Description : Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is always greater than that at constant volume `(q_(V))`.
Last Answer : Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is ... False. D. If both Assertion & Reason are false.
Description : Assertion :- In an isolated system the entropy increases due to spontanous process. Reason :- The processes in an isolated system are adiabatic.
Last Answer : Assertion :- In an isolated system the entropy increases due to spontanous process. Reason :- The ... D. If both Assertion & Reason are false.
Description : Pick out the wrong statement. (A) A catalyst does not alter the final position of equilibrium in a reversible reaction (B) A catalyst initiates a reaction (C) A catalyst is specific in reaction (D) A catalyst remains unchanged in chemical composition at the end the reaction
Last Answer : (B) A catalyst initiates a reaction
Description : In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (A) Increased (B) Decreased (C) Remains unchanged (D) Becomes zero
Last Answer : (C) Remains unchanged
Description : For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust (A) Is increased (B) Is decreased (C) Remains unchanged (D) Becomes zero
Last Answer : (B) Is decreased
Description : For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust (A) Is increased (B) Is decreased (C) Remains unchanged (D) Becomes zero
Description : With increase in calorific value of fuels, their adiabatic flame temperatures (A) Increase (B) Decrease (C) Remain unchanged (D) May increase or decrease; depends on the quantity of products of combustion
Last Answer : (D) May increase or decrease; depends on the quantity of products of combustion
Description : For an isothermal process, the internal energy of a gas (A) Increases (B) Decreases (C) Remains unchanged (D) Data insufficient, can't be predicted
Description : __________ temperature remains constant during adiabatic saturation process of unsaturated air. (A) Dew point (B) Dry bulb (C) Wet bulb (D) None of these
Last Answer : (C) Wet bulb
Description : It is a process during which the pressure remains constant a. Adiabatic b. Isentropic c. Isobaric d. Isotropic
Last Answer : Isobaric
Description : A process, in which the temperature of the working substance remains constant during its expansion or compression, is called A. isothermal process B. hyperbolic process C. adiabatic process D. polytropic process
Last Answer : Answer: A
Description : A heat exchange process in which the product of pressure and volume remains constant is known as (a) heat exchange process (b) throttling process (c) isentropic process (d) adiabatic process (e) hyperbolic process.
Last Answer : Answer : e
Description : Which of the following conditions indicates a short circuited capacitor when checking its condition with an ohmmeter? A. The capacitor shows charging, but the final resistance reading is appreciably less ... moves quickly to the low resistance side of the scale, then slowly recedes toward infinity.
Last Answer : Answer: B
Description : Write the following steps in sequential order to verify the laws of reflection. (A) Draw a normal at the point where the two lines PQ and `P_(1)Q_(1)`
Last Answer : Write the following steps in sequential order to verify the laws of reflection. (A) Draw a normal at the ... A. DABECF B. ACDBFE C. DECBAF D. DBACEF
Description : `Q_(10)` of light reaction is
Last Answer : `Q_(10)` of light reaction is A. temperature coefficient B. water coefficient C. respiratory coefficient D. none
Description : For a reaction `2X(s)+2Y(s)rarr 2Cl(l)+D(g)` The `q_(p)` at `27^(@)C` is -28 K Cal. `mol^(-1)`. The `q_(V)` is ___________ K. Cal. `mol^(-1)` :-
Last Answer : For a reaction `2X(s)+2Y(s)rarr 2Cl(l)+D(g)` The `q_(p)` at `27^(@)C` is -28 K Cal. `mol^(-1)`. The `q_( ... . `-27.4` B. `+27.4` C. `-28.6` D. `28.6`
Description : Pick out the wrong statement. (A) The net change in entropy in any reversible cycle is always zero (B) The entropy of the system as a whole in an irreversible process increases (C) The ... to a maximum (D) The entropy of a substance does not remain constant during a reversible adiabatic change
Last Answer : (D) The entropy of a substance does not remain constant during a reversible adiabatic change
Description : The body protein after eighteen years (A) Remains unchanged (B) Is decomposed only slightly at intervals of one month (C) Is in a constant state of flux (D) Is used only for energy requirement
Last Answer : Answer : C
Description : A catalyst remains unchanged at the end of the reaction with regard to (a) Quality (b) Chemical composition (c) Physical state (d) Quantity and chemical composition
Last Answer : Ans:(d)
Description : In the impact problems the following conditions must always be satisfied a.The total kinetic energy remains unchanged b.The total linear momentum remains unchanged c.The magnitude of the total linear ... is reduced by a factor proportional to the coefficient of restitution e.None of the above
Last Answer : b. The total linear momentum remains unchanged
Description : In a counter-current extractor, as the axial mixing increases, the extraction efficiency (A) Increases (B) Decreases (C) Remains unchanged (D) Depends on the pressure of the system
Last Answer : (B) Decreases
Description : The boiling points of pure components of a binary system __________ with increase in total pressure of the system. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease, depends on the system
Last Answer : (B) Increases
Description : Assertion :- Nitrous acid `(HNO_(2))` may act as an oxidising agent as well as a reducing agent. Reason :- The oxidation number of Nitrogen remains sa
Last Answer : Assertion :- Nitrous acid `(HNO_(2))` may act as an oxidising agent as well as a reducing agent. ... False. D. If both Assertion & Reason are False.
Description : Read the assertion and reason carefully to mark the correct option in question. Assertion: Golgi apparatus remains in close association with the endop
Last Answer : Read the assertion and reason carefully to mark the correct option in question. Assertion: Golgi apparatus ... . If both Assertion & Reason are false.
Description : Assertion When a charged particle moves perpendicular to a uniform magnetic field then its momentum remains constant. Reason Magnetic force acts perpe
Last Answer : Assertion When a charged particle moves perpendicular to a uniform magnetic field then its momentum ... Assertion is false but Reason is true.
Description : Assertion (A): In anti-friction bearings, the frictional resistance is very low as the shaft held by it remains in floating condition by the hydrodynamic pressure developed by the lubricant. [IES-2006] Reason (R): In hydrodynamic ... of A (c) A is true but R is false (d) A is false but R is true
Last Answer : (d) A is false but R is true
Description : Assertion (A): In equilibrium position, the journal inside a journal bearing remains floating on the oil film. [IES-1995] Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the ... explanation of A (c) A is true but R is false (d) A is false but R is true
Last Answer : (b) Both A and R are individually true but R is not the correct explanation of A
Description : Assertion (A): In steady rotating condition the journal inside a hydrodynamic journal bearing remains floating on the oil film. [IES-2008] Reason (R): The hydrodynamic pressure developed in steady rotating conditions in journal ... A (c) A is true but R is false (d) A is false but R is true
Last Answer : (a) Both A and R are true and R is the correct explanation of A
Description : A gas is allowed to expand reversibly under adiabatic conditions. What is zero for such a process ?
Last Answer : A gas is allowed to expand reversibly under adiabatic conditions. What is zero for such a process ? A. `Delta G ... C. `Delta S = 0` D. None of these
Description : Why entropy change for a reversible adiabatic process is zero ?
Last Answer : Because there is no heat transfer in this process.
Description : Specific heat of a gas for a reversible adiabatic process is (A) Negative (B) Zero (C) Infinity (D) None of these
Last Answer : (B) Zero
Description : Entropy change in case of reversible adiabatic process is (A) Minimum (B) Zero (C) Maximum (D) Indeterminate
Description : Pick out the wrong statement: (A) The expansion of a gas in vacuum is an irreversible process (B) An isometric process is a constant pressure process (C) Entropy change for a reversible adiabatic process is zero (D) Free energy change for a spontaneous process is negative
Last Answer : (B) An isometric process is a constant pressure process
Description : During the adiabatic process, which of the following is the change in entropy? a. zero b. greater than zero c. less than zero d. infinity
Last Answer : zero
Description : The boiling of water into steam in an open container is an example of a/an _________ process. a. adiabatic b. isochoric c. isobaric d. zero work
Last Answer : isobaric
Description : During adiabatic, internally reversible process, what is true about the change in entropy? A. It is temperature-dependent B. It is always greater than zero C. It is always zero D. It is always less than zero
Last Answer : It is always zero
Description : How does an adiabatic process compare to an isentropic process? A. Adiabatic heat transfer is not equal to zero; isentropic heat transfer is zero B. Both heat transfer = 0; isentropic: reversible ... is not equal to zero D. Both heat transfer is not equal to zero; isentropic: irreversible
Last Answer : Both heat transfer = 0; isentropic: reversible
Description : For reversible adiabatic process, change in entropy is (a) maximum (b) minimum (c) zero (d) unpredictable (e) negative
Last Answer : Answer : c
Description : If a radioactive sample has decayed until only one eighth of the original sample remains unchanged how many half-lives have elapsed?
Last Answer : 3
Description : The rating of the Transformer __ when the supply frequency is increased: a) Remains unchanged b) Increases c) Decreases d) None of the above
Last Answer : Ans: B
Description : As the amount of clay in a soil increases, its water retaining capacity _____ 30 A. Increases B. Decreases C. Remains unchanged D. None of Above
Last Answer : ANSWER: A
Description : With increasing bond order, stability of a bond (a) Decreases (b) Increases (c) Remains unchanged (d) None of these
Last Answer : Ans:(b)
Description : When price of a substitute of commodity falls, the demand for - (1) falls (2) remains unchanged (3) increases at increasing rate (4) rises
Last Answer : (1) falls Explanation: Cross Price Effect refers to effect on the demand for a given commodity due to a change in the price of a substitute commodity. A change (increase or decrease) in the ... the given commodity (tea) also decreases. It shifts the demand curve of the given commodity towards left.
Description : In the periodic table of elements, on moving from left to right across a period, the atomic radius – (1) decreases (2) increases (3) remains unchanged (4) does not follow a definite pattern
Last Answer : (1) decreases Explanation: The atomic radius is the distance from the atomic nucleus to the outermost stable electron orbital in an atom that is at equilibrium. It tends to decrease across a period from ... usually increases while going down a group due to the addition of a new energy level (shell).
Description : What is the quantity that remains unchanged in a transformer?
Last Answer : Frequency
Description : During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water. (A) Decreases (B) Increases (C) Remains unchanged (D) Decreases linearly
Description : Production rate __________ with increased fineness, with a given energy input to the size reduction machine. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the machine
Last Answer : (A) Decreases
Description : With increase in the capacity of screens, the screen effectiveness (A) Remains unchanged (B) Increases (C) Decreases (D) Decreases exponentially
Last Answer : (C) Decreases
Description : As the impurities are oxidised, the melting point of iron (A) Decreases (B) Remains unchanged (C) Increases (D) May increase or decrease; unpredictable
Last Answer : (C) Increases
Description : With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature). (A) Increases (B) Remains unchanged (C) Decreases (D) Decreases linearly
Last Answer : (A) Increases