Which one of the following is an example of disproportionation reaction?

Given below are two statements :
Statement I: The condensation reaction between \(CH_3-CH=O\) and \(H_2N-NH-C(=O)-NH_2\) under optimum pH will produce \(CH_3-CH=N-N(H)-C(=O)-NH_2\).
Statement II: The molecule, \(Ph-CH(O-H)(O-CH_3)\) will generate \(Ph-CH=O\) in the presence of dilute acid.
In the light of the above statements, choose the correct answer from the options given below :

The \(\mathrm{F}^{-}\)ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.

The surface of sodium metal is irradiated with radiation of wavelength \(x\) nm. The kinetic energy of ejected electrons is \(2.8 \times 10^{-20}\) J. The work function of sodium is \(2.3\) eV. The value of \(x\) is _____ \(\times 10^2\) nm. (Nearest integer)
(Given: \(h = 6.6 \times 10^{-34}\) J s; \(1\) eV \(= 1.6 \times 10^{-19}\) J; \(c = 3.0 \times 10^8\) m s\(^{-1}\))

Which of the following is diamagnetic ?

\(C _{6} H _{12} O _{6} \stackrel{\text { Zymase }}{\longrightarrow} A \underset{\Delta}{\stackrel{ Na O I }{\longrightarrow}} B + CHI _{3}\) The number of carbon atoms present in the product \(B\) is \(.....\)

The correct statements among the following for a ' chromatography ' purification method is _______.

The oxidation states of \('P'\) in \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}, \mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}\) and \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\), respectively, are:

Initially a satellite of 100 kg is in a circular orbit of radius \(1.5 R _{ E }\). This satellite can be moved to a circular orbit of radius \(3 R _{ E }\) by supplying \(\alpha \times 10^6 J\) of energy. The value of \(\alpha\) is _________ .
(Take Radius of Earth \(R_E=6 \times 10^6 m\) and \(g =10 m / s ^2\) )

In an experiment for determination of refractive index of glass of a prism by \(i - \delta\) , plot it was found thata ray incident at angle \(35 ^o \), suffers a deviation of \(40 ^o \) and that it emerges at angle \(7 9 ^o \). In that case which of the following is closest to the maximum possible value of the refractive index?

The initial speed of a bullet fired from a rifle is \(630\, m/s\). The rifle is fired at the centre of a target \(700\, m\) away at the same level as the target. How far above the center of the target (in \(m\)) the rifle must be aimed in order to hit the target? (Take \(g=10 \;m/s^2\))

Two moles of an ideal monoatomic gas occupies a volume \(V\) at \(27^o C\). The gas expands adiabatically to a volume \(2\ V\). Calculate \((a)\) the final temperature of the gas and \((b)\) change in its internal energy.

Among the statements \((a)-(d)\), the incorrect ones are \((a)\) Octahedral \(Co(III)\) complexes with strong field ligands have very high magnetic moments \((b)\) When \(\Delta_{0}< P\), the \(d-\)electron configuration of \(Co(III)\) in an octahedral complex is \(t_{\text {eg }}^{4} e_{g}^{2}\) \((c)\) Wavelength of light absorbed by \(\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+}\) is lower than that of \(\left[\mathrm{CoF}_{6}\right]^{3-}\) \((d)\) If the \(\Delta_{0}\) for an octahedral complex of \(\mathrm{Co}(\mathrm{III})\) is \(18,000 \;\mathrm{cm}^{-1},\) the \(\Delta_{\mathrm{t}}\) for its tetrahedral complex with the same ligand will be \(16,000\;\mathrm{cm}^{-1}\)