Hydrolysis of urea is an example of
homogenous catalysis
heterogenous catalysis
biochemical catalysis
zeolite catalysis
The radius ratio in CsCl is 0.93. The expected lattice structure is
tetrahedral
square planar
octahedral
body-centred cubic
The vapour pressure of pure liquid A is 0.80 atm. When a non volatile B is added to A its vapour pressure drops to 0.60 atm. The mole fraction of B in the solution is
0.125
0.25
0.5
0.75
The velocity of oxidation of oxalic acid by acidified KMnO4 increases as the reaction progress. It is an example of
promoters
catalytic poisons
autocatalysis
inhibitors
Osmotic pressure of a solution at a given temperature
increases with concentration
decreases with concentration
remains same
initially increases and then decreases
Which of the following is not a property of colloidal solution?
Heterogeneity
Particle size > 100 nm
Tyndall effect
Brownian movement
The hydroxide insoluble in NH4OH + NH4Cl is
Al(OH)3
Ca(OH)3
Zn(OH)2
Mg(OH)2
A.
Al(OH)3
When aluminium salt reacts with NH4OH, then a white ppt of Al(OH)3 is obtained which is insoluble in excess of NH4OH solution.
AlCl3 + 3NH4OH → 3NH4Cl + Al(OH)3
The hydroxide of iron, chromium and aluminium are insoluble in excess of NH4OH solution.
Time period of a wave is 5 × 10-3 s, what is the frequency?
5 × 10-3 s-1
2 × 102 s-1
2.3 × 103 s-1
5 × 102 s-1
The osmotic pressure (At 27° C) of an aqueous solution (200 mL) containing 6 g of a protein is 2 × 10-3 atm. If R = 0.080 L atm mol-1 K-1 , the molecular weight of protein is
7.2 × 105
3.6 × 105
1.8 × 105
1.0 × 105