Options:
- A. Single covalent bond
- B. Hydrogen bond
- C. Double covalent bond
- D. Coordinate covalent bond
View Answer
D. Coordinate covalent bond
Chemistry
Which one is not the partial pressure of oxygen in the lungs ?
Options:
- A. 0.1526 atm
- B. 116 mm of Hg
- C. 116 torr
- D. 1 atm
View Answer
D. 1 atm
The spreading of fragrance or scent in air is due to_______________?
Options:
- A. Diffusion
- B. Effusion
- C. Attraction with air
- D. Low dsensity
View Answer
A. Diffusion
Catalyst used to speed up the reaction of ammonia synthesis is________________________?
Options:
- A. V2O5
- B. V2O5 and Pt
- C. Fe
- D. Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
View Answer
D. Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
Options:
- A. 0.0002M HCI
- B. 0.2 mole of NaCI with 0.2 mole of HNO3
- C. 0.4 mole of CH3COOH with 0.4 mole of NaOH
- D. 0.4 mole of NH3 with 0.2 mole of HCI
View Answer
D. 0.4 mole of NH3 with 0.2 mole of HCI
In the purification of portable water the coagulant used is_________________?
Options:
- A. alum
- B. nickel sulphate
- C. copper sulphate
- D. barium sulphate
View Answer
A. alum
A single chlorine free radical can destroy how many ozone molecules ?
Options:
- A. 10
- B. 100
- C. 10000
- D. 100000
View Answer
D. 100000
Solution of Na2SO4 will be_________________?
Options:
- A. basic
- B. acidic
- C. neutral
- D. cannot be presicted without data
View Answer
C. neutral
Crystallization does not involve_______________?
Options:
- A. heating
- B. sublimation
- C. cooling
- D. vaporization
View Answer
B. sublimation
The solvent or mixture of solvents used for separation of compounds is called____________________?
Options:
- A. Stationary phase
- B. Mobile phase
- C. Dynamic phase
- D. Static phase
View Answer
B. Mobile phase