List of top Chemistry Questions

At $CMC$, the surfactant molecules undergo

A unit cell of diamond consists of

The volume strength of $3.0\, N\, H_2O_2$ is

Three centre - two electron bond is present in

In the $3^{rd}$ period, the first ionisation potential is of the order

In the periodic table, the period number corresponds to

A cross-linked polymer is

For Freundlich isotherm a graph of log $\frac {x}{m}$ is plotted against $log\, P$. The slope of the line and its y-axis intercept, respectively corresponds to

Butylated hydroxy toluene as a food additive acts as

Enthalpy of combustion of carbon to $CO _{2}$ is $-393.5 \,kJ \,mol ^{-1}$. What amount of heat will be released upon formation of $35.2 \,g$ of $CO _{2}$ from carbon and oxygen gas?

Which of the following compounds undergoes nitration more readily?

The catenation tendency of $C, Si$ and $Ge$ is in the order Ge $

Electron gain enthalpy with negative sign of fluorine is less than that of chlorine due to :

Which of the following is paramagnetic ?

Sc(Z = 21) is a transition element but Zn (Z = 30) is not because :

Which of the following does not give oxygen on heating ?

\(12\, g\) of a nonvolatile solute dissolved in \(108\, g\) of water produces the relative lowering of vapor pressure of \(0.1.\)The molecular mass of the solute is :

Arrange in the correct order of stability (decreasing order) for the following molecules :

For gaseous state, if most probable speed is denoted by $c *$, average speed by $\overline{C}$ and root square speed by $c$, then for a large number of molecules, the ratios of these speeds are

In a face centred cubic lattice, atoms of $A$ form the comer points and atoms of $B$ form the face centred points. If two atoms of $A$ are missing from the comer points, the formula of the ionic compound is :

Which one of the following is the wrong assumption of kinetic theory of gases?

The standard enthalpies of formation of $CO_2(g), H_2O(l)$ and glucose(.v) at 25$^{\circ}$C- are 400 kJ/ mol. -300 kJ/mol and - 1300 kJ/mol, respectively. The standard enthalpy of combustion per gram of glucose at 25$^{\circ}$C is

Which of the following enzyme converts starch into maltose?

Which one has the highest boiling point?

Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of :