CBSE 10th Standard Science Subject Carbon and Its Compounds HOT Questions 2 Mark Questions With Solution 2021
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CBSE 10th Standard Science Subject Carbon and Its Compounds HOT Questions 2 Mark Questions With Solution 2021
10th Standard CBSE
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Reg.No. :
Science
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A, B, C are members of homologous series and their melting points are -183°C, -138°C, 130°C respectively. Among these
(i) Which member will have least number of carbon atoms?
(ii) Which member will have maximum number of carbon atoms?(a) -
A hydrocarbon compound A is active ingredient of wine and cough syrup. A on oxidation with acidified K2Cr2O7 forms compound B. Identify the compound A and B and write the chemical equations involved.
(a) -
Write an activity to show the acidic nature of ethanol. Give the chemical equation of the reaction taking place
(a) -
A compound 'X' has molecular formula C2H60 is saturated hydrocarbons and is a very good solvent. How can you convert it into unsaturated hydrocarbon? Identify X and show its conversion with the help of equation.
(a) -
Take about 20 mL of castor oil in a beaker. Add 30 mL of 20% sodium hydroxide solution. Heat the mixture with continuous stirring for a few minutes till the mixture thickens. Add 5-10 g of common salt to this. Stir the mixture well, allow it to cool, soaps is obtained.
(a) Why do we use common salt to make soap?
(b) What will happen if you will add the above made soap solutions to the following test tubes A, B, and C.
(c) Can we use potassium hydroxide instead of sodium hydroxide.(a)