Use the formula `upsilon = sqrt((gamma P )/( rho ))` to explain why the speed of sound in air
(a) is independent of pressure.
(b) increases with temperature.
(c ) increases with humidity.

Velocity of sound in air (I) increases with temperature (II) decreases with temperature (III) increase with pressure (IV) is independent of pressure (V) decreases with pressure (VI) is independent of temperature Choose the correct answer

The following are some state ments regarding dissociation of lime stone according to the equation CaCO_(3(s)) hArr CaO_((s)) + CO_(2(g)) : Delta H = 110 kJ. The reaction is carried in a closed vessel. A) The pressure of CO_(2) increases when temperature is inereased. B) The pressure of CO_(2) inereases when temperature is deereased C) The pressure of CO_(2) increases when amount of CaCO_(3) is decreased. The incorrect statements are .

At 473K, equilibrium constant K_(C) for the decompositioni of phosphorus pentachloride, PCl_(5) is 8.3xx10^(-3) . If the decomposition is depicted as: PCl_(5)(g)hArrPCl_(3)(g)+Cl_(2)(g)DeltaH=124.0 kJ "mol"^(-1) a. Write an expression of K_(c) for the reaction. b. What is the value of K_(c) for the reverse reaction at the same temperature? c. What would be effect on K_(c) if (i) more PCl_(5) is added (ii) pressure is increased (iii) the temperature in increased.

Choose the correct alternative: (a) Alloys of metals usually have (greater/less) resistivity than that of their constituent metals. (b) Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals. (c ) The resisitivity of the alloy manganin is nearly independent of/increases rapidly with increase of temperature. (d) The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (10 ^(22) //10 ^(23)).

A spherical shell of copper is completely filled with a liquid at a temperature t^(@)C . The bulk moduls of the liquid is K and coefficient of volume expansion is gamma . If the temperature of the liquid and the shell is increased by DeltaT , then the outward pressure Deltap on the shell that results from the temperature increase is given by ( alpha is the coefficient of linear expansion of the material to the shell):

The speed of sound in air at temperature T and pressure p is v. When the temperature is increased to 2T and the pressure is reduced to p /2, then the speed is changed to

The population of activated molecules can be increased by A) increase in temperature B) using a catalyst C) increase of concentration of reactants