\(K _2 Cr _2 O _7\) paper acidified with dilute \(H _2 SO _4\) turns green when exposed to

The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about \(9\). The spectral series are

The descending order of basicity of following amines is _______.

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Which of the following combination of statements is true regarding the interpretation of the atomic orbitals? \((1)\) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angular momentum. \((2)\) For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number \((3)\) According to wave mechanics, the ground state angular momentum is equal to \(\frac {h}{2\pi }\) \((4)\) The plot of \(\Psi \,\,Vs\,\,r\) for various azimuthal quantum numbers, shows peak shifting towards higher \(r\) value

Consider the following species:
BrF\(_5\), XeF\(_5^-\), BF\(_4^-\), ICl\(_4^-\), XeF\(_4\), SF\(_4\), NH\(_4^+\), ClF\(_3\), XeF\(_2\), ICl\(_2^-\)
Number of species having sp\(^3\)d hybridized central atom is __________.

Identify the coordination complexes in which the central metal ion has \(d^4\) configuration.

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An aqueous solution of volume \(300\,cm ^3\) contains \(0.63\,g\) of protein. The osmotic pressure of the solution at \(300\,K\) is \(1.29\,mbar\). The molar mass of the protein is \(.........\,g\,mol ^{-1}\) Given : \(R =0.083\,L\,bar\,K ^{-1} mol ^{-1}\)

Let the direction cosines of two lines satisfy the equations: \( 4l+m-n=0 \) and \( 2mn+10nl+3lm=0 \). Then the cosine of the acute angle between these lines is:

Xenon hexafluoride on partial hydrolysis produces compounds \('X'\) and \('Y'\) . Compounds \('X'\) and \('Y'\) and the oxidation state of \(Xe\) are respectively

The calculated spin-only magnetic moments of \(\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{OH})_6\right]\) and \(\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{OH})_6\right]\) respectively are _______.

For the given circuit, in the steady state, \(\left| V _{ B }- V _{ D }\right|=.......V.\)

Maximum number of electrons that can be accommodated in shell with \(n=4\) are:

If \(\frac{1}{2 \times 3 \times 4}+\frac{1}{3 \times 4 \times 5}+\frac{1}{4 \times 5 \times 6}+\ldots+\) \(\frac{1}{100 \times 101 \times 102}=\frac{ k }{101}\), then \(34\,k\) is equal to \(.....\)