Chemistry Test ...

If the valence shell electronic configuration for an element is \(\mathrm{ns}^{2} \mathrm{np}^{5}\), this element belongs to the group of:

Consider the Newman projection formulas shown below:

Which of the following statements is correct?

In a CCP lattice of X and Y, X atoms are present at the corners while Y atoms are at face centres. Then, the formula of the compound would be if one of the X atoms from a corner is replaced by Z atoms (also monovalent)?

The state of a thermodynamic system is described by its measurable or macroscopic (bulk) properties. These are:

In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of:

Which of the following ligands form a chelate?

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium bromide?

\(\mathrm{Fe}^{3+}\) compounds are more stable than \(\mathrm{Fe}^{2+}\) compounds because:

A buffer solution contains \(100~ mL\) of \(0.01 M ~CH _{3} COOH\) and \(200 ~mL\) of \(0.02 M~CH _{3} COONa\). \(700 ~mL\) of water is added to this solution. \(pH\) before and after dilution are: \(\left(p K_{a}=4.74, \log 4 = 0.602\right)\)

In solid state \(\mathrm{N}_{2} \mathrm{O}_{5}\) exists as: