Options:
- A. First order reaction
- B. Second order reaction
- C. Zero order reaction
- D. Third order reaction
View Answer
C. Zero order reaction
Chemistry
The volume occupied by 2.8 g of N2 at STP______________________?
Options:
- A. 2.24 dm3
- B. 22.4 dm3
- C. 1.12 dm3
- D. 112 dm3
View Answer
A. 2.24 dm3
Avogadros number may represent_________________?
Options:
- A. volume of particles
- B. number of particles
- C. mass of particles
- D. All of the above
View Answer
D. All of the above
As a substance moves from a solid to a liquid 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. molecules move more frequently.
View Answer
B. K.E of the molecules decreases
A solution has pH = 0 its H+ ion concentration is__________________?
Options:
- A. 1 x 10-1
- B. 1 x 10-14
- C. 1 x 10-7
- D. 1
View Answer
D. 1
Purines and pyrimidines are_________________?
Options:
- A. Enzymes
- B. Nitrogenous bases
- C. Carbohydrates
- D. Lipids
View Answer
B. Nitrogenous bases
Acid present in acid rain may be_________________?
Options:
- A. H2SO4
- B. HNO3
- C. both A and B
- D. none of the above
View Answer
C. both A and B
The number of moles of CO2 which contains 16 g of oxygen is__________________?
Options:
- A. 0.25
- B. 0.5
- C. 0.75
- D. 1
View Answer
B. 0.5
Size of molecule depends upon________________?
Options:
- A. Atomicity
- B. Shape of molecule
- C. Both A and B
- D. Difficult to predict
View Answer
C. Both A and B
The rectified spirit is________________?
Options:
- A. 12% alcohol
- B. 90% alcohol
- C. 95% alcohol
- D. 100% alcohol
View Answer
C. 95% alcohol