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The efficiency of an ideal heat engine (Carnot heat engine) working between the freezing point and boiling point of water is:
Select the option including all sexually transmitted diseases.
A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then:
If $Q$, $E$ and $W$ denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then
The product 'X' in the below mentioned reaction is:
Which of the following regions of the globe exhibits highest species diversity?
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:
A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system in the cycle is:
The molar specific heats of an ideal gas at constant pressure and volume are denoted by $C_P$ and $C_V$, respectively. If $\gamma = \frac{C_P}{C_V}$ and $R$ is the universal gas constant, then $C_V$ is equal to:
The dimensional formula for impulse is:
One mole of an ideal gas goes from an initial state $A$ to the final state $B$ with two processes. It first undergoes isothermal expansion from volume $V$ to $3V$ and then its volume is reduced from $3V$ to $V$ at constant pressure. The correct $(P-V)$ diagram representing the two processes is:
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
During an isothermal expansion, a confined ideal gas does $-150\text{ J}$ of work against its surrounding. This implies that:
The internal energy change in a system that has absorbed $2 \text{ kcal}$ of heat and done $500 \text{ J}$ of work is:
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is
In a double-slit experiment, the two slits are $1\text{ mm}$ apart and the screen is placed $1\text{ m}$ away. A monochromatic light of wavelength $500\text{ nm}$ is used. What will be the width of each slit for obtaining ten maxima of double-slit within the central maxima of a single-slit pattern?
An ideal gas undergoes a thermodynamic process described by the equation: $PV^2 = C$, where $C$ is a constant. The gas transitions from an initial state $(P_1, V_1, T_1)$ to a final state $(P_2, V_2, T_2)$. Which of the following statements is correct?
A gas undergoes an isothermal process. The specific heat capacity of the gas in the process is:
$4.0 \text{ g}$ of a gas occupies $22.4 \text{ L}$ at NTP. The specific heat capacity of the gas at constant volume is $5.0 \text{ J K}^{-1}\text{mol}^{-1}$. If the speed of sound in this gas at NTP is $952 \text{ ms}^{-1}$, then the heat capacity at constant pressure is: (Take gas constant $R = 8.3 \text{ J K}^{-1}\text{mol}^{-1}$)
A speed motorcyclist sees a traffic jam ahead of him. He slows down to $36 \text{ km/h}$. He finds that traffic has eased and a car moving in front of him at $18 \text{ km/h}$ is honking at a frequency of $1392 \text{ Hz}$. If the speed of sound is $343 \text{ m/s}$, the frequency of the honk as heard by him will be