Options:
- A. 1
- B. 2
- C. 3
- D. 4
View Answer
C. 3
Chemistry
Which of the following is the formula of chrome red ?
Options:
- A. Pb3 O4
- B. 2Pb CO3
- C. Pb Cr O4
- D. Pb2O
View Answer
A. Pb3 O4
Which statement is consistent with Hunds rule ?
Options:
- A. Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.
- B. The electrons in the same atom cannot have the same four quantum numbers
- C. There is maximum of two electrons is an orbital.
- D. None
View Answer
A. Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.
Regular coiling or zigzagging of polypeptide through hydrogen bonding is its___________________?
Options:
- A. Quantum structure
- B. Secondary structure
- C. Tertiary structure
- D. Primary structure
View Answer
B. Secondary structure
Which of the following is mineral fiber ?
Options:
- A. Teflon
- B. asbestos
- C. saran
- D. acrylic
View Answer
B. asbestos
In the van der Waals equation (P + n2a / v2) (v
Options:
- A. n2a/v correct for the intermolecular forces.
- B. nb correct for the volume occupied by gas molecules.
- C. at high densities the equation reduces to the ideal gas law
- D. all of the above statements are correct.
View Answer
C. at high densities the equation reduces to the ideal gas law
When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?
Options:
- A. 0.5
- B. 1
- C. 1.5
- D. 2
View Answer
D. 2
Dempsters mass spectrometer has number of zones / parts_________________?
Options:
- A. 5
- B. 4
- C. 3
- D. 2
View Answer
A. 5
All the following variables are used to describle gases except__________________?
Options:
- A. pressure
- B. volume
- C. moles
- D. density
View Answer
D. density
Which of the following ion formation is always exothermic ?
Options:
- A. Uni-negative
- B. Uni-positive
- C. Di-negative
- D. Di-positive
View Answer
A. Uni-negative