List of practice Questions

The frequency of an $FM$ transmitter without signal input is called

With reference to the pituitary, which of the following statements is true?

The thermonuclear reaction of hydrogen inside the stars is taking place by a cycle of operations. The particular element which acts as a catalyst is

Increasing order of carbon-carbon bond length for the following is $\underset{(A)}{C_2H_4}\,\, \underset{(B)}{C_2H_2}\,\, \underset{(C)}{C_6H_6}\,\, \underset{(D)}{C_2H_6}$

The following data is obtained during the first order thermal decomposition of $2A_{(g)} \rightarrow B_{(g)} + C_{(s)}$, at constant volume and temperature The rate constant in $min^{-1}$ is

$\alpha$ - maltose consists of

Consider the following gaseous equilibria with equilibrium constants $K_1$ and $K_2$ respectively. $SO_{2(g)} + \frac{1}{2} O_{2(g)} \leftrightharpoons SO_{3(g)}$ $2SO_{3(g)} \leftrightharpoons 2SO_{2(g)} + O_{2(g)}$ The equilibrium constants are related as

A small uncharged metallic sphere is positioned exactly at a point midway between two equal and opposite point charges. If the sphere is slightly displaced towards the positive charge and released then

The freezing point depression constant for water is $-1.86^{\circ} Cm^{-1}$. If $5.00 \,g$ $Na_2SO_4$ is dissolved in $45.0\,g$ $H_2O$, the freezing point is changed by $- 3.82^{\circ} C$. Calculate the Van't Hoff factor for $Na_2SO_4$.

In the following equation, x, t and F represent respectively, displacement, time and force : $F = a+bt + \frac{1}{c+dx} + A \,sin \left(\omega t + \phi\right).$ The dimensional formula for $A?d$ is

The ratio of minimum wavelengths of Lyman and Balmer series will be

With respect to the velocity constant of a reaction, which one of the following statement is not correct?

Consider the following processes : $\Delta H (kJ / mol)$ ½ A → B + 150 3B → 2C + D -125 E + A → 2D +350 For B + D → E + 2C, ΔH will be-

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition ?

The root mean square velocity of the molecules in a sample of helium is $ \frac{5}{7} $ th that of the molecules in a simple of hydrogen. If the temperature of hydrogen sample is $ 0^{\circ} C $ then that of helium sample is about

The hybridisation states of $ [Ni(CO)_4] $ , $ [Ni(CN)_4]^{2-} $ and $ [NiCl_4]^{2-} $ species are respectively

Which of the following has the minimum bond length?

A value of $ \theta$ satisfying $\sin 5 \theta - \sin 3 \theta + \sin \; \theta=0$ such that $0

If lines represented by $x + 3y - 6 = 0, 2x+y-4=0$ and $kx - 3y + 1 = 0$ are concurrent, then the value of $k$ is

The domain of $ f(x) = sin^{-1} [Log_2 (\frac {x} {2})] $ is

The velocity of water flowing in a non-uniform tube is 20 cm/s at a point where the tube radius is 0.2 cm. The velocity at another point, where the radius is 0.1 cm, is

The total number of atomic orbitals in fourth energy level of an atom is :

A wheel is rotating at $900 \,rpm$ about its axis. When the power is cut off it comes to rest in $1$ min. The angular retardation in $rad/s^{-2}$ is

A wheel is rotating at $ 900\,\,rpm $ about its axis. When the power is cut off it comes to rest in $ 1\min $ . The angular retardation in $ rad/{{s}^{2}} $ is

The $\alpha$-cells in the Islet of Langerhans secrete a hormone called