Options:
- A. PCI5 = PCI3 + Cl2
- B. N2 + 3H2 = 2NH
- C. 2CO + O2 = CO2
- D. N2 + O2 = 2NO
View Answer
D. N2 + O2 = 2NO
Chemistry
Which of the following air pollutants is more dangerous for ozone layer ?
Options:
- A. CFC
- B. CO2
- C. CO
- D. Oxides of nitrogen
View Answer
A. CFC
Which of the following gases is the main cause of acid rain ?
Options:
- A. CO
- B. NO2
- C. both a & b
- D. none of the above
View Answer
B. NO2
Boiling point elevations can be measured by__________________?
Options:
- A. Beckmanns method
- B. Landsbergers method
- C. Linds method
- D. none of the above
View Answer
B. Landsbergers method
Ratio of the amount of solute in organic and aqueous solvent is________________?
Options:
- A. Retardation factor
- B. Distribution co-efficient
- C. Distribution in aqueous solution
- D. All statements are wrong
View Answer
B. Distribution co-efficient
Safe and the most reliable method of drying crystals is through_________________?
Options:
- A. Filter paper
- B. Vacuum desiccators
- C. Oven
- D. None of these
View Answer
B. Vacuum desiccators
A specie with maximum number of unpaired electrons ?
Options:
- A. F
- B. H2O
- C. HF
- D. NH-2
View Answer
D. NH-2
The relative attraction of the nucleus for the electrons in a chemical bond is called _________________?
Options:
- A. Ionization energy
- B. Electron affinity
- C. Electro negativity
- D. None of the above
View Answer
C. Electro negativity
Which one of the following has polar covalent bond ?
Options:
- A. HF
- B. CH4
- C. H2
- D. N2
View Answer
A. HF
One mole of an ideal gas at 546.5 K under 2 atm pressure has a volume of________________?
Options:
- A. 22.414 m3
- B. 44.828 dm3
- C. 22.414 dm3
- D. 11.212 cm3
View Answer
C. 22.414 dm3