MCQ_SINGLE

The lens combination as shown in the figure, consists of two lenses, $L_{1}$ and $L_{2}$, of the focal lengths +10 cm and -10 cm, respectively. The position of the image formed is: [Image Placeholder]

MCQ_SINGLE

For a salt XY, which is a strong electrolyte, the plot of $\Lambda_{m}$ versus $\sqrt{c}$ has a slope of $-90.0~S~cm^{2}mol^{-3/2}L^{1/2}$ at 298 K. At 0.01 M concentration of XY, the value of $\Lambda_{m}$ is $145.0~S~cm^{2}mol^{-1}$. The limiting molar conductivity of $Y^{-}$ ion $(\lambda_{Y^{-}}^{0}$, in $S~cm^{2}~mol^{-1}$) at 298 K will be (Given : $\lambda_{X^{+}}^{0}=74.0~S~cm^{2}mol^{-1})$

MCQ_SINGLE

For an elementary chemical reaction, the Arrhenius plot is given below. [Image Placeholder] If the energy of activation is $6.64~kJ~mol^{-1}$ and $R=8.3~J~K^{-1}mol^{-1}$, the temperature at which the rate constant becomes $e^{2}min^{-1}$, is

MCQ_SINGLE

The green paramagnetic species formed by heating $KMnO_{4}$ at 513 K is

MCQ_SINGLE

A particle of mass M moves along a horizontal x axis from $x=0$ to $x=L$. The coefficient of kinetic friction varies as a function of x as $\mu_{k}(x)=\mu_{0}-\alpha x,$ where $\mu_0$, $\alpha$ are constants of appropriate dimensions, so that $\mu_{k}(L)=0$. The total work done by the frictional force during the motion is $n\mu_0 MgL$, where g is the acceleration due to gravity. The value of n is:

View All Questions