CHEMISTRY- CARBON

Assignment

Lesson Carbon

Q1Write the next higher homologue of the following

i)                   C₃H₆

ii)                 C₅H₈

iii)               C₄H₈

iv)               C₆H₁₀

Q2) Name the functional group present in propanone CH₃COCH₃

Q3) Give reasons for the following

i)                   Unsaturated hydrocarbons show addition reactions but not saturated hydrocarbons

ii)                 Carbon forms only covalent bonds

Q4) Draw electron dot structure of

i)                   C₂H₄

ii)                 C₂H₅OH

 Q5) Complete the following reactions starting the main products formed in each

i)                   CH₃ – CH = CH₂ + H₂ →

ii)                 C₂H₅OH + Na →

iii)               CH₃COOH + Na₂CO₃ →

Q6)

a)     On dropping a small piece of sodium in an organic compound “A” with molecular formula C₂H₆O in a test tube, a brisk effervescense is observed. On bringing a burning splinter, the gas evolved burns with a pop sound. Indentify “A” and write the chemical equation

b)     What will happen when you heat the organic compound “A” at 443K with excess of concentrated sulphuric acid

Q7)  What is meant by “The hydrogenation of vegetable oils”? Write the chemical reactions involved in the process. State the differences between oils and fats.

Q8)  Name the oxidizing agent used for the conversion of ethanol to Ethanoic acid. Distinguish between ethanol and Ethanoic acid on the basis of

i)                   Litmus test

ii)                 Reaction with sodium hydrogen carbonate

Q9)  What are hydrocarbons? Write the names and general formula of

i)                   Saturated hydrocarbons

ii)                 Unsaturated hydrocarbons

And draw the structure of one hydrocarbon of each type. How can an unsaturated hydrocarbon be made saturated

Q10) What are detergents chemically? List two merits and two demerits of using detergents for cleansing. State the reason for the suitability of detergents for washing, even in the case of water having calcium and magnesium ions

Q11)

i)                   Write chemical name and formula of vinegar?

ii)                 Describe with a chemical equation what happens when sodium reacts with ethanol

Q12) Why do alkanes burn with blue flame?

Q13)

i)                   Write one advantage and disadvantage of using ethanol

ii)                 State the role of ethanol in the formation of ester. Explain it with the help of chemical equation

iii)               Write the name of the products obtained on burning ethanol in air. Write the chemical equation too.

Q14) Write the name and general formula of a chain of hydrocarbons in which an addition reaction with hydrocarbon can take place. Stating the essential conditions required for an addition reaction to occur, write the chemical equation giving the name of the reactant and the product of such a reaction

Q15) Give the formula and name of the alkane which contains four carbon atoms in each molecule.

Q16) Explain why cannot we have isomers of first three members of alkane family

Q17) An organic compound ‘P’ is a constituent of wine. ‘P’ on reacting with acidified K₂Cr₂O₇ forms another compound ‘Q’. When a piece of sodium is added to ‘Q’ a gas ‘R’ evolves which burns with a pop sound. Identify P, Q, and R and write the chemical equation for the reactions involved    

Q18) Carbon, group (14) element in the periodic table, is known to form compounds with many elements. Write an example of a compound formed with

i)                   Chlorine (group 17 of periodic table )

ii)                 Oxygen  (group 16 of periodic table)

Q19) Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons  

Q20) Unsaturated hydrocarbons contain multiple bonds between the two C- atoms and show addition reaction. Give the test to distinguish ethane from ethene.