The number of lone pair(s) of electrons on the central atom is [BrF4]-, XeF6 and [SbCl6]3- are, respectively
2, 1 and 1
2, 1 and 0
2, 0 and 1
1, 0 and 0
The lewis acidity of BF3 is less than BCl3 even though fluorine is more electrongative than chlorine. It is due to
stronger 1p (B)-3p(Cl) σ- bonding
stronger 2p(B) - 3p(Cl) π-bonding
stonger 2p(B) - 2p(F) σ- bonding
stronger 2p(B)- 2p(F) π-bonding
If enthaplies of formation for C2H2(g), CO2(g) and H2O(l) at 25°C and 1atm pressure be 52, -394 and -286kJ mol-1 respectively, then the enthaply of combustion of C2H4(g) will be
-141.2 kJ mol-1
-1412 kJ mol-1
+ 141.2 kJ mol-1
+ 1412 kJ mol-1
The equilibrium constants of the reactions
and are K1 respectively. The relationship between K1 and K2 will be
K2
K2 = √K1
K1= K2
The geometry around the central atom in ClF
octahedral
trigonal bipyramidal
square planar
square pyramidal
Among the following, the equilibrium which is not affected by an increase in pressure is
C(s) + H2O (g) CO(g) + H2(g)
3Fe(s) + 4H2O (g) Fe3O4 (s) + 4H2(g)
2SO3(g) 2SO2(g) + O2 (g)
H2 (g) + I2(s) 2Hi(g)
When a liquid that is immiscible with water was steam distilled at 95.2°C at a total pressure of 99.652 kPa. The distillate contained 1.27 g of the liquid per gram of water. What will be the molar mass of the liquid if the vapour pressure of water is 85.140 kPa at 95.2°C?
99.65 g mol-1
18 g mol-1
134.1 g mol-1
105.74 g mol-1
What is pH of 2 x 10-8 molar HCl solution? Here, log 2 = 0.301 and log 3 = 0.477.
6.92
9.5
5.4
7.7