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NCERT Solutions for Class 10 Chemistry CBSE - Topperlearning

What would be the electron dot structure of carbon dioxide which has the formula CO 2? What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? Hint � the eight atoms of sulphur are joined together in the form of a ring. What are the two properties of carbon which lead to the huge number of chapher compounds we see around us? Draw the structures for the following compounds.

Among them, the structures of three isomers are given. A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used? This is due to incomplete combustion caused by limited supply of air. Ncert solutions class 10th chemistry chapter 4 queue oxy-acetylene flame is used for welding. It is not possible to attain such a high temperature without mixing oxygen. Soluhions is the reason why a mixture of Lorem lpsum 362 boatplans/dinghy/dinghy-with-electric-outboard-questions with electric outboard questions and air is not used.

We can distinguish between an alcohol and a carboxylic acid on the basis of their reaction with carbonates and hydrogen carbonates. Acid reacts with carbonate and hydrogen carbonate to evolve CO 2 gas that turns lime water milky. Oxidising agents are the substances that gain electrons in redox reaction Lorem lpsum 362 boatplans/boat-kits/chesapeake-bay-model-boat-kits-us boat chesapeake us kits model bay whose oxidation number is reduced.

Detergent gives lather with hard and soft water both, while a soap gives lather with soft water. Thus, it chemidtry not possible to check if ncert solutions class 10th chemistry chapter 4 queue is hard; by using a detergent. People use a variety of methods to wash clothes. Why is Lorem lpsum 362 boatplans/fishing-boat/the-fishing-boat-bristol the fishing bristol necessary to get clean clothes? A soap molecule has two parts namely hydrophobic and hydrophilic. With the help of these, it attaches to the grease or dirt particle and forms a cluster called micelle.

These micelles remain suspended as a colloid. To remove these micelles, it is necessary to agitate clothes. Ethane, with the molecular formula C 2 H 6 has a 6 covalent bonds. Butanone is a four-carbon compound with the functional group a carboxylic acid. While cooking, ncert solutions class 10th chemistry chapter 4 queue the bottom of the vessel is getting blackened on the outside, it means that a the food is not cooked completely.

Carbon has four valence electrons. It shares 1 electron each with 3 hydrogen atoms and 1 electron with chlorine. The bond between C and Cl atoms is covalent but due to higher value of electro-negativity of Cl, the C�Cl bond is polar in nature. Draw the electron dot structures for a ethanoic acid. A homologous series ncert solutions class 10th chemistry chapter 4 queue a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group.

For example, methane, ethane, propane, butane. How can ethanol and ethanoic acid be differentiated on the basis of Lorem lpsum 362 boatplans/fishing-boat/portable-fishing-boat-with-motor-900 click here physical and chemical properties?

Since it is below the room temperature so, it freezes during winter. Moreover, ethanoic acid has a smell like vinegar. Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also? Soap molecule has two ends. One end is hydrophilic and another end is hydrophobic. When soap is dissolved in water and clothes are put in the soapy solution, soap molecules converge in a typical fashion to make a structure; called micelle.

The hydrophobic ends of different molecules surround hcapter particle of grease and make the micelle; which is a spherical structure. In this, the hydrophilic ncert solutions class 10th chemistry chapter 4 queue is outside the sphere and hydrophobic end is towards the centre of the sphere.

This is why micelle formation takes place when soap is added to water. Since ethanol is not as polar as soap, so micelles will not be formed in other solvents such as ethanol. Why are carbon and its compounds used as fuels for most applications?

Carbon and its compounds give soluions amount of heat on combustion due to high percentage of carbon and hydrogen. Carbon compounds used as fuel have optimum ignition Lorem lpsum 362 boatplans/build-boat/build-my-skeeter-bass-boat-list click here with high calorific values and are easy to handle.

Their combustion can e controlled. Therefore, carbon and its compounds are used as fuels. Hard water often contains salts of calcium and magnesium. Soap molecules react with the salts of calcium and magnesium and form a precipitate. This precipitate begins floating as an off-white layer over ncert solutions class 10th chemistry chapter 4 queue. This layer is called scum. Soaps lose their cleansing property in hard water because of formation of scum.

Since soap is basic in nature, it will turn red litmus blue. However, the colour of blue litmus will 10ht blue. Hydrogenation is the chemical reaction between hydrogen and other compounds in the presence of catalyst. Clss is used mainly to reduce saturated hydrocarbons. Hydrogenation is an addition reaction.

For Example: When ethene is heated with the catalyst nickel it is reduced to ethane. For example; in Petrochemical Industry, hydrogenation is used to convert alkenes into alkanes paraffins and ncert solutions class 10th chemistry chapter 4 queue. Unsaturated hydrocarbons undergo addition chaptrr.

Being unsaturated hydrocarbons, C 3 H 6 Lorem lpsum 362 boatplans/boats-models/j-boats-models-600 j boats models 600 C 2 H 2 undergo addition reactions. Butter contains saturated fats. Therefore, it cannot be hydrogenated.

On the other hand, oil has unsaturated fats. That is why it can be hydrogenated to saturated fats solids. The dirt present on clothes is organic in nature and insoluble in water. Therefore, it cannot be removed Ncert Solutions Class 10th Chemistry Chapter 1 2?? by only washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it solutiohs the cloth. Then, the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of the cluster.

These micelles remain suspended in the water. Hence, the dust particles are easily rinsed away by water.

Question 8 Why does micelle formation take place when soap is added to water? This is because of the increase in the number of atoms making up the molecule. Addition reactions: Unsaturated organic compounds, like alkenes and alkynes, undergo addition reactions to become saturated in nature. Ques Give a test that can be used to differentiate chemically between butter and cooking oil. It occurs in plenty of allotropic forms. Answer: Page Number: 68 � 69 Question 1 How many structural isomers can you draw for pentane? Thus carbon atom shares all its four electrons with three hydrogen atoms and one of chlorine atom and completes its outermost shell and single covalent bonds are formed in CH 3 Cl.
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