List of top Chemistry Questions

Which one of the following is a correct statement?

Which one of the following shows maximum value of paramagnetic behaviour?

The number of moles of $KMnO_4$ that will be needed to react with one mole of sulphite ion in acidic solution is

A nuclear reaction of $^{235}_{92}U$ with a neutron produces $^{90}_{36}Kr$ and two neutrons. Other element produced in this reaction is

The enthalpy of hydrogenation of cyclohexene is $-119.5\, kJ\, mol ^{-1}$. If resonance energy of benzene is $-150.4\, kJ\, mol ^{-1}$, its enthalpy of hydrogenation would be

The colloidal system of a solid dispersed in liquid medium, is called

The presence of electric charge on colloidal particles is indicated by the property, called

Pure water does not conduct electricity because it is

What is the fuel of atomic pile ?

The radius of the first Bohr orbit of hydrogen atom is $ 0.529\overset{\text{o}}{\mathop{\text{A}}}\, $ . The radius of the third orbit of $ {{He}^{+}} $ will be

The protective action of different lyophilic colloids is expressed in terms of

The reaction intermediate produced, by homolytic cleavage of a bond is called

The oxidation state of chromium in chromium trioxide is

Two liquid drops have diameters of $1\, cm$ and $1.5\, cm$ The ratio of excess of pressures inside them is

Nucleotide consists of

The hybridisation of the ipso-carbon in chlorobenzene is

The catalyst used in the manufacture of $H_{2}SO_{4}$ by contact process is

The osmotic pressure is expressed in the units of

Monel metal is an alloy of

The specific conductance $ (\kappa ) $ of an electrolyte of $0.1\, N$ concentration is related to equivalent $ (\Lambda ) $ by the following formula

The number of covalent bonds in fluorine molecule is

The following is not an example of oxyacids of sulphur

The bleaching action of chlorine is due to the liberation of the following

The group of elements in which the differentiating electrons enters in the antipenultimate shell of atoms are called