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Assuming that it undergoes no collision with other molecules, how high will it be before coming to the rest? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh How many molecules of water of crystallisation (per formula unit) are present in: (a) copper sulphate crystals? (b) washing soda? (c) gypsum? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh Write the name and formula of one salt each which contains : (a) two molecules of water of crystallisation (b) five molecules of water of crystallisation 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh When chlorine and sodium hydroxide being produced during the electrolysis of brine are allowed to mix, a new chemical is formed. Name this chemical and write its uses. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh A person found that the cake prepared by him is hard and small in size. Which ingredient has he forgotten to add that would have caused the cake to rise and become light? Explain your answer. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh A salt X when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh A white powdery substance having strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh Consider the following salts : Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH4)2SO4 Which of these salts will give : (a) acidic solutions? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh A compound X which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. (a) Identify the compound X (b) Write the chemical equation for its preparation. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh Give one example each of a salt which gives an aqueous solution having: (a) pH less than 7 (b) pH equal to 7 (c) pH more than 7 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh Consider the following substances : NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2 (a) Which two substances combine to form bleaching powder? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh The metal salt A is blue in colour. When salt A is heated strongly over a burner, then a substance B is eliminated and a white powder C is left behind. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn: (a) blue litmus red? (b) red litmus blue? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh What is salt? Give the names and formulae of any two salts. Also, name the acids and bases from which these salts may be obtained. (b) What is meant by ‘a family of salts’? Explain with examples. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh What is plaster of Paris? Write the chemical formula of plaster of Paris. (b) How is plaster of Paris prepared? Write chemical equation of the reaction involved. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh What is bleaching powder? How is bleaching powder prepared? Write chemical equation of the reaction involved in the preparation of bleaching powder. (b) What happens when bleaching powder reacts with dilute sulphuric acid? 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh Describe how washing soda is produced starting from sodium chloride (common salt). Write equations of all the reactions involved. (b) State whether an aqueous solution of washing soda is acidic or alkaline? Give reason for your answer. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved. 3 years ago Deepak Rock class 10 acids bases salts lakhmir singh Page 1 / 5 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? 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