AIEEE 2005 Chemistry Question Paper Mock Test

Lattice energy of an ionic compound depends upon:

The highest electrical conductivity of the following aqueous solutions is of:

Aluminium oxide may be electrolysed at $1000^{\circ }\text{C}$ to furnish aluminium metal (Atomic mass $=27\text{amu}$; $1\text{Faraday}=96,500\text{Coulombs}$). The cathode reaction is:
$${\text{Al}}^{3+}+3e^{-}\to \text{Al}$$
To prepare $5.12\text{kg}$ of aluminium metal by this method would require:

Consider an endothermic reaction, $X\to Y$ with the activation energies $E_b$ and $E_f$ for the backward and forward reactions, respectively. In general:

Consider the reaction: ${\text{N}}_2(g)+3{\text{H}}_2(g)\to 2{\text{NH}}_3(g)$ carried out at constant temperature and pressure. If $\Delta H$ and $\Delta U$ are the enthalpy and internal energy changes for the reaction, which of the following expressions is true?