ositi e al ali metals are se arated ositi ely harged ernel the nu leus lus the inner ele trons and the ...
Class XI Chemistry Chemistry Part-I 4 heme an be e lained as between the atoms. In the process each atom + – attains a stable outer octet of electrons. a → a + e e s1 e Lewis Symbols: I...
Class XI Chemistry Chemistry Part-I 4 the basis for the modern on e ts regarding ion formation he ewis dot stru tures an be written for by electron transfer and the formation of ionic o...