A. More stable
B. Less stable
C. Not at all stable (like nascent O2)
D. Either more or less stable; depends on the compound
Related Mcqs:
- The amount of heat required to decompose a compound into its elements is _____________ the heat of formation of that compound from its elements?
A. Less than
B. More than
C. Same as
D. Not related to - Heat requirement for decomposition of a compound into its elements is _____________ that is evolved during the formation of that compound from its elements?
A. The same
B. Less than
C. Greater than
D. Different than - “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?
A. Law of Petit and Dulong
B. Kopp’s rule
C. Nernst heat theorem
D. Trouton’s rule - The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?
A. 100,000 kW
B. 160,000 kW
C. 200,000 kW
D. 320,000 kW - Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________________?
A. Calorific value
B. Heat of reaction
C. Heat of combustion
D. Heat of formation - Molar heat capacity of water in equilibrium with ice at constant pressure is_____________________?
A. 0
B. ∞
C. 1
D. None of these - Heat of formation of an element in its standard state is___________________?
A. 0
B. 0
D. A function of pressure - The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΔH = – 394 kJ/kg .mole CO + ½ O2 = CO2, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole?
A. -109.5
B. +109.5
C. +180
D. +100 - Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of _____________________?
A. Sublimation
B. Fusion
C. Transition
D. Vaporisation - The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by__________________?
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/R1
