List of practice Questions

Value of $\sin 12^{\circ}.\sin \, 48^{\circ}.\sin \, 54^{\circ} $ is:
Value of universal gas constant R depends upon
Van Arkel method of purification of metals involves converting the metal to
Urinary bladder is absent in
Use of lubricants can not reduce
Using elementary transformations, find the inverse of matrix $\begin{bmatrix}-1&1&2\\ 1&2&3\\ 3&1&1\end{bmatrix}.$
Using the principle of homogeneity of dimensions, which of the following is correct ?
Uptake of mineral ions against concentration gradient is called
Urea from the blood can be removed by
Urethral meatus refers to the
Uric acid gets deposited in small joints to produce
Unpolarised light of intensity $32\, Wm^{-2}$ passes through three polarisers such that the transmission axis of the last polariser is crossed with first. If the ensity of the emerging light is $3\, Wm^{-2}$ the angle between the axes of the first two polarisers is.
Unpolarized light of intensity $I_0$ is incident on a polarizer and the emerging light strikes a second polarizing filter with its axis at 45$^\circ$ to that of the first. The intensity of the emerging beam
Uphill transport i.e., movement of substances from their lower concentration to their higher concentration occurs in
Unit of ionic mobility is
Units commonly used for measuring wavelength of light and distance between neutron and proton of an atom are
Unit of electrical conductivity is
Unit of intensity of illumination is:
Under water pollination occurs in
Unicellular microscopic organisms were first studied by
Uniform magnetic field exists in region given by B=3i+4j+5k . A rod of length 5 m is placed along y - axis is moved along x axis with constant speed 1 m/sec. Then the magnitude of induced e.m.f in the rod is :
Types of heterotrophic nutrition are
$\hat{u} $ and $\hat{v}$ are unit vectors such that $\hat{u}.\hat{v}=0\overrightarrow{r}$ is any vector coplanar with $\hat{u}$ and $\hat{v}$ the magnitude of the vector $\overrightarrow{r}\times(\hat{u}\times\hat{v}$ is
Unbranched, erect, cylindrical stout axis with distinct nodes and internodes and with jointed appearance is called as
Tyndall effect would be observed in a