An organic compound (A) has a general formula CaHzn. This compound has seven carbon atoms. When the compound is hydrogenated, it forms a compound (B) having two excess H atoms. a) Identify the compound (A), write its name. b) Identify the compound (B), write its name. c) Which out of (A) and (B) is a saturated hydrocarbon? d) Which of the following figures can be regarded as an Isomer of (B)?
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An organic compound (A) has a general formula CnH2n. This compound has 7 carbon atoms. When the compound is hydrogenated, it forms a compound (B) having two excess H atoms.
- The compound A is to be identified and its name is to be written.
- The compound B is to be identified and its name is to be written.
- Out of (A) and (B), the saturated hydrocarbon is to be identified.
- The figure that can be regarded as the isomer of (B) is to be identified.
a. The given compound (A) has a general formula CnH2n. Thus, it represents the general formula of an alkene.
Hence, A is an alkene.
Now, A has 7 carbon atoms (n = 7).
Thus, number of hydrogen atoms = 2n = 2×7 = 14
Therefore, compound A is C7H14.
Name of A- Heptene.
b. Now, hydrogenation is known as addition of H2 across a double bond resulting in formation of alkanes from alkenes.
Now, When the compound A is hydrogenated, it forms a compound (B) having two excess H atoms.
Thus compound B is heptane with chemical formula C7H16.
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