1m3 is approximately equal to:
A. 28 litres
B. 35 ft3
C. 4.5 litres
D. 4.5 ft3
____ fuels require the maximum percentage of ‘excess air’ for complete combustion:
A. Solid
B. Liquid
C. Gaseous
D. Nuclear
Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution):
A. log (1/H+)
B. – log (1/H+)
C. 1/log H+
D. None of these
Heat of transition is the heat evolved or absorbed, when a substance is converted from:
A. Vapor to liquid
B. Vapor to solid
C. Solid to liquid
D. One allotropic form to another allotropic form
The vapor pressure of water at 100°C is:
A. 100 N/m2
B. 76 cms of Hg
C. 13.6 cms of Hg
D. 760 mm wc
The OH- concentration in a solution having pH value 3 is:
A. 10-3
B. 10-10
C. 10-11
D. 10-13
pH value of H2SO4 (5% concentration) is:
A. 5
B. 7
C. > 7
D. < 7
Raoult’s law is not applicable to the:
A. Solutes which dissociate or associate in the particular solution
B. Concentrated solutions
C. Both B. & C.
D. Solutions containing non-volatile solute
Heat of neutralisation of HCl and NaOH is – 57.46 kJ/Kg mole. The heat of ionisation of water will be ____ kJ/Kg mole:
A. 57.46
B. -57.46
C. 114.92
D. -28.73
Which of the following is followed by an ideal solution:
A. Boyle’s law
B. Amagat’s law
C. Raoult’s law
D. Trouton’s rule
