ALL Questions
When a system is taken from state i to state f along the path iaf, it is found that Q = 50 cal and W = 20 cal. Along the path ibf Q = 36 cal. W along the path ibf is
When a system is taken from state i to state f along the path iaf, it is found that Q = 50 cal and W = 20 cal. Along the path ibf Q = 36 cal. W along the path ibf is
Two rigid boxes containing different ideal gases are placed on a table. Box A contains one mole of nitrogen at temperature T0, while Box B contains one mole of helium at temperature (7/3) T0. The boxes are then put into thermal contact with each other and heat flows between them until the gases reach a common final temperature. (Ignore the heat capacity of boxes). Then, what will be the final temperature of the gases, Tf, in terms of T0?
Two rigid boxes containing different ideal gases are placed on a table. Box A contains one mole of nitrogen at temperature T0, while Box B contains one mole of helium at temperature (7/3) T0. The boxes are then put into thermal contact with each other and heat flows between them until the gases reach a common final temperature. (Ignore the heat capacity of boxes). Then, what will be the final temperature of the gases, Tf, in terms of T0?
The work of 146 kJ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by 7ºC. The gas is (R = 8.3 J mol-1 K-1)
The work of 146 kJ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by 7ºC. The gas is (R = 8.3 J mol-1 K-1)
A gaseous mixture consists of 16 g of helium and 16 g of oxygen. What is the ratio Cp / Cv Vof the mixture?
A gaseous mixture consists of 16 g of helium and 16 g of oxygen. What is the ratio Cp / Cv Vof the mixture?
A system goes from A to B via two processes I and II as shown in the below figure. If and are the changes in internal energies in the processes I and II respectively, then
A system goes from A to B via two processes I and II as shown in the below figure. If 
and 
are the changes in internal energies in the processes I and II respectively, then
The temperature entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is
The temperature entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is
Which of the following is incorrect regarding the first law of thermodynamics?
Which of the following is incorrect regarding the first law of thermodynamics?
Two thermally insulated vessels 1 and 2 are filled with air at temperatures (T1, T2 ), volume (V1, V2 ), and pressure (P1, P2 ), respectively. If the valve joining the two vessels is opened, the temperature inside the vessel at equilibrium will be
Two thermally insulated vessels 1 and 2 are filled with air at temperatures (T1, T2 ), volume (V1, V2 ), and pressure (P1, P2 ), respectively. If the valve joining the two vessels is opened, the temperature inside the vessel at equilibrium will be
Which of the following statements is correct for any thermodynamic system?
Which of the following statements is correct for any thermodynamic system?
Which of the following statements is correct for any thermodynamic system?
Which of the following statements is correct for any thermodynamic system?
Which of the following statements is correct for any thermodynamic system?
Which of the following statements is correct for any thermodynamic system?
One mole of ideal monoatomic gas is mixed with one mole of diatomic gas . What is for the mixture? Note: denotes the ratio of specific heat at constant pressure, to that at constant volume.
One mole of ideal monoatomic gas 
is mixed with one mole of diatomic gas 
. What is 
for the mixture?
Note: denotes the ratio of specific heat at constant pressure, to that at constant volume.
A Carnot engine takes 3 × 106 cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. What is the work done by the engine?
A Carnot engine takes 3 × 106 cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. What is the work done by the engine?
Which of the following parameters does not characterize the thermodynamic state of matter? temperature / pressure / work / volume
Which of the following parameters does not characterize the thermodynamic state of matter?
temperature / pressure / work / volume
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio for the gas is
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio 
for the gas is
Heat cannot by itself flow from a body at lower temperature to a body at the higher temperature, is a statement or consequence of
Heat cannot by itself flow from a body at lower temperature to a body at the higher temperature, is a statement or consequence of
1 mole of a gas with = 7/5 is mixed with 1 mole of a gas with = 5/3, then what is the value of for the resulting mixture?
1 mole of a gas with 
= 7/5 is mixed with 1 mole of a gas with = 5/3, then what is the value of for the resulting mixture?
Even Carnot engine cannot give 100% efficiency because we cannot
Even Carnot engine cannot give 100% efficiency because we cannot
At what temperature is the r.m.s. velocity of a hydrogen molecule is equal to that of an oxygen molecule at 47°C?
At what temperature is the r.m.s. velocity of a hydrogen molecule is equal to that of an oxygen molecule at 47°C?
Cooking gas containers are kept in a lorry moving with uniform speed. What will be the temperature of the gas molecules inside?
Cooking gas containers are kept in a lorry moving with uniform speed. What will be the temperature of the gas molecules inside?
Which statement is incorrect?
Which statement is incorrect?
Heat given to a body which raises its temperature by 1°C is
Heat given to a body which raises its temperature by 1°C is
An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V1 and contains ideal gas at pressure P1 and temperature T1. The other chamber has volume V2 and contains ideal gas at pressure P2 and temperature T2. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be
An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V1 and contains ideal gas at pressure P1 and temperature T1. The other chamber has volume V2 and contains ideal gas at pressure P2 and temperature T2. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be
Area bounded by the curve y = x + sinx and its inverse function between the ordinates x = 0 and in sq. units is
Area bounded by the curve y = x + sinx and its inverse function between the ordinates x = 0 and 
in sq. units is
Area of the region bounded by y = |x| and y = 1 - |x| in sq. units is
Area of the region bounded by y = |x| and y = 1 - |x| in sq. units is
Area of the region bounded by y = |x| and y=2 in sq. units is
Area of the region bounded by y = |x| and y=2 in sq. units is
The area bounded by , axis of abscissa and two ordinates corresponding to two points of minima of the function y = f(x) is
The area bounded by 
, axis of abscissa and two ordinates corresponding to two points of minima of the function y = f(x) is
The area bounded by and is
The area bounded by 
and 
is
The area enclosed between the curve and the co-ordiante axes is
The area enclosed between the curve 
and the co-ordiante axes is
The area (in square units) of the region bounded by is
The area (in square units) of the region bounded by
is
The area bounded between the parabolas and , and the straight line y = 2 is
The area bounded between the parabolas 
and 
, and the straight line y = 2 is
The area bounded by the curves and is
The area bounded by the curves 
and 
is
The area bounded by the curves y=cosx and y=sin x between the ordinates x=0 and
The area bounded by the curves y=cosx and y=sin x between the ordinates x=0 and
The area under the curve with boundaries as X-axis and the ordinates x = 0, x = 3 in sq. units is
The area under the curve 
with boundaries as X-axis and the ordinates x = 0, x = 3 in sq. units is
The area (in square units) bounded by the curves , x-axis and lying in the first quadrant is
The area (in square units) bounded by the curves 
, x-axis and lying in the first quadrant is
A body is thrown vertically up to reach its maximum height in t seconds. The total time from the time of projection to reach a point at half of its maximum height while returning (in seconds) is
Calculate rms speed of O2 at 273 K and 1 *10^5Pa pressure. The density of O2 under these conditions is 1.42 kg m–3.
Calculate rms speed of O2 at 273 K and 1 * 10^5Pa pressure. The density of O2 under these conditions is 1.42 kg m–3.
Calculate the pressure exerted on the walls of a 3 litre flask when 7 gms of N2 are introduced into the same at 27°C.
Calculate the pressure exerted on the walls of a 3 litre flask when 7 gms of N2 are introduced into the same at 27°C.
Explain the following a) Although Au is soluble in aqua-regia, Ag is not b) Zinc and hot copper is used for recovery of Ag from the complex [Ag(CN)2]– c) Aluminium metal is frequently used as a reducing agent for extraction of metal such as chromium manganese etc. d) Partial roasting of sulphide ore is done in the metallurgy of copper.
Explain the following
a) Although Au is soluble in aqua-regia, Ag is not
b) Zinc and hot copper is used for recovery of Ag from the complex [Ag(CN)2]–
c) Aluminium metal is frequently used as a reducing agent for extraction of metal such as chromium manganese etc.
d) Partial roasting of sulphide ore is done in the metallurgy of copper.
Cinnabar (HgS) and galena (PbS) on roasting often gives their respective metals but zinc blende (ZnS) does not. Explain.
Cinnabar (HgS) and galena (PbS) on roasting often gives their respective metals but zinc blende (ZnS) does not. Explain.
Aluminium cannot be prepared by the electrolysis of aqueous solution of its salts. Why?
Aluminium cannot be prepared by the electrolysis of aqueous solution of its salts. Why?
Write short notes on Amalgamation , Hydrometallurgy, Self reduction, Electrolytic reduction?
Write short notes on Amalgamation , Hydrometallurgy, Self reduction, Electrolytic reduction?
If two tangents drawn from a point P to the parabola y2 = 4x are at right angles, then the locus of P is
If two tangents drawn from a point P to the parabola y2 = 4x are at right angles, then the locus of P is
A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute.If a1 =a2 =...=a10 =150 and a10, a11,....arein an A.P. with common difference –2, then the time taken by him to count all notes is
A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute.If a1 =a2 =...=a10 =150 and a10, a11,....arein an A.P. with common difference –2, then the time taken by him to count all notes is
The line L given by passes through the point (13, 32). The line K is parallel to L and has the equation .Then the distance between L and K is?
The line L given by 
passes through the point (13, 32). The line K is parallel to L and has the equation
.Then the distance between L and K is?
The area bounded by the curves y = cosx and y = sinx between the ordinates x = 0 and x = 3π/2 is
The area bounded by the curves y = cosx and y = sinx between the ordinates x = 0 and x = 3π/2 is
Solution of the differential equation cosxdy = y(sinx – y)dx, 0 < x < p/2 is
Solution of the differential equation cosxdy = y(sinx – y)dx, 0 < x < p/2 is
Consider the system of linear equations x1 + 2x2 + x3 = 3 2x1 + 3x2 + x3 = 3 3x1 + 5x2 + 2x3 = 1 The system has
Consider the system of linear equations
x1 + 2x2 + x3 = 3
2x1 + 3x2 + x3 = 3
3x1 + 5x2 + 2x3 = 1
The system has
If and are the roots of the equation
If 
and 
are the roots of the equation 
If , then for all real x
If 
, then for all real x