Chemistry Question Papers Online Exam Quiz
Chemistry Question Papers GK Quiz. Question and Answers related to Chemistry Question Papers. MCQ (Multiple Choice Questions with answers about Chemistry Question Papers
The standard state of a substance is considered when the temperature is 298 k and the pressure is ____________
Options
A : 1 ATM
B : 1 bar
C : 1 Pascal
D : 760 mm HG
What is a change in energy if 18 grams of water is heated from room temperature to 20 degrees above it?
Options
A : 1.50 KJ
B : 0.506 KJ
C : 1.06 KJ
D : 1.506 KJ
Calculate the internal energy change when 2 moles of water at 0 degrees converts into ice at 0-degree centigrade?
Options
A : 12 KJ per mole
B : 6 KJ per mole
C : 1 KJ per mole
D : 102 KJ per mole
Consider that, a ball is immersed in water at room temperature and then taken out having 18 grams of water on it, how much amount of energy is required to dry that water at room temperature?
Options
A : 41.43 KJ/mol
B : 49.53 KJ/mol
C : 41.3 KJ/mol
D : 41.53 KJ/mol
Which of the following is not an application of Hess’s law?
Options
A : determination of heat of formation
B : determination of heat of transition
C : determination of Gibb’s energy
D : determination of heat of hydration
What is the unit of standard enthalpy of fusion or molar enthalpy of fusion?
Options
A : KJ Mol
B : KJ per Mol
C : Mol per KJ
D : 1/KJ Mol
Consider the equation 2 H2 + O2 ? 2 H2O, what does the 2 in the coefficient of H2O molecule represent?
Options
A : number of particles
B : the number of molecules
C : number of moles
D : number of atoms
All the enthalpies of fusion are positive.
Options
A : true
B : false
C :
D :
When a chemical reaction is reversed the value of enthalpy is reversed in sign.
Options
A : true
B : false
C :
D :
?Hr = ? ?Hf[products] – ? ?Hf[reactants].
Options
A : true
B : false
C :
D :
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