Question 12. State the chemical name of Plaster of Paris. (ii) What will happen in the above observation made by you after ten minutes ? Since CO2 is not a supporter of combustion, the burning splinter will be extinguished. (a) What is universal indicator? (a) Identify the most acidic and most basic solutions. 5.Bring a burning matchstick near the gas jar and record your observations. Conclusion: Metal carbonates react with dilute acids to liberate carbon dioxide. Free PDF download of Important Questions with solutions for CBSE Class 10 Science Chapter 2 - Acids, Bases and Salts prepared by expert Science teachers from latest edition of CBSE(NCERT) books. (iii) When an acid reacts with a metal oxide. CH3CH2OH + 2(O) ————–> CH3COOH +H2O 4. (b) What could be the product Y ? NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Materials Required: CuS04.5H20 (Blue vitriol), boiling tube, burner, cork, delivery tube, test tube, clamp stand. Answer. (b) You are given three solutions A, B and C with pH values 2, 10 and 13 respectively. Solution E – Violet. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 10.. It shows gas liberated is hydrogen. 12. (a) A metal compound ‘X’ reacts with dil. Online Practice. Limestone, chalk, marble are different forms of calcium carbonate. 19. You want to study a decomposition reaction by taking ferrous sulphate crystals in a boiling tube. Fit it with cork and delivery tube bent at two right angles which dips into a test tube. Write the name of the powder. Answer: (a) Five solutions A, B, C, D and E when tested with universal indicator showed pW as 4, 1, 11,7 and 9 respectively. (a) Alkali, e.g. SURVEY . Which of the following would change the colour of this pH paper to greenish-blue? Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of a saponification reaction. (b) Write chemical names and formula of plaster of paris and gypsum. Acids Bases and Salts important question for Class 10 Science PDF will help you in scoring more marks.. It neutralizes excess of acid and gives relief from pain caused by hyperacidity. A chemical is said to be basic if it releases OH – ions in its aqueous solutions. (ii) Na2CO3 . 41. HCl gives dark red colour with pH paper whereasCH3COOH gives orange colour (b) Rock salt is the common name for the mineral “halite”. Sodium hydrogencarbonate gives CO2 which makes cake soft and fluffy. Write one of its uses. All the MCQs are taken from NCERT Textbooks issued for session 2020-2021. Blue vitriol White Answer. List two physical and two chemical properties which he must observe and note in his record book. (ii) Explain why aqueous solution of an acid conducts electricity. Solution-C (Strongly acidic); They neutralize the acid formed in mouth which causes tooth decay. Copies of these textbooks may be downloaded and used as textbooks or … Answer. Write a chemical equation to show the reaction between Plaster of Paris and water. Answer. (ii)The process is called dilution. Therefore water is added to acid very slowly with cooling. Pass the two gases separately through bromine dissolved in carbon tetrachloride taken in two test tubes. Write which solution has more hydrogen ion concentration among the three and state the nature ‘acidic or basic’ of each solution. 29. Write the chemical reaction taking place when the powder is heated during baking. It has a pH value of 9. Get shields, trophies, certificates and scores. Answer: Giving an activity illustrate how these are inter convertible. Question from very important topics are covered by NCERT Exemplar Class 11.You also get idea about the type of questions and method to answer in your Class 11th … Question 23. Solving the Acids, Bases and Salts Multiple Choice Questions of Class 10 Science Chapter 2 MCQ can be of extreme help as you will be aware of all the concepts.