#### Fundamentals of Organic Chemistry Book Back Questions

11th Standard

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 30
5 x 1 = 5
1. Select the molecule which has only one $\pi$ bond.

(a)

CH3– CH = CH – CH3

(b)

CH3– CH = CH – CHO

(c)

CH3– CH = CH – COOH

(d)

All of these

2. In the hydrocarbo $\overset { 7 }{ { CH }_{ 3 } } -\overset { 6 }{ { CH }_{ 2 } } -\overset { 5 }{ CH } =\overset { 4 }{ CH } -\overset { 3 }{ { CH }_{ 2 } } -\overset { 2 }{ CH } =\overset { 1 }{ CH }$ the state of hybridisation of carbon 1,2,3,4 and 7 are in the following sequence.

(a)

sp, sp, sp3, sp2, sp3

(b)

sp2, sp, sp3, sp2, sp3

(c)

sp, sp, sp2, sp, sp3

(d)

none of these

3. Which one of the following names does not fit a real name?

(a)

3 – Methyl –3–hexanone

(b)

4–Methyl –3– hexanone

(c)

3– Methyl –3– hexanol

(d)

2– Methyl cyclo hexanone

4. IUPAC name of ${ CH }_{ 3 }-\overset { \underset { | }{ H } }{ \underset { \overset { | }{ { C }_{ 2 }{ H }_{ 5 } } }{ C } } -\overset { \underset { | }{ { C }_{ 4 }{ H }_{ 9 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -{ CH }_{ 3 }$ is

(a)

3, 4, 4 – Trimethylheptane

(b)

2 – Ethyl –3, 3– dimethyl heptane

(c)

3, 4, 4 – Trimethyloctane

(d)

2 – Butyl -2 –methyl – 3 – ethyl-butane

5. The IUPAC name of the compound  is

(a)

3 – Ethyl -2– hexene

(b)

3 – Propyl -3– hexene

(c)

4 – Ethyl – 4 – hexene

(d)

3 – Propyl -2-hexene

6. 3 x 2 = 6
7. Give the general characteristics of organic compounds?

8. Write the molecular formula of the first six members of homologous series of nitro alkanes.

9. Describe the reactions involved in the detection of nitrogen in an organic compound by Lassaigne method.

10. 3 x 3 = 9
11. Write all the possible isomers of molecular formula C4H10O and identify the isomerisms found in them.

12. 0.40 g of an iodo-substituted organic compound gave 0.235 g of AgI by carius method. Calculate the percentage of iodine in the compound. (Ag = 108, I = 127) (Ans = 31.75)

13. 0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg2P2O7 by the analysis. Calculate the percentage of P in the compound.

14. 2 x 5 = 10
15. 0.26g of an organic compound gave 0.039 g of water and 0.245 g of carbon dioxide on combustion. Calculate the percentage of C & H.

16. 0.185 g of an organic compound when treated with Conc. HNO3 and silver nitrate gave 0.320 g of silver bromide. Calculate the % of bromine in the compound. (Ag =108, Br = 80) Ans: 73.6