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CBSE - Class 10 Science Carbon and its Compounds Worksheet

1.
Which of the following hydrocarbons undergo addition reactions: $C_2H_6$, $C_3H_8$, $C_3H_6$, $C_2H_2$ and $CH_4$.
2.
Draw the electron dot structures for (b) $H_2S$.
3.
What is an homologous series? Explain with an example.
4.
How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?
5.
Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?
6.
While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
a. the food is not cooked completely. b. the fuel is not burning completely. c. the fuel is wet. d. the fuel is burning completely.
7.
Why are carbon and its compounds used as fuels for most applications?
8.
Butanone is a four-carbon compound with the functional group
a. carboxylic acid. b. aldehyde. c. ketone. d. alcohol.
9.
Explain the nature of the covalent bond using the bond formation in $CH_3Cl$.
10.

Which statement correctly explains why ethene (C₂H₄) undergoes an addition reaction but ethane (C₂H₆) generally does not?

a.

Ethene contains an ionic bond

 b.

Ethene contains a carbon-carbon double bond that can open during addition

 c.

Ethane contains oxygen atoms

 d.

Ethane has fewer carbon atoms than ethene
11.
Draw the electron dot structures for (c) propanone.
12.
Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons.
13.
Ethane, with the molecular formula $C_2H_6$ has
a. 6 covalent bonds. b. 7 covalent bonds. c. 8 covalent bonds. d. 9 covalent bonds.
14.
Draw the electron dot structures for (d) $F_2$.
15.
Explain the formation of scum when hard water is treated with soap.
16.
What change will you observe if you test soap with litmus paper (red and blue)?
17.
Explain the mechanism of the cleaning action of soaps.
18.
What is hydrogenation? What is its industrial application?
19.
Draw the electron dot structures for (a) ethanoic acid.

Worksheet Answers

6.
8.
10.
Option B

Solution:

Ethene contains a C=C double bond. The weaker π bond can break, allowing atoms such as hydrogen or halogens to add across the double bond. Ethane contains only single C–C bonds and therefore does not normally undergo addition reactions.

13.
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