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- Question
The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are
Options- A. 3.01 x 1022
- B. 6.02 x 1023
- C. 9.03 x 1024
- D. 1.20 x 1024
- Correct Answer
- 9.03 x 1024
- 1. During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.
Options- A. enthalpy
- B. Gibbs free energy
- C. internal energy
- D. entropy Discuss
- 2. The pressure of 'V' litres of a dry gas is increased from 1 to 2 kgf/cm2 at a constant temperature. The new volume will become
Options- A. V/2
- B. 2V
- C. V/4
- D. V2 Discuss
- 3. Internal energy of a substance comprises of the __________ energy.
Options- A. vibrational
- B. rotational
- C. translational
- D. all (a), (b) & (c) Discuss
- 4. Heat of reaction is not influenced by
Options- A. the route/method through which final products are obtained.
- B. the physical state (e.g., solid, liquid or gaseous) of reactants and products.
- C. whether the reaction is carried out at constant temperature or constant pressure.
- D. none of these. Discuss
- 5. Mass number of an atom is the sum of the numbers of
Options- A. neutrons and protons
- B. protons and electrons
- C. neutrons and electrons
- D. both(a)&(b) Discuss
- 6. 1 Pascal (unit of pressure) is equal to __________ N/m2.
Options- A. 10
- B. 1
- C. 0.1
- D. 1000 Discuss
- 7. An oxidation process is accompanied by decrease in the
Options- A. number of electrons.
- B. oxidation number.
- C. number of ions.
- D. all (a), (b) & (c). Discuss
- 8. Colligative properties of a dilute solution are those, which depend entirely upon the
Options- A. chemical composition of the solute.
- B. constitution of the solute.
- C. number of solute molecules contained in a given volume of the solvent.
- D. none of these. Discuss
- 9. pH value of an alkaline solution is
Options- A. 7
- B. > 7
- C. < 7
- D. constant over a wide range Discuss
- 10. Pick out the wrong statement.
Options- A. One kg-mole of an ideal gas occupies 22.4 m3 at N.T.P.
- B. One lb-mole of an ideal gas occupies 359 ft3 at N.T.P.
- C. One gm-mole of an ideal gas occupies 22.4 litres (i.e., 22400 c.c) at N.T.P.
- D. Density of dry air at N.T.P. is 1 gm/litre. Discuss
Stoichiometry problems
Search Results
Correct Answer: Gibbs free energy
Correct Answer: V/2
Correct Answer: all (a), (b) & (c)
Correct Answer: the route/method through which final products are obtained.
Correct Answer: both(a)&(b)
Correct Answer: 1
Correct Answer: number of electrons.
Correct Answer: constitution of the solute.
Correct Answer: > 7
Correct Answer: Density of dry air at N.T.P. is 1 gm/litre.
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