Chemistry MCQS

21. The natural abundance of O16 is?
(A) 0.204%
(B) 99.76%
(C) 0.037%
D) None of the above

22. What is the unit of ionization energy?
(A) Mole
(B) Nanometer
C) KJ/mole
(D) Kg/mole

23. Who discovered sulfuric acid?
A) Jabir Bin Hayan
(B) Al Hajiz
(C) Rutherford
(D) None of the above

24. Who discovered the phenomenon of diffusion of gases?
A) Graham
(B) Lewis
(C) Bohr
(D) Rutherford

25. A complete reaction is in which all Reactants changed into __ .
(A) Acids
(B) Chemicals
C) Products
(D) None of the above

26. Which of the following chemical reactions is always spontaneous?
A. Exothermic and increasing disorder
B. Exothermic and decreasing disorder
C. Endothermic and increasing disorder
D. Endothermic and decreasing disorder

27. In a process in which volume remains constant:
A. Isothermal
B. Isochoric
C. Isobaric
D. Adiabatic

28. If a gas at constant temperature and pressure expands; then its internal energy __:
A. Increases
B. Decreases
C. Remains constant
D. None of the above

29. Branch of chemistry which deals with inter-conversion of electrical and chemical energy is called:
A. Electrochemistry
B. Kinetics
C. Chemical thermodynamics
D. Thermochemistry

30. Laws of electrolysis were presented by:
A. Faraday
B. Rutherford
C. Henry
D. Moseley