Stoichiometry Quiz 6
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The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ?H = ? 394 kJ/kg .mole CO + ? O2 = CO2, ?H = ? 284.5 kJ/kg. mole. The heat of formation of CO is ______ kJ/kg. mole?
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The quantity of heat required to evaporate 1 kg of a saturated liquid is called ___________?
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The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are___________?
4 / 50
The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour_________?
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The heat of adsorption of a gas caused by Van der Waals forces of attraction and capillarity is equal to the heat of___________?
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The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation__________?
7 / 50
Specific gravity on API scale is given by the relation (where, G = specific gravity at 15.5?C) ?
8 / 50
The boiling points for pure water and pure toluene are 100?C and 110.6?C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is_____?
9 / 50
The heat capacity of most substances is greater for the ________ state?
10 / 50
The elevation in boiling point of a solution is proportional to the _______ of the solution?
11 / 50
The latent heat of vaporisation___________?
12 / 50
The heat capacity of a substance is ______?
13 / 50
The average translational kinetic energy with which a gas molecule is endowed is dependent on its___________?
14 / 50
The chemical nature of an element is independent of_________?
15 / 50
The maximum adiabatic flame temperature of fuels in air is _____ the maximum flame temperature in pure oxygen?
16 / 50
The atomic heat capacities of all solid elements _______ with decrease in temperature?
17 / 50
The evaporation of aqueous solution of sugar causes its molarity to___________?
18 / 50
The pressure of ?V? litres of a dry gas is increased from 1 to 2 kgf/cm2 at a constant temperature. The new volume will become_____?
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The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be________?
20 / 50
The depression in freezing point of a solution is_________?
21 / 50
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__________?
22 / 50
The osmotic pressure of a solution increases, if its ______ is decreased?
23 / 50
The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal ______ in the two phases?
24 / 50
The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is ______ kg mole?
25 / 50
The crystallisation of a solute from a solution may be done by_________?
26 / 50
The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the________?
27 / 50
The heat evolved in the combustion of benzene is represented by the equation: C6H6 + 7.5 O2 = 6CO2 + 3H2O, ?H = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be ______ kJ/kgmole?
28 / 50
The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas)?
29 / 50
The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the_____?
30 / 50
Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the__________?
31 / 50
The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is_______?
32 / 50
The density of a liquid is 1500 kg/m3. Its value in gin/litre will be equal to_________?
33 / 50
The density of a gas at N.T.P.is ???. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ? 0.75 ? at a temperature of _____ ?K?
34 / 50
Test piece for determination of RUL of a refractory is heated in a/an___________?
35 / 50
The increase in the temperature of the aqueous solution will result in decrease of its_________?
36 / 50
The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is_________?
37 / 50
The OH- concentration in a solution having pH value 3 is______?
38 / 50
The equilibria relations in a multi-component and multiphase system cannot be calculated with the help of the________?
39 / 50
The density of a gas ?X? is twice that of another gas ?Y?. If the molecular weight of gas ?Y? is ?M?; then the molecular weight of the gas ?X? will be_________?
40 / 50
The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_______?
41 / 50
The effect of pressure on the heat capacity of the gases _______ is negligible?
42 / 50
The reaction A + B ? C has been conducted in a reactor as shown below. The numbers of balances (material) that can be made around the reactor are_________?
43 / 50
The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be ______ times?
44 / 50
The hydroxyl ion (OH-) concentration in a solution having pH value 3 will be__________?
45 / 50
The heat of solution depends upon the______?
46 / 50
The rate of material ______ is zero in case of a steady state system?
47 / 50
The most convenient way of expressing solution concentration is in terms of_____?
48 / 50
The equilibrium data of component A in the two phases B and C are given below. The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is ______?
49 / 50
The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be_______?
50 / 50
The heat change for the reaction, C(s) + 2S(s) ? CS2(l), is 104.2 kJ. It represents the heat of__________?
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