Physics-
General
Easy
Question
5.6 litre of helium gas at SIP is adiabatically compressed to 0.7 litre. Taking the in initial temperature to be T1,the work done in the process is
The correct answer is:
Related Questions to study
Physics-
In a Carnot engine, the temperature of reservoir is 927
Cand that of sink is 27C. If the work done by the engine when it transfers heat from reservoir to sink is 12.6 
106J,the quantity of heat absorbed by the engine from the reservoir is
In a Carnot engine, the temperature of reservoir is 927Cand that of sink is 27C. If the work done by the engine when it transfers heat from reservoir to sink is 12.6 106J,the quantity of heat absorbed by the engine from the reservoir is
Physics-General
Physics-
A diatomic ideal gas is compressed adiabatically to 1/32 of its initial volume. If the initial temperature of the gas isT1(in Kelvin) and the final temperature is aT1,the value of a is
A diatomic ideal gas is compressed adiabatically to 1/32 of its initial volume. If the initial temperature of the gas isT1(in Kelvin) and the final temperature is aT1,the value of a is
Physics-General
Physics-
The specific heat capacity of a metal at low temperature(7) is given as
A 100g vessel of this metal is to be cooled from 20 K to 4 K by a special refrigerator operating at room temperature(27C). The amount of work required to cool in vessel is
The specific heat capacity of a metal at low temperature(7) is given asA 100g vessel of this metal is to be cooled from 20 K to 4 K by a special refrigerator operating at room temperature(27C). The amount of work required to cool in vessel is
Physics-General
Physics-
Consider a spherical shell of radius R at temperature T. The black body radiation in side it can be considered as an ideal gas of photons with internal energy per unit volume u=
and pressure 
If the shell now undergoes an adiabatic expansion the relation between T and R is:
Consider a spherical shell of radius R at temperature T. The black body radiation in side it can be considered as an ideal gas of photons with internal energy per unit volume u=and pressure If the shell now undergoes an adiabatic expansion the relation between T and R is:
Physics-General
General
Which of the following is the unit for centrifugal force?
Which of the following is the unit for centrifugal force?
GeneralGeneral
Maths-
If the sides of a triangle ABC are a, b and c such that 2b = a + c,
then exhaustive range of 
is
If the sides of a triangle ABC are a, b and c such that 2b = a + c,then exhaustive range of is
Maths-General
Physics-
Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate.
Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate.
Physics-General
Chemistry-
The centre of the Sun consists of gases whose average molecular weight is 2. If the density of the gases is 
at a pressure of 
atm, the temperature at the centre of the sun is (assuming ideal behavior)
The centre of the Sun consists of gases whose average molecular weight is 2. If the density of the gases is at a pressure of atm, the temperature at the centre of the sun is (assuming ideal behavior)
Chemistry-General
Chemistry-
What is the numerical value of gas constant R, in lit 
?
What is the numerical value of gas constant R, in lit ?
Chemistry-General
Chemistry-
At 0°C and a pressure of 2 atmospheres volume of 1 gram of a diatomic gaseous element is 350ml. Weight of 1 atom of the element in grams is
At 0°C and a pressure of 2 atmospheres volume of 1 gram of a diatomic gaseous element is 350ml. Weight of 1 atom of the element in grams is
Chemistry-General
Chemistry-
Oxygen is present in a flask of 1.12L capacity at a pressure of 
mm of Hg at O°C. The number of oxygen molecules in the flask is
Oxygen is present in a flask of 1.12L capacity at a pressure of mm of Hg at O°C. The number of oxygen molecules in the flask is
Chemistry-General
Chemistry-
The average speed at 
K and most probable speed at 
K of 
gas is 
4 cm/sec. The values of and are
The average speed at K and most probable speed at K of gas is 4 cm/sec. The values of and are
Chemistry-General
Chemistry-
The RMS velocity of a gas is 
cm/sec The most probable velocity of the molecules is
The RMS velocity of a gas is cm/sec The most probable velocity of the molecules is
Chemistry-General
Chemistry-
A student forgot to add the reaction mixture to the round bottomed flask at 27°C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake and using a pyrometer he found the temperature of flask was 477°C. The fraction of air that has been expelled out is
A student forgot to add the reaction mixture to the round bottomed flask at 27°C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake and using a pyrometer he found the temperature of flask was 477°C. The fraction of air that has been expelled out is
Chemistry-General
Chemistry-
Time taken to distribute one Avogadro number of wheat grains, if 1010 grains are distributed in each second is
Time taken to distribute one Avogadro number of wheat grains, if 1010 grains are distributed in each second is
Chemistry-General
