In the sixth period, the orbitals that are filled are

The correct order of stability of given carbocation is :

Assertion : Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction between nitrogen and oxygen requires high temperature.

\(sp^3d^2\) hybridization is not displayed by 

The spin-only magnetic moment value of \(M ^{3+}\) ion (in gaseous state) from the pairs \(Cr ^{3+} / Cr ^{2+}\), \(Mn ^{3+} / Mn ^{2}, Fe ^{3+} / Fe ^{2+}\) and \(Co ^{3+} / Co ^{2+}\) that has negative standard electrode potential, is \(B.M...........\) [Nearest integer]

Arrange the following labelled hydrogens in decreasing order of acidity

Evaluate the following statements related to group \(14\) elements for their correctness. \((A)\)Covalent radius decreases down the group from \(\mathrm{C}\) to \(\mathrm{Pb}\) in a regular manner. \((B)\) Electronegativity decreases from \(\mathrm{C}\) to \(\mathrm{Pb}\) down the group gradually. \((C)\) Maximum covalence of \(\mathrm{C}\) is \(4\) whereas other elements can expand their covalence due to presence of \(d\) orbitals. \((D)\) Heavier elements do not form \(\mathrm{p} \pi-p \pi\) bonds. \((E)\) Carbon can exhibit negative oxidation states. Choose the correct answer from the options given below:

The ratio for the speed of the electron in the \(3^{ rd }\) orbit of \(He ^{+}\)to the speed of the electron in the \(3^{\text {ad }}\) orbit of hydrogen atom will be

\(\lim _{x \rightarrow 0} \frac{\sin ^{2}\left(\pi \cos ^{4} x\right)}{x^{4}}\) is equal to :

Assuming ideal behaviour, the magnitude of \(log \, K\) for the following reaction at \(25^{\circ} C\) is \(x \times 10^{-1} .\) The value of \(x\) is \(...... .\) (Integer answer) \(3 HC \equiv CH _{( g )} \rightleftharpoons C _{6} H _{6(\ell)}\) [Given: \(\Delta_{f} G ^{\circ}( HC \equiv CH )=-2.04 \times 10^{5}\, J mol ^{-1}\) \(\Delta_{f} G ^{\circ}\left( C _{6} H _{6}\right)=-1.24 \times 10^{5}\, J mol ^{-1} ; R =8.314\,\left. J K ^{-1} mol ^{-1}\right]\)

If an unbiased die, marked with \(-2,-1,0,1,2,3\) on its faces, is through five times, then the probability that the product of the outcomes is positive, is :

Given below are two statements :
Statement I: Aluminium upon reaction with NaOH forms \([Al(OH)_6]^{3-}\) ion.
Statement II: The geometry of \(ICl_4^-\), \(ClO_3^-\) and \(IBr_2^-\) is square planar, pyramidal and linear respectively.
In the light of the above statements, choose the correct answer from the options given below :

The potassium ferrocyanide solution gives Prussian blue colour, when added to :