### ALL Questions

## The term that corrects for the attractive forces present in a real gas in the van der Waals equation is

The term that corrects for the attractive forces present in a real gas in the van der Waals equation is

## Two samples of gases A and B are at the same temperature. The molecules of A are travelling four times faster than the molecules of B. The ratio of mA / mB

Two samples of gases A and B are at the same temperature. The molecules of A are travelling four times faster

than the molecules of B. The ratio of mA / mB

## Five molecules of a gas moving with speeds 1, 2, 3, 4, 5 km/s. What is their root mean square speed?

Five molecules of a gas moving with speeds 1, 2, 3, 4, 5 km/s. What is their root mean square speed?

## The mass percent composition of dry air at sea level is given. The partial pressure of each component will be

The mass percent composition of dry air at sea level is given. The partial pressure of each component will be

## A vertical hollow cylinder of height 152 cm is fitted with a weightless piston. The lower half is filled with an ideal gas and the upper half with mercury.The cylinder is now heated at300K,so that 1/4th of the mercury comes out.Find the temperature at which it will happen assuming thermal expansion of Hg to be negligible

A vertical hollow cylinder of height 152 cm is fitted with a weightless piston. The lower half is filled with an ideal gas and the upper half with mercury.The cylinder is now heated at300K,so that 1/4th of the mercury comes out.Find the temperature at which it will happen assuming thermal expansion of Hg to be negligible

## A 10 cm air column is trapped inside the tube (having uniform area of cross section) by 6 cm of Hg and is placed horizontally to the plane. Calculate the length of air column when the tube is placed vertically with opened end up.

A 10 cm air column is trapped inside the tube (having uniform area of cross section) by 6 cm of Hg and is placed horizontally to the plane. Calculate the length of air column when the tube is placed vertically with opened end up.

## 50 ml of mixture of NH3 and H2 are decomposed to yield N2 and H2 and to the resulting mixture 40 ml O2 is added and the mixture is sparked to yield H2O. When the resulting mixture of gases were passed through alkaline pyrogallol 6 ml contraction was observed. Calculate the percentage composition of NH3 in the original mixture

50 ml of mixture of NH3 and H2 are decomposed to yield N2 and H2 and to the resulting mixture 40 ml O2 is added and the mixture is sparked to yield H2O. When the resulting mixture of gases were passed through alkaline pyrogallol 6 ml contraction was observed. Calculate the percentage composition of NH3 in the original mixture

## 2 g of a gas A is introduced into an evacuated flask kept at 25°C. The pressure is found to be 1 atm. If 3 g of another gas B is added to the same flask the total pressure becomes 1.5 atm, assuming ideal gas behaviour. The ratio of molecular weight of gas A to gas B (MA : MB) is

2 g of a gas A is introduced into an evacuated flask kept at 25°C. The pressure is found to be 1 atm. If 3 g of another gas B is added to the same flask the total pressure becomes 1.5 atm, assuming ideal gas behaviour. The ratio of molecular weight of gas A to gas B (MA : MB) is

## At what temperature, the average speed of gas molecules will be double that at 27°C ?

At what temperature, the average speed of gas molecules will be double that at 27°C ?

## Two identical bulbs containing ideal gases A and B are taken. Density of A is twice that of B .Mol wt. of A is half that of B.If two gases are at the same temperature, the ratio of pressure of A & B is

Two identical bulbs containing ideal gases A and B are taken. Density of A is twice that of B .Mol wt. of A is half that of B.If two gases are at the same temperature, the ratio of pressure of A & B is

## 200 ml of He at 0.66 atm pressure and 400 ml of O2 at 0.52 atm pressure are mixed in a 400 ml vessel at 25°C. The partial pressure of He and O2 will be?

200 ml of He at 0.66 atm pressure and 400 ml of O2 at 0.52 atm pressure are mixed in a 400 ml vessel at 25°C. The partial pressure of He and O2 will be?

## If there are n capacitors in parallel connected to V volt source, then the energy stored is equal to

If there are n capacitors in parallel connected to *V *volt source, then the energy stored is equal to

## A charged particle q is placed at the centre O of cube of length L (ABCDEFGH). Another same charge q is placed at a distance L from O. Then the electric flux through ABCD is

A charged particle *q* is placed at the centre *O* of cube of length *L (ABCDEFGH)*. Another same charge *q* is placed at a distance *L *from *O*. Then the electric flux through *ABCD* is

## On moving a charge of 20 coulomb by 2 cm, 2 J of work is done, then what will be the potential difference between the points?

On moving a charge of 20 coulomb by 2 cm, 2 J of work is done, then what will be the potential difference between the points?

## A and B are two concentric hollow conductors having radii a and 2a and charged 2Q and Q respectively.If potential of outer sphere is 5V then potential of inner sphere is?

A and B are two concentric hollow conductors having radii a and 2a and charged 2Q and Q respectively.If potential of outer sphere is 5V then potential of inner sphere is?

## 0.2 g of a gas X occupies a volume of 0.44 litre at given pressure and temperature. Under identical conditions of P and T, 0.1 g of CO2 gas occupies 0.32 L volume. The gas X can be

0.2 g of a gas X occupies a volume of 0.44 litre at given pressure and temperature. Under identical conditions of P and T, 0.1 g of CO2 gas occupies 0.32 L volume. The gas X can be

## One end of a thermally insulated rod is kept at a temperature T1 and the other at T2. The rod is composed of two sections of lengths l1 and l2 and thermal conductivities K1 and K2 respectively. What would be the temperature at the interface of the two sections? -0

One end of a thermally insulated rod is kept at a temperature *T _{1}* and the other at

*T*The rod is composed of two sections of lengths

_{2}.*l*and

_{1}*l*and thermal conductivities

_{2}*K*and

_{1}*K*respectively. What would be the temperature at the interface of the two sections?

_{2}-0

## Assuming the sun to be a spherical body of radius R at a temperature of TK, evaluate the total radiant power, incident on earth, at a distance r from the sun. Note: r0 is the radius of the earth and is Stefan's constant.

Assuming the sun to be a spherical body of radius *R* at a temperature of *TK*, evaluate the total radiant power, incident on earth, at a distance *r* from the sun.

Note: r_{0} is the radius of the earth and is Stefan's constant.

## The figure shows a system of two concentric spheres of radii r1 and r2 and kept at temperatures T1 and T2, respectively. The radial rate of flow of heat in a substance between the two concentric spheres is proportional to

The figure shows a system of two concentric spheres of radii *r*_{1 }and *r _{2}* and kept at temperatures

*T*

_{1 }and

*T*respectively. The radial rate of flow of heat in a substance between the two concentric spheres is proportional to

_{2},## The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x, respectively are T2 and T1 (T2 > T1). The rate of heat transfer through the slab, in a steady state is , with equal to

The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity *K* and *2K* and thickness *x* and *4x*, respectively are *T _{2 }* and

*T*

_{1 }(

*T*). The rate of heat transfer through the slab, in a steady state is , with equal to

_{2 }> T_{1}## Radiation of energy E falls normally on a perfectly reflecting surface. What is the momentum transferred to the surface?

Radiation of energy *E* falls normally on a perfectly reflecting surface. What is the momentum transferred to the surface?

## If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously will be

If the temperature of the sun were to increase from *T* to *2T* and its radius from *R* to *2R*, then the ratio of the radiant energy received on earth to what it was previously will be

## According to Newton's law of cooling, the rate of cooling of a body is proportional to where is the difference of the temperature of the body and the surroundings, and n is equal to

According to Newton's law of cooling, the rate of cooling of a body is proportional to where is the difference of the temperature of the body and the surroundings, and *n* is equal to

## The earth radiates in the infrared region of the spectrum. The wavelength of the maximum intensity of the spectrum is correctly given by

The earth radiates in the infrared region of the spectrum. The wavelength of the maximum intensity of the spectrum is correctly given by

## Two spheres of the same material have radii 1 m and 4 m and temperatures 4000 K and 2000 K respectively. What is the ratio of the energy radiated per second by the first sphere to that by the second?

Two spheres of the same material have radii 1 m and 4 m and temperatures 4000 K and 2000 K respectively. What is the ratio of the energy radiated per second by the first sphere to that by the second?

## Which of the following is more close to a black body?

Which of the following is more close to a black body?

## One end of a thermally insulated rod is kept at a temperature T1 and the other at T2. The rod is composed of two sections of lengths l1 and l2 and thermal conductivities K1 and K2 respectively. What would be the temperature at the interface of the two sections? -0

One end of a thermally insulated rod is kept at a temperature *T _{1}* and the other at

*T*The rod is composed of two sections of lengths

_{2}.*l*and

_{1}*l*and thermal conductivities

_{2}*K*and

_{1}*K*respectively. What would be the temperature at the interface of the two sections?

_{2}-0

## The mature embryo sac of an angiosperm is 7-celled and 8-necleate structure.Explain this with appropriate diagram

The mature embryo sac of an angiosperm is 7-celled and 8-necleate structure.Explain this with appropriate diagram

## How the production of progesterone gets increased in secretory phase?

How the production of progesterone gets increased in secretory phase?

## At which phase of menstrual cycle does LH attain a peak level?state the main feature of the phase.

At which phase of menstrual cycle does LH attain a peak level?state the main feature of the phase.

## How porogamy differs from chalazogamy and mesogamy?

How porogamy differs from chalazogamy and mesogamy?

## Draw a well leblled Plants L.S. of pistil showing pollen tube entering the embryo sac.

Draw a well leblled Plants L.S. of pistil showing pollen tube entering the embryo sac.

## How monocarpic Plants differ from polycarpic plants?

How monocarpic Plants differ from polycarpic plants?

## WHat are the different types of syngamy on the basic of stricture of fusing gameters?

WHat are the different types of syngamy on the basic of stricture of fusing gameters?

## Coconut has both multicellular and free nuclear endosperm. Explain the types.

Coconut has both multicellular and free nuclear endosperm. Explain the types.

## What is CuT? How is it effective among barrier methods?

What is CuT? How is it effective among barrier methods?

## how zoospores differ from conindia in lower group of organisms?

how zoospores differ from conindia in lower group of organisms?

## Pollen grains are well preserved as microfossils due to the presence of sporopollenin. Explain the Statement.

Pollen grains are well preserved as microfossils due to the presence of sporopollenin. Explain the Statement.

## How does cortical reaction prevents the entry of additional sperms into ovum?

How does cortical reaction prevents the entry of additional sperms into ovum?

## Sertoli cells secrete androgen binding protein and inhibin explain their functions.

Sertoli cells secrete androgen binding protein and inhibin explain their functions.

## Organisms produced through asexual reproduction have low adaptability to the changing environment.Justify the statement.

Organisms produced through asexual reproduction have low adaptability to the changing environment.Justify the statement.

## What is the function of suspensor cell in a dividing dicot embryo?

What is the function of suspensor cell in a dividing dicot embryo?

## How ZIFT is different from IUT?

How ZIFT is different from IUT?

## What is the name of the space that appears between epiblast and trophoblast in a developing human embryo?

What is the name of the space that appears between epiblast and trophoblast in a developing human embryo?

## How does dicliny differs from prepotency as two outbreeding contrivances?

How does dicliny differs from prepotency as two outbreeding contrivances?

## The Chance of survival among young ones of viviparous animals are more than those of oviparous animals, why?

The Chance of survival among young ones of viviparous animals are more than those of oviparous animals, why?

## Name an Organism showing oblique binary fission.

Name an Organism showing oblique binary fission.

## Knowing rate of disappearance

For an elementary reaction

## If CP and Cv denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then

If C_{P} and C_{v }denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then

## A Carnot engine, having an efficiency of n = 1/10 as a heat engine, is used as a refrigerator. If the work done on the system is 10 J, what will be the amount of energy absorbed from the reservoir at a lower temperature?

A Carnot engine, having an efficiency of *n* = 1/10 as a heat engine, is used as a refrigerator. If the work done on the system is 10 J, what will be the amount of energy absorbed from the reservoir at a lower temperature?