List of top Chemistry Questions

In quantitative analysis of second group in lab. $H_2S$ gas is passed in acidic medium for ppt. When $Cu^{+2}$ and $Cd^{+2}$ react with $KCN$, than in which of the following condition, ppt will not be formed due to relative stability:

Which complex compound will give four isomers:

Which one of the following method is commonly used method for destruction of colloid:

Benzoic acid may be converted into ethyl benzoate by reaction with

When HCHO is treated with $ {{C}_{6}}{{H}_{5}}CHO $ in presence of KOH, the product are:

At infinite dilution equivalent conductances of $Ba^{2+}$ & $Cl^–$ ions are $127$ & $76$ $ohm^{–1}cm^{–1}eq^{–1}$ respectively. Equivalent conductance of $BaCl_2$ at infinite dilutions is:

For the reaction $C_2H_5OH(l)+3O_2(g)→ 2CO_2(g)+3H_2O(l)$ which one is true:

At $27ºC$ latent heat of fusion of a compound is $2930\ J/mol$. Entropy change is:

Froth floatation process is used for the concentration of

A certain aqueous solution of $FeCl _{3}$ [formula mass $=162]$ has a density of $1.1 g / mL$ and contains $20.0 \% FeCl _{3} .$ Molar concentration of this solution is

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out

The sulphide ore of copper is concentrated by:

SO have

A compound has $C =40 \%, H =13.33 \%$ and $N =46.67 \% .$ The empirical formula is:

$\text {Shape \ of }\ Fe(CO)_5\ \text {is:}$

Correct order of dissociation energy of $N_2$ and $N_2^+$ is:

Average molar kinetic energy of $CO$ and $N_2$ at same temperature is:

$2Zn +O_2→2ZnO \ \ \ \ ∆Gº=–616J $
$2Zn+S_2→2ZnS\ \ \ \ ∆Gº=–293J $
$S_2+2O_2→2SO_2\ \ \ \ ∆Gº=–408J $
$∆Gº\ for\ the\ following \ reaction\ is: $
$2ZnS+3O_2→2ZnO+2SO_2$

Volume of $CO_2$ obtained by the complete decomposition of $9.85\ gm \ BaCO_3$ is:

Which compound has planar structure:

Which ion is colourless:

Which compound form linear polymer due to H-bond:

Which statement is wrong:

Which one is responsible for produce energy in bio reaction: