When compared with alkaline earth metals, the alkali metals have

Which of the following is not correct?

A gas is present at a pressure of \(2 \mathrm{~atm}\). What should be the increase in pressure, so that the volume of the gas can be decreased to \(\frac{1}{4}\) th of the initial volume at constant 4 temperature?

Total number of aromatic compounds from below is:

Given \(\mathrm{E}^{\circ} \mathrm{Mn}^{7+} / \mathrm{Mn}^{2+}=1.51 \mathrm{~V}, \mathrm{E}_{\mathrm{Mn}^{\circ+} / \mathrm{Mn}^{2+}}=1.23 \mathrm{~V}\) Calculate \(\mathrm{E}^{\circ} \mathrm{Mn}^{7+} / \mathrm{Mn}^{4+}\)

The kinetic energy of electrons emitted, when radiation of frequency \(1.0 \times 10^{15} \mathrm{~Hz}\) hits a metal, is \(2 \times 10^{-19} \mathrm{~J}\). What is the threshold frequency of the metal (in Hz)? \(\left(h=6.6 \times 10^{-34} \mathrm{Js}\right)\)

An alkene \((\mathrm{X})\) on ozonolysis gives propanal and ethanal. What is \(\mathrm{X}\) ?

The mid point of the chord \(4 x-3 y=5\) of the hyperbola \(2 x^2-3 y^2=12\) is

In planetary motion the areal velocity of position vector of a planet depends on angular velocity \(\omega\) and the distance of the planet from sun \(r\). The correct relation for areal velocity is

Two identical bar magnets of magnetic moment \(M\) each, are placed along \(X\) and \(Y\)-axes, respectively at a distance \(d\) from the origin (as shown in the figure). The origin lies on perpendicular bisector of magnet placed on \(X\)-axis and on the magnetic axis of magnet placed on \(Y\)-axis. If the magnitude of total magnetic field at the origin is \(B=\alpha\left[\frac{\mu_0}{4 \pi} \frac{M}{d^3}\right]\), then the value of constant \(\alpha\) will be \(\langle d>>l\), where \(l\) is the length of the bar magnets and direction of \(\mathrm{N}\) to \(\mathrm{S}\) in magnets is opposite with respect to each other)

A cubic structure is formed where atoms of element \(X\) are occupied at corner of cube and also at face centers. Atoms of element \(Y\) are present at body center and at the edge centers. If all the atoms are removed along a plane passing through the middle of the cube (bisecting the four edges), the formula will become

What is the IUPAC name of the below given compound?

If \(\overrightarrow{\mathbf{a}}, \overrightarrow{\mathbf{b}}, \overrightarrow{\mathbf{c}}\) are three non-coplanar vectors, then the vector equation \(\overrightarrow{\mathbf{r}}=(1-p-q) \overrightarrow{\mathbf{a}}+p \overrightarrow{\mathbf{b}}+q \overrightarrow{\mathbf{c}}\) represents a :