\(\mathrm{X} \mathrm{g}\) of ethylamine is subjected to reaction with \(\mathrm{NaNO}_2 / \mathrm{HCl}\) followed by water; evolved dinitrogen gas which occupied \(2.24 \mathrm{~L}\) volume at \(STP.\) \(\mathrm{X}\) is _______ \(\times 10^{-1} \mathrm{~g}\).

The steam volatile compounds among the following are _______.


Choose the correct answer from the options given below :

An accelerated electron has a speed of \(5 \times 10^{6} \,\mathrm{~ms}^{-1}\) with an uncertainty of \(0.02\,\%\). The uncertainty in finding its location while in motion is \(x \times 10^{-9}\, \mathrm{~m}\). The value of \(x\) is \(......\) (Nearest integer) [Use mass of electron \(\left.=9.1 \times 10^{-31}\, \mathrm{~kg}, \mathrm{~h}=6.63 \times 10^{-34}\, \mathrm{~J} \mathrm{~s}, \)\(\pi=3.14\right]\)

Which of the following is not formed when \(H_2S\) reacts with acidic \(K_2Cr_2O_7\) solution ?

Consider the following cell reaction : \(\mathrm{Cd}_{(s)}+\mathrm{Hg}_{2} \mathrm{SO}_{4(s)}+\frac{9}{5} \mathrm{H}_{2} \mathrm{O}_{(l)} \rightleftharpoons \mathrm{CdSO}_{4} \cdot \frac{9}{5} \mathrm{H}_{2} \mathrm{O}_{(s)}+2 \mathrm{Hg}_{(l)}\) The value of \(\mathrm{E}_{\text {cell }}^{0}\) is \(4.315\, \mathrm{~V}\) at \(25^{\circ} \mathrm{C}\). If \(\Delta \mathrm{H}^{\circ}=-825.2\, \mathrm{~kJ} \,\mathrm{~mol}^{-1}\), the standard entropy change \(\Delta \mathrm{S}^{\circ}\) in \(\mathrm{J} \,\mathrm{K}^{-1}\) is ........ . (Nearest integer) [Given : Faraday constant \(=96487\, \mathrm{C}\, \mathrm{mol}^{-1}\) ]

Methods used for purification of organic compounds are based on _______.

The anodic half-cell of lead-acid battery is recharged using electricity of \(0.05\, Faraday\). The amount of \(PbSO_4\) electrolyzed in \(g\) during the process is (Molar mass of \(PbSO_4 = 303\, g\, mol^{-1}\))

Four closed surfaces and corresponding charge distributions are shown below Let the respective electric fluxes through the surfaces be \({\phi _1},{\phi _2},{\phi _3}\) and \({\phi _4}\) . Then

In the reported figure, heat energy absorbed by a system in going through a cyclic process is \(......\,\pi J\)

Consider the complete combustion of butane, the amount of butane utilized to produce \(72.0\, \mathrm{~g}\) of water is \(....\,\times 10^{-1}\, \mathrm{~g} .\) (in nearest integer)

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

\(\begin{aligned}
& \text { If } \frac{1}{1^4}+\frac{1}{2^4}+\frac{1}{3^4}+\ldots . . \infty=\frac{\pi^4}{90}, \\
& \frac{1}{1^4}+\frac{1}{3^4}+\frac{1}{5^4}+\ldots . . \infty=\alpha, \\
& \frac{1}{2^4}+\frac{1}{4^4}+\frac{1}{6^4}+\ldots . \infty=\beta,
\end{aligned}\)
then \(\frac{\alpha}{\beta}\) is equal to

The major product of the following reaction is: \(CH _{3} CH _{2} CH = CH _{2}\) \(\xrightarrow[{Rh\,\,catalyst}]{{{H_2}/CO}}\)