List of top Chemistry Questions

This equation represents the preparation of gold sol by \[ 2 \, \text{AuCl}_3 + 3 \, \text{CHO} + 3 \, \text{H}_2 \text{O} \rightarrow 2 \, \text{Au} + 3 \, \text{HCOOH} + 6 \, \text{HCl} \]

Match the following

Observe the following species \[ \text{AlCl}_3, \, \text{NH}_3, \, \text{H}^+, \, \text{Co}^{3+}, \, \text{OH}^-, \, \text{H}\text{Mg}^{2+}, \, \text{BF}_3, \, \text{Cl}^- \] How many Lewis bases are present in the above list?

One mole of \( A (g) \) is heated to \( T(K) \) till the following equilibrium is obtained \[ A(g) \rightleftharpoons B(g) \] The equilibrium constant of this reaction is \( 10^{-1} \). After reaching the equilibrium, 0.5 moles of A (g) is added and heated. The equilibrium is again established. The value of \( \left[\frac{A}{B}\right] \) is

Observe the following reaction \[ \text{a} \, \text{P}_4(s) + \text{b} \, \text{OH}^-(aq) + \text{H}_2\text{O}(l) \rightarrow \text{c} \, \text{PH}_3(g) + \text{d} \, \text{H}_2\text{PO}_4^-(aq) \] a, b, c and d are respectively

If for the reaction \[ \text{CCL}_3(g) \rightarrow \text{C}(g) + 3\text{Cl}(g), \] the following data is given: \[ \Delta H^\circ_{\text{CCL}_3(l)} = 30 \, \text{kJ mol}^{-1}, \, \text{vap} = \text{vaporization} \] \[ \Delta H^\circ_{\text{CCl}_3} = -136.0 \, \text{kJ mol}^{-1}, \, f = \text{formation} \] \[ \Delta H^\circ_{\text{C}} = 714.0 \, \text{kJ mol}^{-1}, \, a = \text{atomization} \] \[ \Delta H^\circ_{\text{Cl}} = 242.0 \, \text{kJ mol}^{-1}, \, a = \text{atomization} \] The bond mean enthalpy of C-Cl in CCl\(_4\)(l) is: \[ \text{CCL}_4(g) \rightarrow \text{C}(g) + 3\text{Cl}(g) \text{ gives the bond mean enthalpy.} \]

The following data is obtained for one mole of a gas. The gas deviates from ideal behavior in the pressure (in bar) range