GURU MCQs provides MCQs of Chemistry from Basic to Advance, so that you can prepare accordingly. MCQs of Chemistry section covers important topics of chemistry. Most repeated Chemistry MCQs frequently encountered in Inspector, ASI, Sub-inspector, Constable, FPSC, PPSC, ETEA, FIA, Police, Army, Navy, Airforce, IB, MOFA, ASF, LHC, Educators, and various other competitive exams, as well as government and private job assessments. Chemistry most repeated MCQs include Basic chemistry MCQs, Chemical Bond MCQs, Gases MCQs, Liquids and Solids MCQs, Hydrocarbons MCQs, Polymerization MCQs, Rates of Reactions MCQs, Transition Elements MCQs, Organic Chemistry MCQs, Electrons in Atoms MCQs, Moles and Equations MCQs, et
31. ________________ is study about energy of a chemical system ?
A. thermochemistry
B. thermodynamics
C. chemical kinetics
D. stoichiometry
32. Which of the following has strongest intermolecular forces of attraction ?
A. Hydrogen (H2)
B. Chlorine (Cl2)
C. lodine (I2)
D. Methane (CH4)
33. When substance moves from a solid to a liquid state all of the following changes occur except__________________?
A. Molecules become more disordered
B. K.E of the molecules decreases
C. Intermolecular forces become weaker
D. Molecule become further separated
34. In order to mention the boiling point of water at 110°C the external pressure should be ?
A. Between 760 torr and 1200 torr
B. Between 200 torr and 760 torr
C. 765 torr
D. any value of pressure
35. Vapour pressure of water at 100°C is___________________?
A. 55 mm Hg
B. 760 mm Hg
C. 355 mm Hg
D. 1489 mm Hg
36. Liquid crystal is discovered by __________________?
A. William Crooks
B. Fredrack Reinitzer
C. J.J Thomson
D. Bravis
37. Hydrogen bonding is involved in____________________?
A. Solubility
B. Cleansing action of detergents
C. Biological molecules
D. All
38. Forces of attraction which may be present between all kinds of atoms and molecules are _____________________?
A. intramolecular
B. intermolecular
C. van der Waal
D. Dipole-induced dipole
39. The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?
A. vaporization
B. evaporation
C. crystallization
D. sublimation
40. Water has maximum density at __________________?
A. 0°C
B. 2°C
C. 4°C
D. 100°C