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.Management Sciences
Category: Stoichiometry
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?
0
A. PvB
B. xB.PvB
C. (Patm – Pvw)xB
D. xB.Patm
1 gm mole of methane (CH4) contains_________________?
A. 6.02 × 1023 atoms of hydrogen
B. 4 gm atoms of hydrogen
C. 3.01 × 1023 molecules of methane
D. 3 gms of carbon
Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?
A. Same elevation in boiling point
B. Different elevation in boiling point
C. Elevation in boiling point in the ratio of their molecular weights
D. None of these
The increase in the temperature of the aqueous solution will result in decrease of its________________?
A. Weight % of the solute
B. Mole fraction of the solute
C. Molarity
D. Molality
The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are__________________?
A. 3.01 × 1022
B. 6.02 × 1023
C. 9.03 × 1024
D. 1.20 × 1024
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