Practice Test 2 - Physics & Chemistry (CIEL) - NEET MCQ

RMS speed of a monatomic gas is increased by 2 times. If the process is done adiabatically then the ratio of initial volume to final volume will be

Rate of heat flow through two conducting rods of identical dimensions having thermal conductivities K₁ and K₂ are Q₁ and Q₂ when their ends are maintained at the same difference of temperature individually. When the two rods are joined in series with their ends maintained at the same temperature difference (as shown in the figure), the rate of heat flow will be

Which one of the following would raise the temperature of 20 g of water at 30°C most when mixed with?

(Specific heat of water is 1 cal/g–°C)

120 g of ice at 0°C is mixed with 100 g of water at 80°C. Latent heat of fusion is 80 cal/g and specific heat of water is 1 cal/g-°C. The final temperature of the mixture is

In the above problem mass of ice and water in the mixture when thermal equilibrium is attained is

A metal ball immersed in water weighs w₁ and 0°C and w₂ at 50°C. The coefficient of cubical expansion of metal is less than that of water. Then

A steel tape measures the length of a copper rod as 90.0 cm when both are at 10°C, the calibration temperature, for the tape. When would the tape read for the length of the rod when both are at 30°C.Given α_steel = 1.2 × 10^-5 per°C and α_Cu = 1.7 × 10^-5 per°C.

An aluminium measuring rod, which is correct at 5°C measures the length of a line as 80 cm at 45°C. If thermal coefficient of linear expansion of aluminium is 2.50 × 10^-5 per°C. The correct length of the line is

When a copper sphere is heated, percentage change is

A gas is expanded from volume V₀ to 2V₀ under three different processes. Process 1 is isobaric, process 2 is isothermal and process 3 is adiabatic. Let ΔU₁, ΔU₂ and ΔU₃ be the change in internal energy of the gas in these three processes. Then

During adiabatic process pressure (P) versus density (ρ) equation is

A gas at pressure P₀ is contained in a vessel. If the masses of all the molecules are halved and their speeds doubled, the resulting pressure would be

A cylindrical tube of uniform cross-sectional area A is fitted with two air tight frictionless pistons. The pistons are connected to each other by a metallic wire. Initially the pressure of the gas is P₀ and temperature is T₀-Atmospheric pressure is also P₀. Now the temperature of the gas is increased to 2T₀, the tension in the wire will be

Pressure versus temperature graph of an ideal gas at constant volume V is shown by the straight line A. Now mass of the gas is doubled and the volume is halved, then the corresponding pressure versus temperature graph will be shown by the line

The temperature of a gas contained in a closed vessel increases by 1°C when pressure of the gas is increases by 1°C when pressure of the gas is increased by 1%. The initial temperature of the gas is

P-V diagram of an ideal gas is as shown in figure. Work done by the gas in the process ABCD is

For an ideal monoatomic gas, the universal gas constant R is n times the molar heat capacity at constant pressure C_p. Here n is

What is the approximate change in density of water in a lake at a depth of 400 m below the surface? The density of water at the surface is 1030 kg/m² and bulk modulus of water is 2 × 10⁹ N/m²:

A small block of wood of relative density 0.5 is submerged in water. When the block is released, it starts moving upwards, the acceleration of the block is: (g = 10 ms^-2)

A U-tube of uniform cross-section shown in figure is partially filled with liquid I.Another liquid II which does not mix with I is poured into one side. The liquid levels of the two sides is found the same, while the level of liquid I has risen by 2cm. If the specific gravity of liquid I is 1.1, the specific gravity of liquid II must be:

A tank contains water on top of mercury as shown in figure.A cubical block of side 10 cm is in equilibrium inside the tank. The depth of the block inside mercury is : (RD of the material of block = 8.56, RD of mercury = 13.6)

A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance l and h are shown there. After some time the coin falls into the water. Then:

An ice-cube of density 900 kg/m³ is floating in water of density 1000 kg/m³. The percentage of volume of ice-cube outside the water is:

A liquid X of density 3.36 g/cm³ is poured in a U-tube, which contains Hg. Another liquid Y is poured in left arm with height 8 cm, upper levels of X and Y are same. What is density of Y? (Density of Hg = 13.6 g/cm³).

A raft of wood of mass 120 kg floats in water. The weight that can be put on the raft to make it just sink, should be: (d_raft = 600 kg/m³)

Two bodies M and N of equal masses are suspended from two separate massless springs constants k₁ and k₂ respectively. If the two bodies oscillate vertically such that their maximum velocities are equal, the ratio of the amplitude of vibration of M to that on N is:

If both spring constants K₁ and K₂ are increased to 4K₁ and 4K₂ respectively, what will be the new frequency, if f was the original frequency: