## Friday, February 22, 2019

### Stoichiometry (Objective Questions With Answers)

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01. 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)
(A) 4480
(B) 2240
(C) 1120
(D) 0.4

02. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a
__________ vapor.
(A) Saturated
(B) Supersaturated
(C) Superheated
(D) None of these

03. Dissolving a solute in a solvent does not change its
(A) Specific heat
(B) Vapour pressure
(C) Viscosity
(D) None of these

04. Applicability of Clausius-Clapeyron Equation is subject to the condition that the
(A) Vapor follows ideal gas law
(B) Volume in the liquid state is negligible
(C) Both (A) & (B)
(D) Neither (A) nor (B)

05. 'Cox' chart which is useful in the design of a distillation column (particularly suitable for
petroleum hydrocarbons) is a plot of the
(A) Temperature vs. log (vapor pressure)
(B) Vapor pressure vs. log (temperature)
(C) Log (temperature) vs. log (vapor pressure)
www.objectivebooks.com
(D) Vapor pressure vs. temperature

06. The reaction A + B → C has been conducted in a reactor as shown below. The number of
boundaries around which material balance can be written, are
(A) 1
(B) 6
(C) 3
(D) 4

07. Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The
number of additional specifications required to determine the product flow rate and
composition is
(A) 0
(B) 1
(C) 2
(D) 3

08. The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 ×
__________.
(A) 1026
(B) 1023
(C) 1020
(D) 1019

09. Concentration of a solution expressed in terms of __________ is independent of temperature.
(A) Molarity
(B) Normality
(C) Molality
(D) None of these

10. The amount of Zn (atomic weight = 65) required to form 224 c.c. of H2 at N.T.P. on
treatment with dilute H2SO4will be __________ gm.
(A) 0.065
(B) 0.65
(C) 6.5
(D) 65