`((469+174)^2-(469-174)^2)/(469xx174)=?` (a) 2 (b) 4 (c) 295 (d) 643

((469+174)^(2)-(469-174)^(2))/(4(c)295(d)643)=?(a)2(b)

2 6 33 49 174 210 ?

3/8 of 168xx15-:15+?=549-:9+235 (a) 107 (b) 174 (c) 189 (d) 296 (e) None of these

The equilibrium constant for CN^(-) + CH_(3)COOH hArr HCN + CH_(3)COO^(-) is: (Given pK_(b) for CN^(-) = 4.69 and pK_(b) for CH_(3)COO^(-) = 2.25 )

lamda^(oo) of NH_4OH at infinite dilution is ______ Scm^2 eq^(-1) given lamda^(oo) of OH^(-) = 174 , lamda^(oo) of OH^(-) = 174 , lamda^(oo) of Cl = 66 and lamda^(oo) of NH_4Cl = 130 Scm^2eq^(-1)

4+4.44+0.4+44.04+444=?(a)469.88(b)487.66(c)496.88(d)497.24(e) None of these

If [(1,3,9),(1,x,x^(2)),(4,6,9)] is singular matrix then x =