List of top Chemistry Questions

Ionic radii are

Which of the following is not a function of proteins?

Which of the following is not considered as an organometallic compound ?

Which one of the following ores is best concentrated by froth - floatation method?

An ideal gas expands in volume from $1?10^{-3} m^3$ to $1?10^{-2} m^3$ at $300\, K$ against a constant pressure of $1?10^5\, Nm^{-2}$. The work done is

Which of the following sets of quantum numbers is correct for an electron in 4f orbital?

As the temperature is raised from $20^{\circ}C$ to $40^{\circ}C$, the average kinetic energy of neon atoms changes by a factor of which of the following?

The standard reduction potential $E^{o}$ for the half reactions are as: $Z n \rightarrow Z n^{2+}+2 e^{-}, E^{o}=0.76\, V$ $C u \rightarrow C u^{2+}+2 e^{-}, E^{o}=0.34\, V$ The emf for the cell reaction: $Z n+C u^{2+} \rightarrow Z n^{2}+C u$

Arrange the following as increase in oxidation number : (i) $Mn ^{2+}$ (ii) $MnO _{2}$ (iii) $KMnO _{4}$ (iv) $K _{2} MnO _{4}$

The number of lattice arrangements in different crystal systems are:

If $20 \,g$ of a solute was dissolved in $500 \,mL$ of water and osmotic pressure of the solution was found to be $600\, mm$ of $Hg$ at $15^{\circ} C$, then molecular weight of the solute is:

The number of sodium atoms in $2$ moles of sodium ferrocyanide is:

According to Bohr's principle, the relation between principle quantum number $(n)$ and radius of orbit is :

The state of hybridisation of $B$ in $ BC{{l}_{3}} $ is:

Which is more acidic ?

Sucrose, a common sugar, is composed of

When methyl-t-butyl ether is formed ?

What is the pressure of 2 mole of $NH_3$ at 27$^\circ$C when its volume is 5 lit. in van der Waals equation (a = 4.17, b = 0 .03711)

N forms $NCl_3$ whereas P can form both $PCl_3$ and $PCl_5$. Why ?

Which of the following pairs give positive Tollen?s test?

Which of the following pairs give positive Tollen's test?

The methods chiefly used for the extraction of lead and tin from their ores are respectively

The compound having tetrahedral geometry is

Spin only magnetic moment of the compound $Hg[Co(SCN)_4] $ is

Acetaldehyde cannot show