Identify \([\mathrm{A}]\) and \([\mathrm{B}]\) in the following
\[
{ }_{89}^{227} \mathrm{Ac} \stackrel{-\beta}{\longrightarrow}[\mathrm{A}] \stackrel{-\alpha}{\longrightarrow}[\mathrm{B}] \stackrel{-\alpha}{\longrightarrow} \mathrm{Rn}
\]

The dispersed phase and dispersion medium of fog respectively are

Hybridization of \(\mathrm{C}_2\) and \(\mathrm{C}_3\) of \(\mathrm{H}_3 \mathrm{C}-\mathrm{CH}=\mathrm{C}=\mathrm{CH}-\mathrm{CH}_3\) are

Increasing order of the nucleophilic substitution of following compounds is

In aluminium extraction by the Bayer process, alumina is extracted from bauxite by sodium hydroxide at high temperature and pressures :
\(\mathrm{Al}_2 \mathrm{O}_3(\mathrm{~s})+2 \mathrm{OH}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{Al}_2 \mathrm{O}_2(\mathrm{aq})+\mathrm{H}_2 \mathrm{O}(1)\)

Solid impurities such as \(\mathrm{Fe}_2 \mathrm{O}_3\) and \(\mathrm{SiO}_2\) are removed and then \(\mathrm{Al}(\mathrm{OH})_4^{-}\)is reprecipitated : \(2 \mathrm{Al}(\mathrm{OH})_4^{-} \rightarrow \mathrm{Al}_2 \mathrm{O}_3 \cdot 3 \mathrm{H}_2 \mathrm{O}(\mathrm{s})+2 \mathrm{OH}^{-}\)(aq) . In the industrial world :

Which of the following species exhibits both LMCT and paramagnetism?

\({ }_{98} \mathrm{Cf}^{246}\) was formed along with a neutron when an unknown radioactive substance was bombarded with \({ }_{6} \mathrm{C}^{12}\). The unknown substance was :

At \(25^{\circ} \mathrm{C}, \mathrm{pH}\) of a \(10^{-8} \mathrm{M}\) aqueous \(\mathrm{KOH}\)
solution will be

Which one of the following has the lowest ionization energy?

Let \(P(4,3)\) be a point on the hyperbola \(\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=\mathrm{1}\). If the normal at \(P\) intersects the \(X\) -axis at (16,0) , then the eccentricity of the hyperbola is

In an experiment on a circuit as shown in the figure, the voltmeter shows \(8 \mathrm{~V}\) reading. The resistance of the voltmeter is,

Arrange the following in order of increasing mass
I. 1 mole of \(\mathrm{N}_2\)
II. \(0.5 \mathrm{~mole}^2\) of \(\mathrm{O}_3\)
III. \(3.011 \times 10^{23} \mathrm{molecules}\) of \(\mathrm{O}_2\)
IV. 0.5 gram atom of \(\mathrm{O}_2\)

The ratio of volumes of \(\mathrm{CH}_{3} \mathrm{COOH } \text{ 0.1}\) (N) to CH COONa 0.1 (N) required to prepare a buffer solution of \(\mathrm{pH} 5.74\) is (Given, \(p K_{a}\) of \(C H_{3} C O O H\) is \(\left.4.74\right)\)