The value of NA/(NA + NB), for steady state equimolal counter diffusion
of two gases 'A' and 'B' is
(A) 1
(B) ∞
(C) 0.5
Description : The value of NA/(NA + NB) for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is (A) 1 (B) ∞ (C) 0.5 (D) 2
Last Answer : (A) 1
Description : Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is ... reflux in case of distillation operation requires infinite number of plates for a binary system separation
Last Answer : (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion
Description : Steady state equimolal counter diffusion occurs in case of (A) Leaching (B) Absorption (C) Binary phase distillation (D) Liquid-liquid extraction
Last Answer : (C) Binary phase distillation
Description : Steady state equimolal counter diffusion is encountered in (A) Separation of a binary mixture by distillation (B) Absorption of NH3 from air by water (C) All liquid-liquid diffusion systems (D) All liquid-solid diffusion systems
Last Answer : (A) Separation of a binary mixture by distillation
Description : The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 - PA2 ) is for (A) Fick's second law of diffusion (B) Steady state diffusion for stagnant case (C) Liquid M.T.C. by Higbie penetration theory (D) None of these
Last Answer : (B) Steady state diffusion for stagnant case
Description : Pick out the wrong statement. (A) The mole fraction of solute is directly proportional to the molality of a 'dilute' solution (B) For a non-reacting binary mixture of ideal gases, the partial ... at all temperature (D) The relative volatility of a binary mixture at the Azeotropic composition is 1
Last Answer : (C) Azeotropes obey Raoult's law at all temperature
Description : Component A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular diffusion, if (A) Mass transfer is accompanied by reaction (B ... stagnant medium B (C) Molecular mean free path is high (D) There is equimolar counter diffusion
Last Answer : (D) There is equimolar counter diffusion
Description : The effectiveness factor for large value of Thiele modulus [L√(K/D1 )] of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm2 /second). (A) L √(K/D1 ) (B) 1/[L√(K/D1 )] (C) 1 (D) ∞
Last Answer : (B) 1/[L√(K/D1 )]
Description : The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving ... (C) Kc = Kp . RT = Km . RT/p (D) None of these
Last Answer : (C) Kc = Kp . RT = Km . RT/p
Description : If Thiele modulus is __________, then the pore diffusion resistance in a catalyst may be considered as negligible. (A) 0 (B) ∞ (C) < 0.5 (D) > 0.5
Last Answer : (C) < 0.5
Description : Given the following two statements: A. L = {w|na(w) = nb(w)} is deterministic context free language, but not linear B. L = {an bn} U {an b2n} is linear, but not deterministic context free language. Which of the following ... are true. (3) (A) is true, (B) is false. (4) (A) is false, (B) is true.
Last Answer : Both (A) and (B) are true.
Description : Given the following two languages: L1 = {anbn|n≥0, n≠100} L2 = {w ϵ {a,b,c}*| na(w) = nb(w) = nc(w)} Which of the following options is correct? (1) Both L1 and L2 are ... context free language, L2 is not context free language. (4) L1 is not context free language, L2 is context free language.
Last Answer : L1 is context free language, L2 is not context free language.
Description : The grammar with production rules S → aSb |SS|λ generates language L given by: (A) L = {w∈{a, b}* | na(w) = nb(w) and na(v) ≥ nb(v) where v is any prefix of w} (B) L = {w∈{a, b}* | na(w) = nb(w) and na(v ... (D) L = {w∈{a, b}* | na(w) ≠ nb(w) and na(v) ≤ nb(v) where v is any prefix of w}
Last Answer : (A) L = {w∈{a, b}* | na(w) = nb(w) and na(v) ≥ nb(v) where v is any prefix of w}
Description : The transition function for the language L = {w|na(w) and nb(w) are both odd} is given by: δ(q0, a)=q1 ; δ(q0, b)=q2 δ(q1, a)=q0 ; δ(q1, b)=q3 δ(q2, a)=q3 ; δ(q2, b ... the automata are: (A) q0 and q0 respectively (B) q0 and q1 respectively (C) q0 and q2 respectively (D) q0 and q3 respectively
Last Answer : (D) q0 and q3 respectively
Description : In a liquid-liquid heat exchanger, for the same process temperature, the ratio of the LMTD in parallel flow to the LMTD in counter flow is always (A) < 1 (B) > 1 (C) 1 (D) ∞
Last Answer : (A) < 1
Description : In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞
Last Answer : (D) ∞
Description : In an ideal P.F.R. at steady state conditions (A) The composition of reactants remains constant along a flow path (B) The conversion of the reactant varies from point to point along a flow path (C) There is no lateral mixing of fluid (D) There may be diffusion along the flow path
Last Answer : (B) The conversion of the reactant varies from point to point along a flow path
Description : Colebrook equation for friction factor in turbulent flow is given by, f -0.5 = -4 loge [(ε/D) + (1.26/NRe √F). It reduces to Nikuradse equation for a value of (ϵ/D) equal to (A) 0 (B) 1 (C) ∞ (D) 0.5
Last Answer : (B) 1
Description : Binary distillation involves the mass transfer by __________ at the gasliquid interface. (A) Unidirectional diffusion from liquid to gas phase (B) Unidirectional diffusion from gas to liquid phase (C) Either 'a' or 'b' (D) A counter diffusion at an almost equal molar rate
Last Answer : (D) A counter diffusion at an almost equal molar rate
Description : Pick out the wrong statement. (A) The Reynolds analogy for mass transfer is given by Lewis relation and is applicable, when Schmidt number is one (B) Sherwood number for flow in pipes can be expressed ... flux of a component A in binary mixture of A and B is given by - Dab'.dCA/dz
Last Answer : (C) According to film theory for equimolar counter diffusion, the mass transfer coefficient is given by DAB(B)P - 3, Q - 2
Description : In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive (a) K+ into the cell (b) K+ and Na+ out of the cell (c) Na+ into the cell (d) Na+ out of the cell.
Last Answer : c) Na+ into the cell
Description : At what value of reflux ratio, number of theoretical plates in a distillation column is minimum? (A) 0 (B) 1 (C) ∞ (D) < 1
Last Answer : (C) ∞
Description : For an ideal plug flow reactor, the value of Peclet number is (A) 0 (B) 1 (C) 10 (D) ∞
Last Answer : (A) 0
Description : The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞ 0 E.dt is (A) 0 (B) 1 (C) ∞ (D) √2π
Description : The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is (A) ∞ (B) 1 (C) 0 (D) -ve
Last Answer : (C) 0
Description : What is the value of Joule-Thomson co-efficient for an ideal gas? (A) +ve (B) -ve (C) 0 (D) ∞
Description : Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is (A) 0 (B) ∞ (C) +ve (D) -ve
Description : What is the value of entropy at 273°K? (A) 0 (B) 1 (C) ∞ (D) None of these
Last Answer : Option A
Description : Electric field strength on a dust particle having charge equal to 8 × 10- 19 when plates are separated by distance of 2 cm and have a potential difference of 5 kV is A. 2.0 × 10-13 N B. 3 N C. 5 N D. 20 N
Last Answer : 2.0 × 10-13 N
Description : Consider the following statements: 1. When a nerve fibre is stimulated, a profound change is produced in the electrical properties of surface membrane and in steady potential. 2. Upon excitation, the resting potentialis suddenly changed. 3. It is due ... 1, 2, 3 (b) 2, 3 (c) 1, 2, 3, 4 (d) 1, 2, 4
Last Answer : Ans:(d)
Description : Pick out the wrong statement. (A) The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere (B) ... ) The earth's atmosphere is an envelope of gases extending upto a height of about 200 kms
Last Answer : (A) The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere
Description : The sugar absorbed by fac i l itated diffusion and requiring Na independent transporter is (A) Glucose (B) Fructose (C) Galactose (D) Ribose
Last Answer : Answer : B
Description : The primary force moving water molecules from the blood plasma to the interstitial fluid is a. active transport b. cotransport with H+ c. facilitated diffusion d. cotransport with Na+ e. filtration
Last Answer : filtration
Description : The success of oral rehydration therapy of diarrhoea depends upon the following process in the intestinal mucosa: A. Sodium pump mediated Na+ absorption B. Glucose coupled Na+ absorption C. Bicarbonate coupled Na+ absorption D. Passive Na+ diffusion secondary to nutrient absorption
Last Answer : B. Glucose coupled Na+ absorption
Description : What is symport ? (a) Counter transport (b) Contransport (c) Carrier mediated diffusion (d) Solvent drug
Last Answer : Ans: B
Description : If two functions A and B are discrete, their Green’s value for a region of circle of radius a in the positive quadrant is a) ∞ b) -∞ c) 0 d) Does not exist
Last Answer : d) Does not exist
Description : In the equation, PVn = constant, if the value of n = ± ∞, then it represents a reversible __________ process. (A) Adiabatic (B) Isometric (C) Isentropic (D) Isothermal
Last Answer : (B) Isometric
Description : Boyle’s law i.e. pV = constant is applicable to gases under (a) all ranges of pressures (b) only small range of pressures (c) high range of pressures (d) steady change of pressures (e) atmospheric conditions.
Last Answer : Answer : b
Description : What is the full form of 'NB:' ? -How To ?
Last Answer : The full form of 'NB:' is Nota Bene (Note Well)
Description : What is the atomic number of Nb ?
Last Answer : The atomic number of Nb is 41
Description : What is the full form of NB ?
Last Answer : Take Notice Of Note Well (not a bene) .
Last Answer : NB - Note Bene, Note Well
Description : WHAT is the electronic configuration of Nb?
Last Answer : Nb or niobium has the electron configuration of [Kr]4d45s1
Description : What is the battery life of the Canon NB-4L?
Last Answer : The average better life of the Canon NB-4L can range anywhere between 3-5 years depending on use and storage. A replacement will only run you 12 dollars.
Description : _______ isnormally referred toas mB/nB coding; it replaceseach m-bit group with an n-bit group. A) Block coding B) Line coding C) Scrambling
Last Answer : Block coding
Description : Which of the following is a cephalosporin? A.Cephalosporin N B.Synnematin C.Cephalosporin C D.All of these
Last Answer : .All of these
Description : Which one out of these is not LPWAN technologies: a) SigFox b) WiFi c)NB-oT d) LoRa
Last Answer : b) WiFi
Description : What is the selectivity index, if the grade of tailings & concentrate is the same? (A) 0 (B) ∞ (C) 1 (D) 0.5
Last Answer : (C) 1
Description : Absorptivity and reflectivity of a perfect black body are respectively (A) 1 and 0 (B) 0 and 1 (C) 1 and ∞ (D) 0 and 0.5
Last Answer : (A) 1 and 0