Chemistry Test ...

Which of the following is a set of essential amino acids?

For the reaction \(\mathrm{N}_{2} \mathrm{O}_{4}(g) \rightleftharpoons 2 \mathrm{NO}_{2}(g)\), if percentage of \(\mathrm{N}_{2} \mathrm{O}_{4}\) are \(25 \%, 50 \%, 75 \%\) and \(100 \%\), then the sequence of observed vapour densities will be

Ethylidene chloride is a/an ___________.

Which of the following conditions is not correct for ideal solution

If \(20 mL\) of ethanol (density \(=0.7893 g / mL\) ) is mixed with \(40 mL\) water (density= \(0.9971 g / mL\) ) at \(25^{\circ} C\), the final solution has density of \(0.9571 g / mL\). Calculate the molality of alcohol in the final solution. (as nearest integer)

The order of basic strength in gas phase of the following compound would be

\(C u^{+}\)ion is not stable in aqueous solution because:

A mixture is known to contain \(N O_{ {3}}^-\) and \(N O_{ {2}}^-\). Before performing ring test for \(N O_{ {3}}^-\) the aqueous solution should be made free of \(N O_{ {2}}^-\). This is done by heating aqueous extract with:

Identify the species in which the metal atom is in +6 oxidation state.

On oxidation with a mild oxidising agent like \(Br _{2} / H _{2} O\), the glucose is oxidised to: