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Navbodh Chemistry Class 11. We covered all the Navbodh Chemistry Class 11 in this post for free so that you can practice well for the exam.
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Navbodh Chemistry Class 11 Objective for Students
For an ideal equimolar (1 : 1) mixture of benzene and toluene maintained at 25°C, which statement correctly describes the composition of the vapour phase? (Vapour pressures at 25°C: benzene = 12.8 kPa, toluene = 3.85 kPa)
a) The vapour phase will be richer in toluene
b) The vapour phase will contain equal proportions of benzene and toluene
c) The given data are insufficient to predict the vapour composition
d) The vapour phase will be richer in benzene
Option d – The vapour phase will be richer in benzene
The van’t Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is
a) 0
b) 1
c) 2
d) 3
Option d – 3
A gas such as carbon monoxide most closely follows the ideal gas equation under which conditions?
a) High temperature and low pressure
b) Low temperature and high pressure
c) High temperature and high pressure
d) Low temperature and low pressure
Option a – High temperature and low pressure
What is the mole fraction of the solute in a 1.00 molal aqueous solution?
a) 0.177
b) 1.770
c) 0.0354
d) 0.0177
Option d – 0.0177
Which of the following liquid mixtures exhibits a positive deviation from Raoult’s law?
a) Chloroethane and bromoethane
b) Ethanol and acetone
c) Benzene and toluene
d) Acetone and chloroform
Option b – Ethanol and acetone
Which of the following combinations forms a maximum boiling azeotrope?
a) Ethanol and water
b) Acetone and carbon disulfide
c) Heptane and octane
d) Water and nitric Acid
Option d – Water and nitric Acid
Which concentration term varies with temperature?
a) Molality
b) Molarity
c) Mole fraction
d) Mass percentage
Option b – Molarity
If the molality of a dilute solution is doubled, the value of the molal depression constant (K₂) becomes
a) Twice its original value
b) Half its original value
c) Three times its original value
d) Unchanged
Option d – Unchanged
We covered all the Navbodh Chemistry Class 11 above in this post for free so that you can practice well for the exam.
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Also, check out:
- Balaji Publication Chemistry Class 11
- Chemistry Lesson Plan in Hindi
- Pharmaceutical Chemistry 2 Model Answer Paper
