|
1) Internal energy of a substance comprises of the _____________ energy? a. Vibrational b. Rotational c. Translational d. All A., B. & C.
|
||||
|
2) Specific gravity on API scale is given by the relation (where, G = specific gravity at 15.5°C) ? a. °API = 200(G – 1) b. °API = (141.5/G) – 131.5 c. °API = (140/G) – 130 d. °API = 145 – (145/G)
|
||||
|
3) A vapor whose partial pressure is less than its equilibrium vapor pressure is called the _____________ vapor? a. Saturated b. Superheated c. Unsaturated d. Dry gaseous
|
||||
|
4) An Azeotropic solution of two liquids has boiling point lower than either of them, when it_____________? a. Is saturated b. Is unsaturated c. Shows negative deviation from Raoult’s law d. Shows positive deviation from Raoult’s law
|
||||
|
5) For an ideal gas, the compressibility factor________________? a. Decreases with pressure rise b. Is unity at all temperature c. Is unity at Boyle’s temperature d. Zero
|
||||
|
6)
Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is__________________? a. 80.1°C b. Less than 80.1°C c. 100°C d. Greater than 80.1°C but less than 100°C
|
||||
|
7) 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___________________? a. Less than 100°C b. 100°C c. Between 100 and 110°C d. 110.6°C
|
||||
|
8) At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be_________________? a. Significantly less than 4.69 atm b. Nearly equal to 4.69 atm c. Significantly more than 4.69 atm d. Indeterminate due to lack of data
|
||||
|
9) In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is__________________? a. Independent of temperature b. Increases with rise in pressure c. Increased with decrease in pressure d. Unchanged with pressure changes
|
||||
|
10) 1 ata is equivalent to_________________? a. 1 atm b. 10 torr c. 0.98 Pascal d. 1 kgf/cm2
|
||||
|
11) Pick out the wrong statement? a. A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure b. A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a ‘superheated vapor’ c. The temperature at which a vapor is saturated is termed as the boiling point d. The difference between the existing temperature of a vapor and its saturation temperature (i.e.dew point) is called its ‘degree of superheat’
|
||||
|
12) Pick out the wrong statement? a. Heat capacity of a diatomic gas is higher than that of a monatomic gas b. Equal volumes of Argon and Krypton contain equal number of atoms c. Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 1023 d. The binary mixture of a particular composition in both vapor and liquid state is known as an azeotropic mixture
|
||||
|
13) Pick out the wrong statement ? a. ‘Reduced temperature’ of a substance is the ratio of its existing temperature to its critical temperature, both expressed on Celsius scale b. ‘Reduced pressure’ is the ratio of the existing pressure of a substance to its critical pressure c. ‘Reduced volume’ is the ratio of the existing molal volume of a substance to its critical molal volume d. None of these
|
||||
|
14) Pick out the wrong unit conversion of calorific value? a. 1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg b. 1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3 c. 1 BTU/lb = 2.3 kcal/kg d. 1 kcal/m3 = 0.1124 BTU/ft3
|
||||
|
15) Pick out the wrong statement? a. Ten times dilution of a normal solution (N) reduces its normality to N/10 b. When equal weights of oxygen and methane are mixed in an empty reactor at room temperature, then the fraction of total pressure exerted by the oxygen c. Volume occupied by 9.034 x 1023 atoms of oxygen in ozone (O3) at NTP will be 11200 c.c d. One kg mole of an ideal gas at N.T.P occupies 22400 Nm3
|
||||
|
16) Pick out the wrong statement? a. To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of soluti b. 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess c. A gas bubble at a pressure of Pg is passed through a solvent with a saturation vapour pressure of Ps. If the time of passage of the bubble is long and d. A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The s
|
||||
|
17) Pick out the wrong statement? a. Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve b. At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite c. Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture d. Clapeyron equation is given by dP/dT = (λ/T) (VG – VL); where, P = vapor pressure, T = absolute temperature, λ = latent heat of vaporisation, VG a
|
||||
|
18) The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΔH = – 394 kJ/kg .mole CO + ½ O2 = CO2, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole? a. -109.5 b. +109.5 c. +180 d. +100
|
||||
|
19) Which of the following is followed by an ideal solution ? a. Boyle’s law b. Amagat’s law c. Raoult’s law d. Trouton’s rule
|
||||
|
20) Heat of neutralisation of HCl and NaOH is – 57.46 kJ/Kg mole. The heat of ionisation of water will be _____________ kJ/Kg mole? a. 57.46 b. -57.46 c. 114.92 d. -28.73
|
||||
