Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________?
A. More strength of H-bonding B. More strength of London forces C. Less polarizability D. All of the above
Chemistry MCQs
The phenomenon in which a compound exists in two or more crystalline forms is called ________________?
A. Isomorphism B. Polymorphism C. Anisotropy D. Allotropy
Bucky balls is an allotropic from of__________________?
A. Sulphur B. Carbon C. Silica D. Tin
Isomorphic substances have _______________?
A. Same physical and chemical properties B. Same physical and different chemical properties C. Different physical and same chemical properties D. Different physical and chemical properties
The pressure during the molar heat of fusion is kept________________?
A. 0 atmosphere B. one atmosphere C. 2 atmosphere D. 10 atmosphere
All the enthalpy changes are________________?
A. Negative B. Positive C. May or may not be A or B D. none
Which has strongest bonding in the solid state ?
A. Hydrogen Chloride (HCI) B. Chlorine (Cl2) C. Xenon(Xe) D. Sodium Chloride (NaCI)
When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?
A. ABAB (hexagonal) B. ABCABC (Cubic) C. Orthor hombic D. Rhombohedral
Which one is false for evaporation ?
A. Surface phenomenon B. Continuous C. Exothermic D. Cause cooling
Which one of the following does not show hydrogen bonding?
A. Water B. Ethyl alcohol C. Phenol D. Diethyl ether