The correct discending order of oxidising power of the following is
B.
Oxidising power depends upon the stability of reduction product obtained. Since, lower oxides of Mn are more stable than that of Cr and V, so the order of oxidising power is-
The number of electrons that are involved in the reduction of permanganate to manganese (II) salt, manganate and manganese dioxide respectively are
5, 1, 3
5, 3, 1
2, 7, 1
5, 2, 3
The calculated magnetic moment of a divalent ion of an atom with atomic number 24 in aqueus solution is
4.90 BM
5.92 BM
3.87 BM
2.84 BM
The entropy of vaporisation of a liquid is 58 JK-1 mol-1. If 100 g of its vapour condenses at its boiling point of 123° C, the value of entropy change for the process is
-100 JK-1
100 JK-1
-123 JK-1
123 JK-1
The values of limiting ionic conductance of H+ and HCOO- ions are respectively 347 and 53S cm2 mol-1, the dissociation constant of methanoic acid at 298 K is
2.5 × 10-4
2 × 10-5
2.5 × 10-5
1.5 × 10-4
In a closed cylinder of capacity 24.6 L, the following reaction occurs at 27°C.
A2 (s) B2 (s) + 2C (g)
At equilibrium, 1 gm of B2 (s) (molar mass = 50 g mol-1) is present. The equilibrium constant Kp for the equilibrium in atm2 unit is
(R = 0.082 L atm K-1 mol-1)
1.6 × 10-2
1.6 × 10-5
1.6 × 10-3
1.6 × 10-4
The pH of a saturated solution of a metal hydroxide of formula X(OH)2 is 12.0 at 298 K. What is the solubility product of a metal hydroxide at 298 K (in mol3 L-3)?
5 × 10-7
2 × 10-6
1 × 10-7
5 × 10-5
The IUPAC name of the complex [Co(NH3)2(H2O)4]Cl3 is
diaminetetraaquacobalt (III) trichlodde
diaminetetraaquacobalt (II) chloride
diaminetetraaquacobalt (III) chloride
tetraaquadiaminecobalt (III) trichloride
The products obtained by the ozonolysis of 2-ethylbut-1-ene are
propanone and ethanal
methanal and 3-pentanone
ethanal and 3-pentanone
butanal and ethanal
When but-2-yne is treated with Na in liquid ammonia
cis-2-butene is obtained
trans-2-butene is formed
n-butane is the major product
it rearranges to but-1-yne