Please select a subject first
Advertisements
Advertisements
Calculate the enthalpy of hydrogenation of C2H4(g), given that the enthalpy of formation of ethane and ethylene are −30.2 kcal and +12.5 kcal respectively.
Concept: undefined >> undefined
When ethyl methyl ether is treated with cold concentrated HI, it gives two products. Products formed are ____________.
Concept: undefined >> undefined
Advertisements
Combustion of glucose takes place as
\[\ce{C6H12O6_{(s)} + 6O2_{(g)} -> 6CO2_{(g)} + 6H2O_{(g)}}\]; ΔH = −72 kcal mol−1
The energy needed for the production of 1.8 g of glucose by photosynthesis will be ___________.
Concept: undefined >> undefined
The enthalpy of formation of nitrogen dioxide is +33.2 kJ mol−1. The enthalpy of the reaction \[\ce{2N2_{(g)} + 4O2_{(g)} -> 4NO2_{(g)}}\]; is ____________.
Concept: undefined >> undefined
The radius of the third Bohr orbit for hydrogen atom is ____________.
Concept: undefined >> undefined
What will be the volume of oxygen gas produced, if the reaction \[\ce{2KClO_{3(s)} -> 2KCl_{(s)} + 3O_{2(g)}}\]; ΔH° = - 78 kJ is carried out at S.T.P.?
Concept: undefined >> undefined
How many moles of methane are present in 11.2 Lat S.T.P.?
Concept: undefined >> undefined
In resonance hybrid of ozone molecule, O-O bond length is ____________.
Concept: undefined >> undefined
Which among the following oxides is amphoteric in nature?
Concept: undefined >> undefined
What is the colour of gaseous ozone?
Concept: undefined >> undefined
Van't Hoff factor for K3[Fe(CN)6] is 3.333. What is it's percentage dissociation in water?
Concept: undefined >> undefined
Why is observed molar mass of acetic acid in benzene is greater than actual molar mass?
Concept: undefined >> undefined
Standard enthalpy of formation of water is - 286 kJ mol-1. When 1800 mg of water is formed from its constituent elements in their standard states the amount of energy liberated is ______.
Concept: undefined >> undefined
Given that,
\[\ce{C_{(s)} + O_{2(g)} -> CO_{2(g)}}\] ΔH° = -X kJ
\[\ce{2CO_{(g)} + O_{2(g)} -> 2CO_{2(g)}}\] ΔH° = - Y kJ, then standard enthalpy of formation of carbon monoxide is ________.
Concept: undefined >> undefined
Which of the following equations is NOT correct for van't Hoff factor?
Concept: undefined >> undefined
An ideal gas expands isothermally and reversibly from 10 m3 to 20 m3 at 300 K performing 5 .187 kJ of work on surrounding. Calculate number of moles of gas undergoing expansion. (R = 8.314 J K-1 mol-1)
Concept: undefined >> undefined
Heat of formation of water is - 272 kJ mol-1. What quantity of water is converted to H2 and O2 by 750 kJ of heat?
Concept: undefined >> undefined
Standard entropies of N2(g), H2(g), and NH3(g) are a1, a2 and a3 J K-1 mol-1 respectively. What is value of ΔS° for formation of NH3(g)?
Concept: undefined >> undefined
Which gas among the following contains a maximum number of molecules at STP?
(Molar masses in g mol-1 : CO2 = 44, Ar = 39.9, CH4 = 16, O2 = 32)
Concept: undefined >> undefined
Which of following 0.1 m aqueous solution exhibits highest osmotic pressure at 25°C?
Concept: undefined >> undefined
