Day 105: CBSE Class 10 Science
5 questions. Try each one first, then open its answer.
Question 1
Carbon and its Compounds. Asked once: 2025 (same type asked 2 times)
34 (a)Name an alcohol and a carboxylic acid having two carbon atoms in their structures. Draw their structures and state how this alcohol can be converted into a carboxylic acid. What happens when these two compounds react in the presence of an acid ? Write chemical equations for the reactions involved in the two cases mentioned above.Question 2
Carbon and its Compounds. Asked once: 2025 (same type asked 2 times)
34 (b)(i) Differentiate between saturated and unsaturated hydrocarbons by giving one example each, with a structural formula. (ii) Write the method of converting an unsaturated hydrocarbon into a saturated hydrocarbon. Name the industry where this reaction is commonly used. (iii) Write the name and structure of a hydrocarbon having double bond and four carbon atoms in its one molecule.Question 3
Carbon and its Compounds. Asked once: 2025 (same type asked 2 times)
34 (a)(a) What is meant by the term homologous series of carbon compounds ? Write molecular formula of any two consecutive members of homologous series of ketones. (b) Write chemical equation of the reactions of ethanoic acid with (i) Sodium hydroxide and (ii) Ethanol (in the presence of an acid); giving the name of the products in each case. (c) Draw the structure of the molecule of benzene.Question 4
Chemical Reactions and Equations. Asked once: 2025 (same type asked 2 times)
27 (b)Why are decomposition reactions called the opposite of combination reactions ? Write one chemical equation each for these two types of reactions mentioning the name of the reactant(s) and the product(s) involved in the reactions.Question 5
Control and Coordination. Asked once: 2023 (same type asked 2 times)
22Write the name and function of parts (i) and (ii) in the diagram of a neuron given below.