Class name Subject Book title Chapter number Content Created at
Class X Science Science 3 and not with zinc because (a) zinc is costlier than tin. (b) zinc has a higher melting point than tin. (c) zinc is more reactive than tin. (d) zinc...
Class X Science Science 3 the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The ba...
Class X Science Science 4 CHAPTER 4 Carbon and its Compounds n the last Chapter, we came to know many compounds of importance I to us. In this Chapter we will study about so...
Class X Science Science 4 the properties of ionic compounds. We saw that ionic compounds have high melting and boiling points and conduct electricity in solution or in the m...
Class X Science Science 4 4– (i) ItcouldgainfourelectronsformingC anion.Butitwouldbedifficult for the nucleus with six protons to hold on to ten electrons, that is, four ext...
Class X Science Science 4 . Can you draw the electron dot structure for this molecule? Note that only the valence shell electrons need to be depicted. In the case of oxygen,...
Class X Science Science 4 you know, has a valency of 1. Carbon is tetravalent because it has four valence electrons. In order to achieve noble gas configuration, carbon shar...
Class X Science Science 4 Chapter. Diamonds can be synthesised by subjecting pure carbon to very high pressure and temperature. These synthetic diamonds are small but are ot...
Class X Science Science 4 have long chains of carbon, branched chains of carbon or even carbon atoms arranged in rings. In addition, carbon atoms may be linked by single, do...
Class X Science Science 4 could only be formed within a living system. That is, r o it was postulated that a ‘vital force’ was necessary for their synthesis. Friedrich Wöhle...
Class X Science Science 4 between the Step 3 two carbons (Step 3). Carbon and its Compounds 63 Reprint 2026-27 The electron dot structure for ethene is given in Fig. 4.7. Ye...
Class X Science Science 4 molecule Can you draw the electron dot structure for cyclohexane? Straight chain,branchedchainandcycliccarboncompounds,allmaybesaturated orunsatura...
Class X Science Science 4 2 O5, C H3OH7and C H O4 a9e all very similar. Hence, such a series of compounds in which the same functional group substitutes for hydrogen in a ca...
Class X Science Science 4 C H OH and C H OH, and (c) C H OH 3 2 5 2 5 3 7 3 7 and C 4 9H. ■ Is there any similarity in these three? ■ Arrange these alcohols in the order of ...
Class X Science Science 4 be called propyne. Carbon and its Compounds 67 Reprint 2026-27 Table 4.4 Nomenclature of organic compounds Class of Prefix/Suffix Example compounds...
Class X Science Science 4 in the first Chapter. Activity 4.3 Activity 4.4 CAUTION: This Activity needs the teacher’s assistance. ■ Light a bunsen burner and ■ Take some carb...
Class X Science Science 4 charcoal in an ‘angithi’ sometimes just glows red and n givesoutheatwithoutaflame.Thisisbecauseaflameisonlyproducedwhengaseous K substances burn. W...
Class X Science Science 4 a test tube and warm it the first Chapter. Carbon gently in a water bath. compounds can be easily ■ Add a 5% solution of alkaline potassium permang...
Class X Science Science 4 O N S 1. Why is the conversion of ethanol to ethanoic acid an oxidation reaction? 2. A mixture of oxygen and ethyne is burnt for welding. Can you t...
Class X Science Science 4 excess concentrated sulphuric acid results in the dehydration of ethanol to give ethene – Hot Conc. CH −3CH OH 2 H SO →CH = 2H + H O2 2 2 4 The...
Class X Science Science 4 Activity 4.7 acids. 5-8% solution of acetic acid in water is n Compare the pH of dilute acetic acid called vinegar and is used widely as a preserva...
Class X Science Science 4 acid. Carbon and its Compounds 73 Reprint 2026-27 NaOH CH C3OC H 2 5 C2H5OH+CH CO3Na (ii) Reaction with a base: Like mineral acids, ethanoic acid r...
Class X Science Science 4 see the oil and water layers separately in both the test tubes immediately after you stop shaking them? ■ Leave the test tubes undisturbed for some...
Class X Science Science 4 Soap in the form of a micelle is able to clean, since the oily dirt will be collected in the centre of the micelle. The micelles stay in solution a...
Class X Science Science 4 to use a larger amount of soap. This problem is overcome by using another class of compounds called detergents as cleansing agents. Detergents are ...