10th Class Chemistry Chapter 11 Easy Notes And Most Important Questions.....

Q1: What is meant by the term Catenation?

Give an example of a compound that displays catenation? Ans: “The self-linking property of carbon atoms through covalent bonds to form long straight or branched chains and rings of different sizes is called Catenation”.

Example: – CH₃―CH₂―CH₂―CH₂―CH₃

Q2: How coal is formed?

Ans: “Conversion of wood into coal is called carbonization”. Coal was formed by the decomposition of dead

plants buried under the earth’s crust some 500 millions ago. It is a very slow biochemical process. It takes place

in the absence of air under high pressure and high temperature.

Q3: What is importance of natural gas?

Ans: Importance of Natural Gas:-

(a) It is used as fuel in homes and industry.

(b) It is used as fuel in automobiles.

Q4: Justify that organic compounds are used as food?

Ans: The food we eat daily such as milk, eggs, meat etc.

Q5: How alkyl radicals are formed? Explain with examples.

Ans: An alkyl radical is formed by the removal of one hydrogen atom from an alkane

Example: – CH₃―CH₂― OR C₂H₅¯

Q6: What is the difference between n-propyl and isopropyl? Explain with structure.

Ans: n-propyl is formed by the removal of the removal of terminal H atom from either end of propane.

Isopropyl radical is formed by the removal of central H from propane.

Q7: Explain different radicals of butane?

Ans: There are two butanes:-

Q8: Define functional group with an example?

Ans: An atom or a group of atoms or a double or a triple bond whose presence gives characteristics properties to an organic compound is called a Functional Group.

Example: – CH₃―CH₂―OH

Q9: What is an ester group? Write down the formula of ethyl acetate.

Ans: Ester Group: – ―COO― OR ―C―O―

Formula of ethyl acetate: – CH₃―C―O―CH₂―CH₃

Q10: Write down the dot and cross formula of propane and n-butane?

Ans: H H H H H H H