Stoichiometry

201. Molality is defined as the number of gm moles of solute per _________ of solvent.

1. Litre
2. kg
3. gm.mole
4. gm

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202. Molar heat capacity of water in equilibrium with ice at constant pressure is

1. 0
2. ∞
3. 1
4. None of these

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203. N.T.P. corresponds to

1. 1 atm absolute pressure & 0°C
2. 760 mm Hg gauge pressure & 0°C
3. 760 torr & 15°C
4. 101.325 KPa gauge pressure & 0°C

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204. N₂ content in a urea sample was found to be only 42%. What is the actual urea content of the sample? (Molecular weight of urea = 60)

1. 80%
2. 90%
3. 95%
4. 98%

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205. Na₂SO4. 10H₂O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na₂SO₄. The final concentration of the solute in the solution is 10%. The weight of crystals is

1. 20
2. 32.2
3. 45.35
4. 58.65

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206. NaOH contains _________ percent oxygen.

1. 1
2. 10
3. 16
4. 40

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207. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules

1. Collide without loss of energy
2. Do work equal to loss in kinetic energy
3. Are above the inversion temperature
4. Exert no attractive force on each other

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208. Normality of a solution does not change with the increase in the

1. Pressure
2. Temperature
3. Solute concentration
4. Dilution of the solution

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209. Number of gm moles of solute dissolved in 1 kg of solvent is called its

1. Normality
2. Molarity
3. Molality
4. Formality

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210. Number of gm moles of solute dissolved in one litre of a solution is called its

1. Equivalent weight
2. Molarity
3. Molality
4. Normality

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