Q1 of 33 Page 224

Write down the possible isomers and give their IUPAC names using the formula C4H10.

Possible isomers of C4H10 are:


i. The IUPAC name of isomer A is butane.


ii. The IUPAC name of isomer B is iso-butane.


Note: Isomers are the two or more compounds having same molecular formula but different chemical structures.


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Acetic acid is heated with Na2CO3 in a test tube. A colourless and odourless gas (X) is evolved. The gas turns lime water milky. Identify X.

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Assertion: Denaturation of ethyl alcohol makes it unfit for drinking purpose.

Reason: Denaturation of ethyl alcohol is carried out by pyridine.


Check whether the reason is correct for assertion.


 2

Diamond is the hardest allotrope of Carbon. Give reason for its hardness.

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An organic compound (A) is widely used as a preservative in pickle and has a molecular formula C2H4O2. This compound reacts with ethanol to form a sweet smelling compound

(B).


(i) Identify the compounds A and B.


(ii) Name the process and write the corresponding chemical equation.