Options:
- A. 21
- B. 23
- C. 25
- D. 27
View Answer
D. 27
Chemistry
If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?
Options:
- A. Heat of transition
- B. Heat of fusion
- C. Enthalpy change
- D. All of above
View Answer
C. Enthalpy change
The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is_____________________?
Options:
- A. Molar heat of sublimation
- B. Molar heat of fusion
- C. Molar heat of vapourization
- D. Latent heat of that liquid
View Answer
C. Molar heat of vapourization
All of the following were theorized by Bohr in his description of the atom except__________________?
Options:
- A. Angular momentum of electrons in multiples of h/2?
- B. Electrons revolve in discrete circular orbits
- C. Energy of each electron is directly proportional to n2
- D. Electrons radiate energy continuously in a given orbit.
View Answer
D. Electrons radiate energy continuously in a given orbit.
The magnetic quantum number (QN) has its values determined directly by the value of_______________?
Options:
- A. Principal (QN)
- B. Azimuthal (QN)
- C. Spin (QN)
- D. Both A & B
View Answer
B. Azimuthal (QN)
The maximum number of electron in a sub shell with ? = 3fs______________?
Options:
- A. 6
- B. 10
- C. 14
- D. 18
View Answer
C. 14
When an atom absorbs energy the lines in the spectrum will appear which are_________________?
Options:
- A. Brighter
- B. Darker
- C. Colourless
- D. Hard to locate
View Answer
B. Darker
Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________?
Options:
- A. More strength of H-bonding
- B. More strength of London forces
- C. Less polarizability
- D. All of the above
View Answer
B. More strength of London forces
Rising of a wetting liquid in a capillary tube is due to__________________?
Options:
- A. Surface tension
- B. Cohesive forces
- C. Adhesive forces
- D. viscosity
View Answer
C. Adhesive forces
The phenomenon in which a compound exists in two or more crystalline forms is called ________________?
Options:
- A. Isomorphism
- B. Polymorphism
- C. Anisotropy
- D. Allotropy
View Answer
B. Polymorphism