Related Questions

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
Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of
A Fusion
B Vaporisation
C Transition
D None of these
In presence of a catalyst the heat evolved or absorbed during a reaction-
A Increases
B Decreases
C May increase ofr decrease
D Remains unaffected
The total change in the enthalpy of a system is independent of the
A Number of intermediate chemical reactions involved
B Pressure and temperature
C State of combination and aggregation in the beginning and at the end of the reaction
D None of these
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the
A Differential heat of adsorption
B Heat of wetting
C Integral heat of adsorption
D None of these
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant
A Pressure
B Temperature
C Volume
D Internal energy
In a refrigeration system, heat absorbed in comparison to heat rejected is
A More
B Less
C Same
D More for small capacity and less for high capacity
High pressure steam is expanded adiabati-cally and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:
A ΔH = 0 and ΔS = 0
B ΔH ≠ 0 and ΔS = 0
C ΔH ≠ 0 and ΔS ≠ 0
D ΔH = 0 and ΔS ≠ 0
If Net Sales is Tk. 1,20,000. Net Profit is Tk. 48,000 and Average Asset is Tk. 150,000 then which of the following is the Net Profit Margin
A 40%
B 50%
C 55%
D 60%
Attention is most often focused on net exports because that figure measures the net effect of a nation's trade in goods and services with the rest of the world . In 2000, net exports were 5.8% of GNP and in 2005, they were 6.8% . If the information above
A Exports were greater than imports in 2005, but not in 2000.
B Exports increased from 2000 to 2005
C In 2005, the increased in Exports was nearly double of that in 2000.
D In 2000, net exports were gerater than in 2005.

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