Options:
- A. environment
- B. surrounding
- C. state function
- D. enthalpy
View Answer
C. state function
Chemistry
When substance moves from a solid to a liquid state all of the following changes occur except__________________?
Options:
- A. Molecules become more disordered
- B. K.E of the molecules decreases
- C. Intermolecular forces become weaker
- D. Molecule become further separated
View Answer
B. K.E of the molecules decreases
Amorphous substances posses_________________?
Options:
- A. No definite geometry
- B. No definite heat of fusion
- C. No sharp melting points
- D. All of the above
View Answer
C. No sharp melting points
The boiling point increases down the zero group element due to_________________?
Options:
- A. Ion dipole forces
- B. London forces
- C. Hydrogen bonding
- D. Dipole dipole forces
View Answer
B. London forces
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
Electronic configuration of K is_________________?
Options:
- A. [Ar]4s2
- B. [Ar]4s1
- C. [Kr]5s1
- D. [He]2s1
View Answer
B. [Ar]4s1
Charge of electron was measured by__________________?
Options:
- A. J.J Thomson
- B. Millikan
- C. Rutherford
- D. Perrin
View Answer
B. Millikan
Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is___________________?
Options:
- A. Stoichio chemistry
- B. Physical chemistry
- C. Analytical chemistry
- D. Quantum chemistry
View Answer
C. Analytical chemistry
When benzene is heated in air with V2O5 at 450
Options:
- A. Phenol
- B. Maleic anhydride
- C. Glyoxal
- D. Benzoic acid
View Answer
B. Maleic anhydride
For which system does the equilibrium constant Kc has unit of (concentration)-1__________________?
Options:
- A. N2+3H2 2NH3
- B. H2+I2 2HI
- C. 2NO2 N2H4
- D. PCI5 PCI3+CI2
View Answer
C. 2NO2 N2H4