A. Change in state of the system is increased
B. The temperature of the system may rise
C. The chemical reaction may take place
D. All
✅ The correct answer is option D.
Chemistry MCQs
For a reaction involving only gases at 25°C, the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp?
A. Kc is generally greater than Kp
B. Kc is generally less than Kp
C. Kc is generally equal to Kp
D. Kc is equal to Kp if the total moles of reactants and products are equal
✅ The correct answer is option D.
Which is true for a spontaneous endothermic process?
A. ΔH<0
B. ΔG<0
C. ΔS<0
D. ΔG>0
✅ The correct answer is option B.
Which of following is not a base
A. KOH
B. NH3
C. PH3
D. BF3
✅ The correct answer is option D.
A reaction has values of ΔH and ΔS which are both positive. The reaction
A. Is spontaneous
B. Spontaneity is temperature dependent
C. Has an increasing free energy
D. Is non-spontaneous
✅ The correct answer is option D.
Which of the following has strongest intermolecular forces of attraction?
A. Hydrogen (H2)
B. Chlorine (Cl2)
C. iodine (I2)
D. Methane (CH4)
✅ The correct answer is option C.
________________ is study about energy of a chemical system
A. Thermochemistry
B. Thermodynamics
C. Chemical kinetics
D. Stoichiometry
✅ The correct answer is option A.
Which has the strongest bonding in the solid state?
A. Hydrogen Chloride (HCI)
B. Chlorine (Cl2)
C. Xenon(Xe)
D. Sodium Chloride (NaCI)
✅ The correct answer is option D.
The group 1 elements are named as alkali metals because
A. Their oxides are basic
B. Their oxide and hydroxides are water soluble
C. Both a & b
D. They are found in the earth
✅ The correct answer is option C.
The environment in which a system is studied is
A. State function
B. Phase
C. Surrounding
D. State
✅ The correct answer is option C.