Stoichiometry

181. In the reaction, Ca + 2H₂O = Ca(OH)₂ + H₂; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40)

1. 4480
2. 2240
3. 1120
4. 0.4

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182. In the reaction, represented by Na₂CO₃ + HC1 → NaHO3 + NaCl, the equivalent weight of Na₂CO₃ is

1. 53
2. 5.3
3. 106
4. 10.6

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183. In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?

1. 30 c.c acid and 30 c.c base
2. 20 c.c acid and 25 c.c base
3. 15 c.c acid and 35 c.c base
4. 35 c.c acid and 15 c.c base

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184. Increasing the temperature of an aqueous solution will cause decrease in its

1. Molality
2. Mole fraction
3. Weight percent
4. Molarity

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185. Internal energy is independent of the _________ for an ideal gas.

1. Pressure
2. Volume
3. Both (A) & (B)
4. Neither (A) nor (B)

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186. Internal energy of a substance comprises of the _________ energy.

1. Vibrational
2. Rotational
3. Translational
4. All (A), (B) & (C)

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187. Isotonic solutions must have the same

1. Viscosity
2. Molar concentration
3. Normality
4. Critical temperature

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188. Isotopes are atoms having the same

1. Mass number
2. Number of neutrons
3. Atomic mass
4. None of these

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189. Kinematic viscosity of 1 m² /second is equivalent to _________ stokes.

1. 10
2. 102
3. 103
4. 104

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190. Kinetic theory of gases stipulates that, the

1. Energy is lost during molecular collisions
2. Molecules possess appreciable volume
3. Absolute temperature is a measure of the kinetic energy of molecules
4. None of these

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