In the manufacture of ammonia by Haber's process, N2 (g) + 3H2 2NH3(g) + 92.3 KJ which of the following conditions is unfavourable ?
Increasing the temperature
Increasing the pressure
Reducing the temperature
Removing ammonia as it is formed
NH3 and HCl gas are introduced simultaneously from the two ends of a long tube. A white ring of NH3Cl appears first
nearer to the HCl end
at the centre of the tube
throughout the tube
nearer to the NH3 end
A.
nearer to the HCl end
White ring of NH3Cl will appear nearer to the HCl end. The reason is that HCl (molecular weight = 36.5) is heavier than NH3 (molecular weight = 17). Hence, according to Graham's law of diffusion, the rate of diffusion of NH3 will be higher than that of HCl.
Among the halogens, the one which is oxidised by nitric acid is
Fluorine
iodine
chlorine
bromine
The metal which does not form ammonium nitrate by reaction with dilute nitric acid is
Al
Fe
Pb
Mg
The elements with atmoic numbers 9, 17, 35, 53, 85, are all
noble gases
halogens
heavy metals
light metals
When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is
benzotrichloride
chlorobenzene
gammexane
DDT
Ethyl benzoate reacts with PCl5 to give
C2H5Cl + C6H5COCl + POCl3 + HCl
C2H5Cl + C6H5COCl + POCl3
CH3COCl + C6H5COCl + POCl3
C2H5Cl + C6H5COOH + POCl3
Urea is preferred to ammonium sulphate as a nitrogenous fertiliser because
it is more soluble in wate
it is cheaper than ammonium sulphate
it is quite stable
it does not cause acidity in the soil