Ideal Gas Equation

Q.

Why do real gases deviate from ideal gas behavior?

Q.

One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 litre, 95 k) $\to$ (4.0 atm, 5.0 litre, 245 k) with a change in internal energy, $\Delta U$ = 30.0 L atm. The change in enthalpy ($\Delta H$) of the process in L-atm is

1. Not defined because the pressure is not constant

2. 44.0

3. 40

4. 42.3

Q. The mass of one molecule of water is approximately(1) 3 x 10^{-23} g(3) 1.5 x 10^{-23} g(2) 18 g(4) 4.5 x 10-23^{

Q. 62.An adiabatic chamber has frictionless insulated piston of mass m .Mass of the remaining chamber including gas is 4m . "n" moles of an ideal monoatomic gas is present inside chamber at atmospheric temperature and pressure. Piston is in rest at equilibrium and confined to move along ldngth of the cylinder .A particle of mass m moving horizontally with speed v strikes elastically with the piston .Find the change in temperature of the gas when the compression if the gas is maximum.

Q. A vessel has 6g of oxygen at a pressure P and temperature 400 k. A small hole is made in it so that O2 leaks out. How much O2 leaks out if the pressure is P/2 and temperature 300 k. 1. 5g 2. 4g 3. 2g 4. 3g

Q.

If the beams of electrons and protons move parallel to each other in the same direction, then they

1. attract each other

2. Repel each other

3. No relation

4. Neither attract nor repel

Q. 2 0.126 g of an acid requires 20 ml of 0.1 N NaOH for complete neutralization. Eq, wt. of the acid is(1) 45(2) 53(3) 404) 63

Q. When the temperature is raised, the viscosity of the liquid decreases. This is because :

1. Attraction between the molecules increases
2. Covalent and hydrogen bond forces decreases
3. Volume of the solution decreases
4. Increase in temperature increases the average kinetic energy of the molecules, which overcomes the attractive forces between them

Q.

A gas contained in a cylinder fitted with a frictionless piston expands against a constant pressure 1 atmosphere from a volume of 4 liter to a volume of 14 liter. In doing so, it absorbs 800J thermal energy from surroundings. The value of $\Delta U$ for the process is.

1. -113.7 J

2. 113.7 J

3. -213.7 J

4. 213.7 J

Q.

Give some examples of the electric dipole with an explanation.

Q. 30. 21 J of heat energy is supplied to a diatomic idealgas at constant pressure, then change in internalenergy of the gas is(1) 10 J(2) 12 J(3) 15 J(4) 18 J

Q. The mass of 94.5ml of a gas at S.T.P. is found to be 0.2231 g. Calculate its molecular mass.

Q. 10. Four 1-1 litre flasks are separately filled with the gases H2, He, O2 & O3 at the same temperature and pressure. The ratio of total number of atoms of these gases present in different flask would be what?

Q. For a gas in an adiabatic process, the internal energy is given by, U=a+bPV. Here a and b are constant. P and V are pressure and volume respectively. For the gas, the ratio of C(p) and C(v) is Z. Prove that, Z=\lbrack(b+1)/b\rbrack

Q.

A gaseous mixture contains oxygen and other unknown gas in molar ratio 4:1 diffuses through a porous plugin 245 sec. under similar condition , same volume of oxygen takes 220 sec to diffuse . Find the molecular mass of unknown gas.

Q. D) 6.023 x 1024Q.2Find the volume of CO2 obtained at S.T.P. onheating 200 gm of 50% pure CaCO3"(A) 11.2 litre(C) 44.8 litre(B) 22.4 litre(D) None of these

Q. 62.Given that 1 mole of N2 at NTP occupies 22.4litres.The density of N2 is:- (a)1.25g/L (b)0.80g/L (c)2.5g/L (d)1.60g/L

Q. The circulation of blood in human body supplies $O_2$ and releases $C{O}_2$. The concentration of $O_2$ and $C{O}_2$ is variable but on an average, $100\text{mL}$ blood contains $0.02\text{g}$ of $O_2$ and $0.08\text{g}$ of $C{O}_2$. The volume of $O_2$ and $C{O}_2$ at $1\text{atm}$ and at body temperature ${37}^{\circ }\text{C}$, assuming $10\text{L}$ blood in human body, is

1. $2\text{L},4\text{L}$
2. $1.5\text{L},4.5\text{L}$
3. $1.59\text{L},4.62\text{L}$
4. $3.82\text{L},4.62\text{L}$

Q. $N_2+3H_2\to 2N{H}_3$
1 mol of $N_2$ and 4 mol of $H_2$ are taken in a $15\text{L}$ flask at ${27}^{\circ }\text{C}$. After the complete conversion of $N_2$ into $N{H}_3$, $5\text{L}$ of $H_{2}O$ is added. The pressure set up in the flask is:

1. $\frac{3\times 0.0821\times 300}{15}\text{atm}$
2. $\frac{2\times 0.0821\times 300}{10}\text{atm}$
3. $\frac{1\times 0.0821\times 300}{15}\text{atm}$
4. $\frac{1\times 0.0821\times 300}{10}\text{atm}$

Q. Total pressure of a mixture of $H_2$ and $O_2$ is 1.0 bar. The mixture is allowed to react to form water, which is completely removed to leave only pure $H_2$ at a pressure of 0.34 bar. Assuming ideal gas behaviour and that all pressure measurements were made under the same temperature and volume conditions, the composition of the original mixture is:

1. $\begin{array}{cc}{X}_{H_2}& X_{O_2}\\ 0.50& 0.50\end{array}$
2. $\begin{array}{cc}{X}_{H_2}& X_{O_2}\\ 0.22& 0.78\end{array}$
3. $\begin{array}{cc}{X}_{H_2}& X_{O_2}\\ 0.78& 0.22\end{array}$
4. $\begin{array}{cc}{X}_{H_2}& X_{O_2}\\ 0.35& 0.65\end{array}$

Q. When 1 mole of H2(g)is heated with one moleis(g)of I2, (g), it was found that 1.48 moles of HI(g) formed at equilibrium. Its Kc is

Q. 82 An element A crystallizes as bcc lattice with edge length 288 pm . Calculate its density.(A=51.7).

Q.

Which of the following expressions correctly represents the relationship between the average molar kinetic energy $\overline{K.E}$, of CO and $N_2$ molecules at the same temperature

1. 

2. 

3. Cannot be predicted unless the volumes of the gases are given

4. 

Q. 10g of impure sample of CaCO3 requires 4.38g HCl for complete neutralisation . The percentage purity of the sample is ?

Q. 0.1 g of a solution containing Na2CO3 and NaHCO3 requires 10 ml, of 0.01 N HCl.neutralization using phenophthalein .wt % of Na2C03 in solutions is:(a) 25 (b) 32 (c) 50 (d) None of thes

Q. Gas analysis of sample shows that it has 20% H_2, 40% CH_4, 10% CO, 20% C_2H_6 and 10% non combustible inert gases (Volume%). 2m^3 volume of above sample is combusted (burnt) completely with oxygen. If\:X is the volume of air required (in m^3). Calculate the value of 10X/33. (Air consists 20% oxygen by volume)

Q. 69.How to derive Gay Lussacs Law relation from Boyles law and Charles law?

Q.

'x' moles of $N_2$ gas at S.T.P conditions occupy a volume of 10 litres, then the volume of '2x' moles of $C{H}_4$ at ${273}^{0}C$ and 1.5 atm is

1. 20 lit

2. 26.6 lit

3. 5 lit

4. 16.6 lit

Q. Henry's law constant for ${CO}_2$ in water is $1.67\times {10}^8$Pa at 298K. Calculate the quantity of ${CO}_2$ in 500 ml of soda water when packed under 2.5 atm ${CO}_2$ pressure at 298 K.

Q. 10.20 ml H202 sol. React completely with 20ml of KMnO4 sol. Under acidic medium . The same vol.of KMnO4 required 10ml of MnSO4 in a neutral medium to give brown PPT. Of MnO2. This PPT. was reacted completely with 10ml. Of 0.2M Na2C2O4 under acidic medium. Find the molarity of H2O2?