NEET 2023 Question Paper Mock Test

The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are $2.14\text{eV}$, $2.30\text{eV}$ and $2.75\text{eV}$ respectively. If incident electromagnetic radiation has an incident energy of $2.20\text{eV}$, which of these photosensitive surfaces may emit photoelectrons?

The temperature of gas is $-50^{\circ }\text{C}$. To what temperature the gas should be heated so that the RMS speed is increased by $3$ times?

The ratio of frequencies of fundamental harmonic produced by an open pipe to that of a closed pipe having the same length is:

Resistance of a carbon resistor determined from colour codes is $(22000\pm 5\%)\Omega$. The colour of the third band must be:

For Young's double slit experiment, two statements are given below:Statement I: If the screen is moved away from the plane of slits, the angular separation of the fringes remains constant.Statement II: If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.In the light of the above statements, choose the correct answer: