The $emf$ (in $V$) of a Daniell cell containing $0.1 \ M$ $ZnSO_4$ and $0.01 \ M$ $CuSO_4$ solutions at their respective electrodes is
$(E_{Cu^{2+} / Cu}^{\circ} = +0.34 \ V; E_{Zn^{2+} / Zn}^{\circ} = -0.76 \ V)$

The work functions for metals $A, B$ and $C$ are respectively $1.92\, eV$,$2.0\, eV$ and $5\, eV$. According to Einstein's photoelectric equation,the metals which will emit photoelectrons for a radiation of wavelength $4100\, \mathring{A}$ is/are:

The volume-temperature graphs of a given mass of an ideal gas at constant pressures are shown below. What is the correct order of pressures?

Three identical bodies of equal mass $M$ each are moving along a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each body is

Read the following statements carefully and select the correct statements.
$(1)$ The wheat variety $Atlas-66$ has high protein content.
$(2)$ $SCP$ is an alternative source of protein for human and animal nutrition.
$(3)$ Plants developed through micropropagation are genetically different from the parent plant.
$(4)$ Semi-dwarf rice varieties were developed from $IR-8$ and $Taichung Native-1$.

The minimum value of the function $f(x) = x \log x$ is