std 9 gujarati ch.14 vadi parna vahala swadhyay solution || dhoran 9 gujarati chasoluti4 swadhyay solution || ધોરણ 9 ગુજરાતી પાઠ 14 વાડી પરનાં વહાલા સ્વાધ્યાય સોલ્યુશન || std 9 gujarat board || std 9 gujarati

K_(f) of 1,4-"dioxane is" 4.9mol^(-1) for 1000g .The depression in freezing point for a 0.001m solution in dioxane is

The solution of the system of equations whose Augmented matrix is [[1,2,3,6],[2,4,1,7],[3,2,9,14]] is

The solution of the system of equations whose augmented matrix is [[1,2,3,6],[2,4,1,7],[3,2,9,14]] is

The dissociation of weak electrolyte (a weak base or weak acid) id expressed in terms of Ostwald dilution law. An acid is a substance which furnishes a proton or accepts an electron pair whereas a base is proton acceptor or electron pair donor. Storonger is the acid weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base are related by (K_(w)=K_(a)xxK_(b) , where K_(w) is ionic prodcut of water equal to 10-14 at 25^(@) C. The numerical value of K_(w) however increases with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(14) .Thus, the [H^(+)] in a solution is expressed as : [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solutions are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. The pK_(a) value of NH_(4)^(+) is 9. The pK_(b) value of NH_(4) OH would be :

The dissociation of weak electrolyte (a weak base or weak acid) is expressed in terms of Ostwald's dilution law. An acid is substance which furnishes a proton or accepts an electron pair, where a base is proton acceptor or electron pair donor. Stronger is acid, weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base (K_(b)) are related by K_(w)=K_(a)xxK_(b) , where K_(w) is ionic product of water equal to 10^(-14) at 25^(@)C . The numerical value of K_(w) however increase with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(-14) . Thus the [H^(+)] in a solution is expressed as: [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solution are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. The pK_(a) value of NH_(4)^(+) is 9. The pK_(b) value of NH_(4)OH would be:

The dissociation of weak electrolyte (a weak base or weak acid) is expressed in terms of Ostwald's dilution law. An acid is substance which furnishes a proton or accepts an electron pair, where a base is proton acceptor or electron pair donor. Stronger is acid, weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base (K_(b)) are related by K_(w)=K_(a)xxK_(b) , where K_(w) is ionic product of water equal to 10^(-14) at 25^(@)C . The numerical value of K_(w) however increase with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(-14) . Thus the [H^(+)] in a solution is expressed as: [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solution are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. Which of the following statements are true ? (1) CIO_(4)^(-) is weak base than CIO_(3)^(-) (2) The degree of dissociation of weak is 1.8xx10^(-9) (3) The equilibrium constant for dissociation of H_(2)O is 1.78xx10^(-16) (4) PO_(4)^(3-) is conjugate acid of HPO_(4)^(2-)

The dissociation of weak electrolyte (a weak base or weak acid) id expressed in terms of Ostwald dilution law. An acid is a substance which furnishes a proton or accepts an electron pair whereas a base is proton acceptor or electron pair donor. Storonger is the acid weaker is its conjugate base. The dissociation constants of an acid (K_(a)) and its conjugate base are related by (K_(w)=K_(a)xxK_(b) , where K_(w) is ionic prodcut of water equal to 10-14 at 25^(@) C. The numerical value of K_(w) however increases with temperature. In a solution of an acid or base [H^(+)][OH^(-)]=10^(14) .Thus, the [H^(+)] in a solution is expressed as : [H^(+)]=10^(-pH) and pH+pOH=14 . Buffer solutions are the solutions which do not show appreciable change in the pH on addition of small amount of acid or base. Which of the follwoing statement are true? (P) CIO_(4)^(-) is weaker base than CIO_(3)^(-) (Q) The degree of dissociation of water at 25^(@)C is 1.8xx10^(-9) (R)The equilibrium constant for dissociation of H_(2)O is 1.8xx10^(-16) (S) PO_(4)^(3-) is conjugate acid of HPO_(4)^(2-)

An organic compound 'A' has molecular formula C_(9)H_(13)NO and it can be resolved into enatiomers. A does not decolourise bromine water solution. A on reflxing with dilute H_(2)SO_(4) yields another resolable compound B(C_(9)H_(14)O_(3)) which gives effervescence with NaHCO_(3) . B on treatemet with NaBH_(4) yields C(C_(9)H_(16)O_(3)) on heating with concentrated H_(2)O_(4) yields ester D(C_(9)H_(14)O_(2)) . Compound A on reduction with LiAIH_(4) , followed by treatement of H_(2)SO_(4) yields following compound: Find out structure of compound 'A' :

An organic compound 'A' has molecular formula C_(9)H_(13)NO and it can be resolved into enatiomers. A does not decolourise bromine water solution. A on reflxing with dilute H_(2)SO_(4) yields another resolable compound B(C_(9)H_(14)O_(3)) which gives effervescence with NaHCO_(3) . B on treatemet with NaBH_(4) yields C(C_(9)H_(16)O_(3)) on heating with concentrated H_(2)O_(4) yields ester D(C_(9)H_(14)O_(2)) . Compound A on reduction with LiAIH_(4) , followed by treatement of H_(2)SO_(4) yields following compound: The sweet smelling neutral compound D is: