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.
