List of practice Questions

The velocity of sound waves in a medium does not depend on

The total energy of an electron in an atom in an orbit is $-3.4\,eV$ . Its kinetic and potential energies arc, respectively:

The $Q$ factor for a damped oscillator is given by the

The frequency of an alternating current is 50 Hz. What is the minimum time taken by current to reach its peak value from rms value?

Skeletal muscles are controlled by -

Select the correct statement regarding shapes of $PCl_5, BrF_5$ and $IF_7$.

One mole of $O_2$ gas is heated at constant pressure starting at $27^o$C. How much energy must be added to the gas as heat to double its volume?

Number of ways of forming a committee of $6$ members out of $5$ Indians, $5$ Americans and $5$ Australians such that there will be atleast one member from each country in the committee is

Myosin head separates from actin when :

Most common isotope of hydrogen (Non radioactive):

Magnesium is burnt in air to form $A$ and $B$. When $B$ is hydrolysed, $C$ and $D$ are formed. $D$ is the reactant in the manufacture of nitric acid by Ostwald's process. What is $C$

Let $f(x) = x^2 + 2x + 2, g(x) = - x^2 + 2x - 1 $ and $a, b$ be the extreme values of $f(x), g(x)$ respectively. If $c$ is the extreme value of $\frac{f}{g} (x)$ (for x $\neq$ 1), then $a + 2b + 5c + 4$ =

Length of the spinal cord in humans is:

Kwashiorkor disease is due to :-

In Ti-plasmid, which of the following is removed:

Let $x \, \in \, R$ and let $P = \begin{bmatrix}1&1&1\\ 0&2&2\\ 0&0&3\end{bmatrix},\quad Q = \begin{bmatrix}2&x&x\\ 0&4&0\\ x&x&6\end{bmatrix}$ and $R = PQP^{-1}$. Then which of the following options is/are correct?

Find force per unit length at P.

Energy of electron (in eV) in 2nd orbit of He ion ?

Correct order of basic strength is :

Choose the correct option

Chimeric DNA is

Calculate the mean % error in five observations : 80.0, 80.5, 81.0, 81.5, 82

Calculate emf of cell at 25?C Cell notation $M\left|M^{2+}_{0.01}\right|\left|M^{2+}_{0.00001}\right|M$ If value of E is 4 volt (Given $\frac{RT}{F}$ in 10 = 0.06)

Virus free plants can be generated through

A variable line passes through the fixed point ($\alpha,\,\beta$). The locus of the foot of the perpendicular from the origin on the line is,