Proceduformed. Take about 15 mL of vegetable oil in a beakerferis formed.Add small amount of sodium chloride to the reaction mixture for salting out of soap. Remove the paste of soap and addame filler namely sodium carbonate or sodium silicate to make the soap hard. Transfer it into a soap frame of desired shape and allow toet.Precautions :2-117 ge used when you are proHCI, (ii) Na, Co, and cids..CO.yl orange, (iii) Methylo1. Sodium hydroxide is corrosive, it should be handled with care.2 Mixture of vegetable oil and sodium hydroxide should be stirred thoroughly.3. The soap so prepared contains some unused sodium hydroxide and should not be used for washing your face.VIVA-VOCEQ. 1. What is soap?Q.5. What is lather?Ans. Soap is sodium or potassium salt of long chain fattyAns. The foam produced by soap in water is called lather.Q.6. How does soap work in soft water and in hard water?Q.2. What is oil or fat?Ans. Soap forms lather in soft water and produced a scum inhard water.Ans. Oils and fats are esters of glycerol with higher fattyQ.7. What is soft water?acids.Ans. Water in which soap forms lather easily.Q. 3. Name a fatty acid.Q.8. What is hard water?Ans. Stearic acid (C,,H3 COOH) is a fatty acid.Ans. The water in which contains calcium and magnesiumQ. 4. Give the general formula of soap.salts and produced a precipitate or scum with soap is called hardAns. RCOONa is the general formula of soap.water.zin.n?rength is called as stanmay be expressed eitheOrmality.is defined as the numb:in one litre of solutionis per litre of the substzEXPERIMENT NO. 6To prepare hydrogen gas and study the properties.Theory : Hydrogen is prepared in the laboratory by the action of dilute sulphuric acid on granulated zinc.Zn(g) +H SO, (aq) → ZnSO,(aq) +H,(g)Apparatus : Woulf's bottle, thistle funnel, delivery tube gas jars, glass discs and granulated zinc.Chemicals required: Granulated zinc, dilute sulphuric acid, matchstick.Procedure : Take a Woulfs bottle and put some pieces of granulated zinc in it. Cover the zinc pieces with water. Fit the Woulfe'sbottle with a thistle funnel and a delivery tube as shown in the figure. The other end of the delivery tube is diped under a behive shelf inthe solution which contar a trough containing water. A gas Jar filled with water is inverted over behive shelf. Conc. H, SO, is poured slowly through the thistle funnel.of the solution. A norm Sulphuric acid gets diluted and reacts with zinc evolving hydrogen. Hydrogen is collected by downward displacement of water.ins 40 grams of it dissolveCONC-SULPHURICHYDROGENP]. It is written as N.Nag!re of the substancess of the substance2f it dissolved per litreACIDDELIVERYTUBEGAS JAR​