Options:
- A. FeS2
- B. HgS
- C. PbS
- D. ZnS
View Answer
B. HgS
Chemistry
According to vital force theory_______________?
Options:
- A. Oorganic compounds can be synthesized from inorganic compounds
- B. organic compounds cannot be synthesized from inorganic compounds
- C. organic compounds can be synthesized by animals
- D. organic compounds can be synthesized by plants
View Answer
B. organic compounds cannot be synthesized from inorganic compounds
Octane number can be improved by________________?
Options:
- A. Isomerization
- B. Adding (C2H5)4 Pb
- C. Adding (CH3)4 Pb
- D. All
View Answer
D. All
In sp3 hybridization the expected geometry of molecules will be__________________?
Options:
- A. square planar
- B. trigonal pyramidal
- C. tetrahedral
- D. linear
View Answer
C. tetrahedral
Enthalpy of combustion for food fuel and other compounds can be measured accurately by________________?
Options:
- A. glass calorimeter
- B. bomb calorimeter
- C. thermometer
- D. manometer
View Answer
B. bomb calorimeter
Formation of vapours from the surface of a liquid is called________________?
Options:
- A. vapourization
- B. evaporation
- C. condensation
- D. cracking
View Answer
B. evaporation
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_________________?
Options:
- A. ABAB (hexagonal)
- B. ABCABC (Cubic)
- C. Orthor hombic
- D. Rhombohedral
View Answer
A. ABAB (hexagonal)
The viscosity of solids is________________?
Options:
- A. Infinite
- B. Negligible
- C. Medium
- D. No concept of viscosity in solid
View Answer
A. Infinite
The value of e/m ratio of electron is________________?
Options:
- A. 6.02 x 1023 C/kg
- B. 1.7588 x 1020 C/kg
- C. 9.1095 x 10-31 C/kg
- D. 1.7588 x 1011 C/kg
View Answer
D. 1.7588 x 1011 C/kg
Colour of fluorescene produced by cathode rays depends upon________________?
Options:
- A. Temperature
- B. Pressure
- C. Volume
- D. Composition of glass
View Answer
D. Composition of glass