std 6 sanskrut ch 6 swadhyay

Basic question on formation OF quadratic equation || 6 std. graph OF quadratic polynomial

Total number of the following ethers that can be prepared by Williamson synthesis is : C_(6)H_(5)CH_(2)OC_(6)H_(5),C_(6)H_(5)OC_(6)H_(5),(CH_(3))_(3)COCH_(2)CH_(3),(CH_(3))_(3)COC(CH_(3))_(3),C_(6)H_(5)OCH_(2)CH_(3),CH_(3)OCH_(2)CH_(3)

Which of the following sequence of reaction (reagents) can be used for conversion of C_(6)H_(5)CH_(2)CH_(3) into C_(6)H_(5)CH=CH_(2) ?

(a) Expand STDS (b) Cite any two examples for STDs. (c) Suggest any two methods for the prevention of STDs.

Give the main products of the reactions : (a) C_(6)H_(6) underset(H_(2)SO_(4))overset(HNO_(3))to (b) C_(6)H_(5)CH_(3) overset(CrO_(2)Cl_(2))to (c) C_(6)H_(5)CH_(2)CH_(2)CH_(3)overset("Alk." KMNO_(4))to (d) C_(6)H_(6)+ Cl_(2) overset ("sunlight")to (e) C_(6)H_(6)+ CH_(3)COOCl overset("Anhyd." AlCl_(3))to