Chemistry Test ...

______ metal generally occurs in free state.

Up to which element, the Law of Octaves was found applicable?

\(\mathrm{C}-\mathrm{Cl}\) bond of chlorobenzene in comparison to \(\mathrm{C}-\mathrm{Cl}\) bond of methyl chloride is:

The number of statement's, which are correct with respect to the compression of carbon dioxide from point (a) in the Andrews isotherm from the following is____

A. Carbon dioxide remains as a gas upto point (b)

B. Liquid carbon dioxide appears at point (c)

C. Liquid and gaseous carbon dioxide coexist between points (b) and (c)

D. As the volume decreases from (b) to (c), the amount of liquid decreases

If the wavelength for an electron emitted from \(\mathrm{H}\)-atom is \(3.3 \times 10^{-10} \mathrm{~m}\), then energy absorbed by the electron in its ground state compared to minimum energy required for its escape from the atom, is times. (Nearest integer)

[Given : \(\mathrm{h}=6.626 \times 10^{-34} \mathrm{~J} \mathrm{~s}\) ]

Mass of electron \(=9.1 \times 10^{-31} \mathrm{~kg}\)

Elements of group \(13\) are part of which of the following block of elements?

Ammonium chloride crystallizes in a body centred cubic lattice with edge length of unit cell of 390 pm. If the size of chloride ion is 180 pm, the size of ammonium ion would be:

Choose the correct answer. A thermodynamic state function is a quantity:

The number of electrons, protons andneutrons in a species are equal to \(18\), \(16\)and \(16\) respectively. Assign the propersymbol to the species.

The co-ordination number and oxidation state of \(\mathrm{Cr}\) in \(\mathrm{K}_{3}\left[\mathrm{Cr}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]\) are respectively: