List of practice Questions

The largest value of $2x^3 - 3x^2 - 12x + 5$ for $-2 \leq x \leq 4$ occurs at $x$ is equal to :

Total number of books is $2n + 1$. One is allowed to select a minimum of the one book and a maximum of $n$ books. If total number of selections if $63$, then value of $n$ is :

Given function $f(x)=\left(\frac{e^{2 x}-1}{e^{2 x}+1}\right)$ is.

Value of $\displaystyle\sum_{ k =1}^{6}\left(\frac{2 k \pi}{7}\right)- i \cos \left(\frac{2 k \pi}{7}\right)$ is equal to.

The oxidation number of oxygen in hydrogen peroxide is:

$KF$ combines with $HF$ to form $KHF_2$. The compound contains the species:

The molecular electronic configuration of $Be_2$ is:

Which of the following silver salts is insoluble in water ?

Electron of mass $m$ and charge $q$ is travelling with a speed $v$ along a circular path of radius $r$ at right angles to a uniform magnetic field of intensity $B$. If the speed of the electron is doubled and the magnetic field is halved the resulting path would have a radius:

The induction coil works on the principle of :

The disc of a siren containing $60$ holes rotates at a constant speed of $360\, rpm$. The emitted sound is in unison with a tuning fork of frequency :

If a liquid does not wet glass, its angle of contact is :

An electron moves at right angle to a magnetic field of $1.5 \times 10^{-2} T$ with a speed of $6 \times 10^{7} m / s$. If the specific charge of the electron is $1.7 \times 10^{11} C / kg$. The radius of the circular nath will he

Infrared radiation was discovered in $1800$ by :

The work done in carrying a charge $q$ once round a circle of radius $r$ with a charge $Q$ at the centre is :

For the reaction (at $1240 \,K$ and $1$ atm.) $ CaCO_3 (s) \rightarrow CaO(s) + CO_2 (g) $ $\Delta H = 176 \, kJ/ mol; \Delta E$ will be :

Which of the following is deliquescent ?

Dacron is polymer of :

Among the following sets of quantum numbers. Which one is incorrect for $4d$ electron ?

In a circuit L, C and R are connected in series with an alternating voltage source of frequency f .The current leads the voltage by 45$^{\circ}$. The value of C is

Charles' law is represented mathematically as :

Cyanohydrin of which of the following forms lactic acid:

The wave theory of light, in its original form, was first postulated by-

Incorrect statement for pyrophosphorus acid $H_4P_2O_5$ is :