Stoichiometry

211. Number of gram equivalent of solute dissolved in one litre of solution is called its

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

Correct answer: (A)
Normally

212. On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes

  1. 1
  2. 8
  3. 4
  4. 2

Correct answer: (C)
4

213. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is _________ gm.

  1. 82
  2. 164
  3. 41
  4. 8.2

Correct answer: (A)
82

214. One 'Therm' is equivalent to

  1. 105 BTU
  2. 105 kcal
  3. 109 BTU
  4. 109 kcal

Correct answer: (A)
105 BTU

215. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The amount of water vapour condensed (in kg) is

  1. 0
  2. 0.065
  3. 0.1
  4. 1

Correct answer: (B)
0.065

216. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The latent heat of condensation (kJ/kg-1 ) under these conditions is

  1. 40732
  2. 2676
  3. 2263
  4. 540

Correct answer: (C)
2263

217. One micron is equal to

  1. 10-4 mm
  2. 10-4 cm
  3. 10-6 m
  4. Both (B) & (C)

Correct answer: (D)
Both (B) & (C)

218. One micron is equal to _________ cm.

  1. 10-2
  2. 10-4
  3. 10-6
  4. 10-8

Correct answer: (B)
10-4

219. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

  1. 0.19
  2. 0.33
  3. 0.4
  4. 0.67

Correct answer: (A)
0.19

220. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

  1. 1225
  2. 1335
  3. 1525
  4. 1735

Correct answer: (D)
1735

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