NEET 2018 Question Paper Mock Test

The volume ($V$) of a monatomic gas varies with its temperature ($T$), as shown in the graph (a straight line passing through the origin). The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is:

The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is $20\text{cm}$, the length of the open organ pipe is:

At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere?(Given: Mass of oxygen molecule ($m$) = $2.76\times 10^{-26}\text{kg}$, Boltzmann's constant $k_B=1.38\times 10^{-23}{\text{JK}}^{-1}$, Escape velocity $v_e=11200\text{m/s}$)

The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is:

A carbon resistor of $(47\pm 4.7)\text{k}\Omega$ is to be marked with rings of different colours for its identification. The colour code sequence will be: